MAKITA CORPORATION Patent applications |
Patent application number | Title | Published |
20160141932 | ELECTRIC WORKING MACHINE - The present application discloses an electric working machine. The electric working machine includes a motor including a stator. The stator includes: a stator core haring a plurality of tooth portions radially extending along a radial direction; and a first coil, a second coil, and a third coil wound on the tooth portions. A start end of the first coil and a finish end of the second coil, a start end of the second coil and a finish end of the third coil, and a start end of the third coil and a finish end of the first coil are led out within a range of 200 degrees from the stator. | 05-19-2016 |
20160107202 | POWER-OPERATED AIR PROPELLING WORK APPARATUS - A power-operated air propelling work apparatus includes: an air flow pipe including an air inlet opening, an air outlet opening and a pipe wall formed between the air inlet opening and the air outlet opening to define an air flow passageway inside the pipe wall; an electric air propelling fan disposed within the air flow passageway for sucking in air from the air inlet opening and blowing out air from the air outlet opening; an apparatus housing surrounding and supporting the air flow pipe and forming a housing space between the apparatus housing and the air flow pipe; and a control circuit unit disposed within the housing space for controlling an operation of the electric air propelling fan, wherein the pipe wall is formed with an air passage hole by which the air flow passageway and the housing space communicate with each other. | 04-21-2016 |
20160090919 | THROTTLE OPERATING DEVICE - A throttle operating device that adjusts the opening degree of an engine throttle valve is provided. In a throttle operating device according to an aspect of the invention, one end of an inner cable inserted through an outer tube is fixed to a cable fixing part provided in a throttle lever, and the opening degree of the engine throttle valve is adjusted via the inner cable by rotationally operating the throttle lever. The one end of the inner cable is fixed to the cable fixing part with the extending direction of the inner cable changed within the throttle lever. Additionally, a moving mechanism that moves the cable fixing part along a longitudinal direction of the inner cable, is provided in the throttle lever. | 03-31-2016 |
20160047401 | OIL PUMP - The present invention relates to an oil pump for use in and attached to a device (e.g., chain saw) having an oil-supplied portion requiring an oil supply. An oil pump supplies lubricating oil to a guide groove of a guide bar in such a manner that a plunger having a gear portion meshing with a drive worm provided on a chain saw reciprocally moves in a pump body while rotating. Two guide pins for positioning an oil pump when attaching the oil pump to a chain saw body are provided on an attachment surface of the pump body to the chain saw body. The two guide pins are spaced apart in an axial direction of the plunger, each disposed on a centerline of a transverse cross section of the plunger. | 02-18-2016 |
20160028344 | Motor Driven Appliance - A motor driven appliance comprises a battery, a motor, at least one switch, a control unit, an abnormality detection unit, a determination unit, and a processing unit. The at least one switch comprises an operation switch. The control unit controls driving of the motor by controlling power supply from the battery to the motor when the operation switch is turned on. The abnormality detection unit detects abnormality of the appliance. The determination unit determines whether the detected abnormality is a first type abnormality that can be cleared when the operation switch is switched from on to off, or is a second type abnormality that cannot be cleared even if the operation switch is merely switched from on to off. The processing unit is configured to perform a specific process when it is determined that the detected abnormality is the second type abnormality. | 01-28-2016 |
20150377253 | POWER-OPERATED AIR BLOWING WORK APPARATUS - A power-operated air blowing work apparatus comprises: a volute casing including a centrifugal fan installed therein and having a front wall formed with an air intake aperture for sucking air from an atmosphere into the volute casing by the centrifugal fan; an engine mounted to the volute casing in a rear side of the volute casing and connected to the centrifugal fan for rotating the centrifugal fan; an engine casing covering the engine from behind the engine in the rear side of the volute casing, and an air suction passage communicating from inside the engine casing toward inside the front wall of the volute casing for drawing air in the engine casing toward inside the front wall of the volute casing. | 12-31-2015 |
20150377117 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - A stratified scavenging two-stroke engine includes a first scavenging passage that extends from a first scavenging intake that opens to the inside of the crankcase to a scavenging port that opens to the inside of a cylinder, and a second scavenging passage that branches from the first scavenging passage and extends to a second scavenging intake that opens to the inside of the crankcase. An air passage is provided to supply air for pre-scavenging into the first scavenging passage at a position closer to the first scavenging intake than a position at which the second scavenging passage branches from the first scavenging passage. A first check valve inhibits a flow of air from the first scavenging passage during an upward stroke of the piston, and a second check valve inhibits a flow of air and a gaseous mixture from the first scavenging passage during a downward stroke of the piston. | 12-31-2015 |
20150375416 | CHAINSAW - A chainsaw includes a body housing, an elongated guide bar projecting forward from the body housing, a saw-chain mounted on the periphery of the guide bar for rotation, an electric motor mounted within the body housing for rotating, and a top handle provided on an upper portion of the body housing above the guide bar and extending in a fore-and-aft direction. A plurality of rechargeable battery packs is mounted on the body housing as a source of power supply for the electric motor. The battery packs are mounted to the body housing in such a manner that a center of gravity of the chainsaw observed from the back side is positioned in a two times extent of lateral width of a gripe portion of the top handle at both sides of a vertical centerline of the gripe portion. | 12-31-2015 |
20150375315 | CUTTING TOOL - A motor housing of housings forming an outer casing of a tool main body is provided with two battery attachment portions allowing attachment of rechargeable batteries. The two battery attachment portions are configured as slide attachment type battery attachment portions. The two battery attachment portions are suited to slide attachment type rechargeable batteries that are attached through sliding. The two rechargeable batteries are attached in the right-left direction of the tool main body so that the two rechargeable batteries can be arranged side by side in the direction in which the tool main body extends. | 12-31-2015 |
20150372512 | CHARGE CONTROL DEVICE, BATTERY PACK, AND CHARGER - A charge control device of one example of the present invention comprises a temperature detection unit, a storage unit, and an upper limit setting unit. The storage unit stores a reference current characteristic and at least one of a first current characteristic and a second current characteristic as a charging current characteristic, and stores a reference voltage characteristic and at least one of a first voltage characteristic and a second voltage characteristic as a charging voltage characteristic. The upper limit setting unit selects a characteristic used to set upper limits of a charging current and a charging voltage to the battery from among a plurality of the charging current characteristics and a plurality of the charging voltage characteristics stored in the storage unit. | 12-24-2015 |
20150366424 | NOZZLE PIPE - A nozzle pipe is to be coupled to a distal open end of an air blow-off tube of a blower apparatus for regulating the profile of an airflow blown out from the blow-off tube. The nozzle pipe comprises an outer tubular member and an inner tubular member coaxially disposed within the outer tubular member. The inner tubular member has a circumferential wall formed with apertures allowing air passage therethrough. The outer tubular member and the inner tubular member provides a first space therebetween to form a first air passage, while the inner tubular member provides a second space therein to form a second air passage. A plurality of rectifier fins are disposed inward from the outer tubular member, standing radially and extending longitudinally, and spaced apart circumferentially from each other. The fins extend inclined at an angle with reference to the longitudinal central axis of the tubular members. | 12-24-2015 |
20150366133 | BRUSH CUTTER - A brush cutter includes a frame rod, a front end housing fixedly mounted to a front end of the frame rod, a cutting blade mounted on a support shaft within the front end housing, a rear end housing fixedly mounted to a rear end of the frame rod, an electric motor mounted within the rear end housing for rotation of the cutting blade, and a source of power supply for supplying electric power to the motor. In the brush cutter, a plurality of rechargeable battery packs adapted to use in electric power tools are used as the source of power supply for the motor. | 12-24-2015 |
20150364972 | ANGLE TOOL AND ELECTRIC TOOL - An angle impact driver includes a brushless motor having a motor shaft, a switch for energizing the brushless motor, an output shaft to which rotation of the brushless motor is transferred, the output shaft being angled with respect to the motor shaft, a housing accommodating the brushless motor and the switch, and a the sensor board detecting rotation of the motor shaft, in which the sensor board is secured to the brushless motor. | 12-17-2015 |
20150357853 | MOTOR-DRIVEN APPLIANCE AND MAIN BODY THEREOF - A main body of a motor-driven appliance is configured such that a plurality of battery packs are attachable thereto. Each of the battery packs contains a battery. The main body of the motor-driven appliance acquires, from each of the plurality of battery packs, discharge capacity information indicating a discharge capacity of the contained battery. The main body of the motor-driven appliance sets at least one control parameter to control discharge from a power source to a motor, in accordance with at least the discharge capacity information of a battery with a lowest discharge capacity, among the acquired respective discharge capacity information. | 12-10-2015 |
20150345460 | METHOD AND DEVICE FOR CONTROLLING THE OPERATION OF AN INTERNAL COMBUSTION ENGINE OF A PORTABLE WORK DEVICE - The invention relates to a method and a control device for operating an internal combustion engine of a portable work device, said method having the following method steps: a) storing a starting ignition curve for specifying an ignition time after a startup time of the internal combustion engine and an operating ignition curve for specifying the ignition time in a speed range assigned to the nominal operation of the internal combustion engine, b) reading the current engine speed, c) reading at least one time value which indicates the time that has elapsed since a reference time, wherein the reference time can relate to the startup time of the internal combustion engine, and d) determining and/or initiating a switchover process from the starting ignition curve to the operating ignition curve on the basis of the current engine speed and the time value. | 12-03-2015 |
20150340921 | ELECTRIC POWER TOOL - An electric power tool comprises: a motor configured to drive a tool; a control unit configured to control the motor; a communication board comprising an antenna and a communication circuit, which are configured to establish close-proximity wireless communication with an external communication terminal; and a housing configured to house the motor, the control unit, and the communication board. The housing comprises a grip portion having a hollow space, which is to be gripped by a user. The communication board is arranged inside the grip portion. | 11-26-2015 |
20150327352 | POWER-OPERATED WORK APPARATUS - A power-operated work apparatus has a machine body which includes an electrostatic charge inducing member that may induce electrostatic charges thereon, and is adapted to be used with the machine body maintained electrically ungrounded. The work apparatus includes: a grip which is adapted to be grasped and held by a user and has an outer surface to be touched by the user and an inner surface forming an inner space; an electroconductive body member which forms an electroconductive body exposed on at least a part of the outer surface of the grip; and an electroconductive line member which is configured to be charged with the electrostatic charges induced on the electrostatic charge inducing member and has a part disposed inside the grip neighboring to and without electrically touching the electroconductive body forming member. The electrostatic charges are to spark from the electroconductive line member to the electroconductive body member. | 11-12-2015 |
20150314432 | DRIVING TOOL - A driving tool, such as a nailer, includes a compression cylinder, a compression piston, an electric motor, a control apparatus, a trigger, a trigger switch, a driver guide, and a contact-arm switch. The control apparatus prevents fasteners, such as nails, from being driven when the controller identifies a state, in which it is likely that a malfunction or mis-operation of the driving tool is occurring. | 11-05-2015 |
20150283631 | WORKING MACHINE - A chainsaw as a working machine, which switches among stop, drive, and choke operations of an internal combustion engine, includes an operation lever that is turnable, a turning member turnably combined with the operation lever, and a torsion coil spring holding abutting of the operation lever and the turning member. The turning member is coupled to a choke operating member via a choke rod and is regulated in turning from drive position to stop position. When the operation lever is turned from drive position to choke position, the turning member also turns to move the choke rod, by which the choke operating member closes the choke valve. Meanwhile, the operation lever is turned from drive position to stop position, against the turning force of the torsion coil spring. | 10-08-2015 |
20150246438 | HAMMER TOOL - A hammer tool for hammering on a workpiece by a tool bit moving at least linearly in a longitudinal direction of the tool bit, configured so that a hammering element moves toward the tool bit to hits the tool bit by way of air pressure fluctuation in an air chamber when a driving element is moved from a first position to a second position. In addition, the stroke center position of the reciprocating movement of the driving element moved between the first position and the second position is configured to be changeable. | 09-03-2015 |
20150180307 | Power Tool - A power tool includes a housing and a brushless motor, the brushless motor having a stator and a rotor inside the housing, the rotor including a rotor core having a plurality of axially extending through holes and a permanent magnet in each of the plurality of through holes. The rotor is provided with at least one positioning structure by which the rotor core can be held in a desired circumferential orientation while the permanent magnets are inserted into the through holes. | 06-25-2015 |
20150152901 | FASTENING ARRANGEMENT, PORTABLE WORKING TOOL AND METHOD OF FASTENING A FIRST HOUSING SECTION TO A SECOND HOUSING SECTION - A fastening arrangement for fastening a first housing section to a second housing section of a portable working tool as well as a method by means of which the connection of two housing sections to each other can be simplified are disclosed. A working tool is proposed with a bolt, which at least in sections has an external thread, an internal nut, which at least in sections has an internal thread, wherein the internal thread of the internal nut engages in the external thread of the bolt, and an external nut, which is connected to the internal nut in such a way that the internal nut is held in a displaceable manner in the external nut, whereby during a rotational movement of the external nut the internal nut follows the rotational movement of the external nut and the internal nut performs an axial movement relative to the external nut. | 06-04-2015 |
20150113760 | WORK APPARATUS - A work apparatus is comprised of a blower unit including a drive motor; a volute casing, a fan rotatably supported within the volute casing and driven by the drive motor, and an airflow duct connected to the volute casing, thereby blowing out or sucking in air through the airflow duct; and of an airflow tube coupled to the airflow duct of the blower unit and having an open distal end for blowing out or sucking in air through the airflow tube. The airflow tube is provided with a grip handle adapted for being held and operated by the operator. Within the airflow tube is arranged an electrically conductive wire at least between the grip handle and the open distal end, beyond which is provided an electrically grounding wire connected to the electrically conductive wire and drooping therefrom to be touchable to earth. | 04-30-2015 |
20150113759 | BACKPACK WORK APPARATUS - A backpack work apparatus comprises a back carrier frame; a drive motor mounted on the back carrier frame; a work tool driven by the drive motor; a right and left shoulder straps; a chest strap linking the intermediate points of the right and left shoulder straps; and an emergency release buckle device provided at the point where the chest strap is coupled to the intermediate point of the left shoulder strap, which is divided by the buckle device into two parts, an upper strap and a lower strap. The buckle device normally buckles the chest strap, the upper strap and the lower strap, and is capable of releasing the lower strap and the chest strap from the upper strap via a one part motion in an emergency. | 04-30-2015 |
20150042052 | WORK TOOL - A power tool includes a spindle and a clamp shaft, and drives a tool accessory clamped by an outer flange and a clamp head. A ball or a grooved clamping element is configured to hold the clamp shaft against the spindle in a fixed manner. A holding element holds and moves the ball or grooved clamping element. A coil spring biases the holding element. The ball or grooved clamping element is movable between a first position where it holds the clamp shaft and a second position where it does not hold the clamp shaft. The holding element is capable of moving the ball or the grooved clamping element from the first position to the second position. The coil spring biases the holding element and prevents movement of the holding element when the ball or the grooved clamping element is located in the second position. | 02-12-2015 |
20150041170 | Impact Tool - An impact tool performs a processing operation on a workpiece by carrying out an impact operation on a tool bit in a longitudinal axis direction. The impact tool includes a motor having a rotor and a stator, a tool main body housing the motor, a drive shaft parallel to a longitudinal axis of the tool bit and rotatably driven by the motor, and an oscillating member that is supported by the drive shaft and that carries out an oscillating movement in the axial direction of the drive shaft based on the rotational motion of the drive shaft. A tool drive mechanism is coupled to the oscillating member so that the oscillating movement of the oscillating member linearly moves the tool bit in the longitudinal axis direction. The motor is an outer rotor motor in which the rotor is disposed on an radially outer side of the stator. | 02-12-2015 |
20150035488 | CHARGING SYSTEM - A charging control device includes a control unit and a monitoring unit. The control unit performs at least one of controlling charging to a rechargeable battery and monitoring a state of a rechargeable battery, while outputting a state signal which indicates an operation state of the control unit. The monitoring unit determines whether or not the operation state of the control unit is a predesignated specified operation state based on the state signal outputted from the control unit. | 02-05-2015 |
20150027743 | ELECTRIC POWER TOOL - An electric power tool capable of suppressing damage to a fan housed in a housing to cool a motor due to foreign matter without increasing the number of parts. An impact driver includes a motor, a centrifugal fan attached to an output shaft of the motor to cool the motor, an annular air collecting member disposed between the motor and the centrifugal fan to collect cooling air by the centrifugal fan, a housing that houses the motor, the centrifugal fan, and the air collecting member, and ventilation windows formed in the housing to communicate between the inside and the outside of the housing on the outer side of the centrifugal fan. The air collecting member is provided with wall bodies positioned on the inner side of the ventilation windows. | 01-29-2015 |
20150020391 | Power Tool with High-Speed Electric Motor - A hand-held power tool includes a motor having a stator and a rotor, the motor being configured to rotate the rotor at a speed of at least 40,000 rpm, an output shaft directly driven by the rotor, a tool accessory shaft configured to support a tool accessory, and a two-stage speed reducing transmission operably connecting the output shaft to the tool accessory shaft. The two-stage speed reducing transmission is configured to drive the tool accessory shaft at a rate less than the rotor speed, for example, at a rate less than or equal to 37.5% of the rotor speed. | 01-22-2015 |
20140374131 | POWER TOOLS - A power tool has a continuously variable transmission, a condition detection device, and an operation control device. The continuously variable transmission changes a velocity of a rotational output from a drive motor and outputs the rotational output to a spindle to which a tip end tool is mounted. The condition detection device detects a condition of the power tool. The operation control device determines a target RPM of the spindle based on the condition of the power tool detected by the condition detection device, and controls an RPM of the drive motor and/or a transmission gear ratio of the continuously variable transmission based on the target RPM. | 12-25-2014 |
20140356665 | BATTERY PACK - A battery pack may include a drainage device provided at a bottom portion of the housing case. The drainage device may include a drain hole communicating between the inside and the outside of the housing case, so that water introduced into the housing case is discharged to the outside of the housing case. The drainage device may be disposed between two of the terminal members that are connected to electrodes of the battery cells. | 12-04-2014 |
20140352160 | VEGETATION CUTTER - A vegetation cutter comprises: a frame rod having a longitudinal axis and a front end; a rotary cutter mounted on the front end of the frame rod; a drive motor for driving the rotary cutter; a grip disposed around the frame rod and having an external surface to be held by a user; a power switch trigger arranged on the grip for energizing the drive motor; and a safety lock mechanism for rendering the power switch trigger inoperative when the safety lock mechanism is in a lock position and for rendering the power switch trigger operative when the safety lock mechanism is in a release position. The safety lock mechanism includes a manipulating knob for selectively setting the safety lock mechanism in the lock position and in the release position. The manipulating knob is disposed on the grip at a position circumferentially opposite to the power switch trigger and is turnable around an axis which is parallel to the longitudinal axis of the frame rod to selectively bring the safety lock mechanism to the lock position and the release position. | 12-04-2014 |
20140349143 | Battery Pack for Use with Hand-Held Electric Power Tool - A battery pack ( | 11-27-2014 |
20140334270 | DEVICE FOR MOTOR-DRIVEN APPLIANCE - A device for a motor-driven appliance includes a communication unit, a date/time information acquisition unit, and a control unit. The communication unit performs communication with an external appliance having a date/time information indicating a current date and time. The date/time information acquisition unit acquires the date/time information from the external appliance via the communication unit. The control unit performs control based on the date/time information acquired by the date/time information acquisition unit. | 11-13-2014 |
20140331506 | RECIPROCATING CUTTING TOOL - A jigsaw includes a motor, a rod having a blade attached thereto, a power transmission portion that converts rotation transmitted from the motor to vertical movement of the rod to vertically move the blade, and a counterweight that moves vertically in a direction of the vertical movement of the rod outside a range of the vertical, movement of the rod and the blade. At least a part of the counterweight is disposed so as to cross an extended line of a trajectory of the vertical movement of the rod. The counterweight moves vertically independently of the vertical movement of the rod which is produced by the power transmission portion. | 11-13-2014 |
20140318517 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - A stratified scavenging two-stroke engine includes: an intake passage that connects an intake opening through an outer surface of a cylinder member with an intake port opening to the inside of a cylinder, and supplies gaseous mixture of fuel and air; an exhaust passage that connects an exhaust outlet opening through the outer surface of the cylinder member with an exhaust port opening to the inside of the cylinder, and discharges combustion gas; a scavenging passage; and an air passage that connects an air inlet opening through the outer surface of the cylinder member with the scavenging passage and supplies pre-scavenging air into the scavenging passage. The intake and the air inlet are arranged at positions opposite from the exhaust port across the axis of the cylinder, and arranged side by side in a substantially circumferential direction of the cylinder or a direction substantially perpendicular to the axis of the cylinder. | 10-30-2014 |
20140318515 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - An air-leading type, stratified scavenging two-stroke engine. The engine including a cylinder member and a crankcase joined therewith has an intake passage, an exhaust passage, first and second scavenging passages, a communicating portion and an air passage. The intake passage, the exhaust passage and the air passage are formed in the cylinder member. The first and the second scavenging passages each has a cylinder member-side passage and a crankcase-side passage. The cylinder member-side passages of both of the first and the second scavenging passages communicate with each other via the communicating portion. The air passage is connected to the cylinder member-side passage of the first scavenging passage. In the engine, air for pre-scavenging is introduced from the air passage through a check valve into the cylinder member-side passage of the first scavenging passage, and a part of the introduced air flows into the second scavenging passage through the communicating portion. | 10-30-2014 |
20140312721 | ELECTRIC POWER TOOL INCLUDING A PLURALITY OF CIRCUIT BOARDS - An electric power tool, which uses a DC brushless motor as a drive source and controls the DC brushless motor by a switching element, can include a tubular housing main body portion accommodating the DC brushless motor, and a grip portion protruding from a side portion of the housing main body portion. The switching element is arranged inside the grip portion, and is spaced apart from an electronic circuit board for an electronic component for operating the switching element. | 10-23-2014 |
20140304939 | DUST COLLECTOR INTERLOCKING SYSTEM - A dust collector interlocking system includes a transmitter provided in the electric power tool and capable of transmitting a radio signal, and a receiver provided in the suction hose of the dust collector and capable of receiving the radio signal from the transmitter of the electric power tool. The transmitter transmits a drive signal of the electric power tool, and the receiver receives the drive signal of the electric power tool from the transmitter to turn on a start switch of the dust collector. | 10-16-2014 |
20140302353 | POWER TOOL BATTERY PACK - A power tool battery pack includes a lower side case, an upper side case fixed to the lower side case, a battery cell in the lower side case and a circuit board connected to the battery cell. A plurality of electrical signal terminals are arranged in parallel on the circuit board, and the circuit board includes at least one slit between adjacent pairs of the plurality of signal terminals to make it difficult for any water that reaches the circuit board to electrically short two of the signal terminals together. Alternately or in addition, a wall structure may be provided between the terminals for reducing the likelihood that water reaching one of the signal terminals will be able to electrically connect two of the signal terminals. | 10-09-2014 |
20140300366 | ELECTRICAL DEVICE SYSTEM AND BATTERY PACK - An electrical device system having a battery pack, an electrical device, and a charging device, includes: a current detecting unit that detects a battery current flowing through the battery during a charge to or a discharge from the battery; a battery state detecting unit that detects at least one of a battery voltage and a temperature of a heat generating unit; and a determining unit that estimates an amount of change in at least one of the battery voltage and the temperature of the heat generating unit, based on the battery current, and calculates an amount of actual change in at least one of the battery voltage and the temperature of the heat generating unit, wherein the determining unit determines that the current detecting unit is abnormal, when the difference between the calculated amount of actual change and the estimated amount of change is a default value or more. | 10-09-2014 |
20140292245 | MOTOR-DRIVEN APPLIANCE SYSTEM AND METHOD FOR CONTROLLING THE SYSTEM - A motor-driven appliance system in one aspect of an embodiment of the present disclosure includes a motor-driven appliance having a motor, at least one control circuit, and a communication device. The control circuit is configured to execute a process related to control of the motor-driven appliance. The communication device is configured to communicate with an external device. The control circuit is further configured to switch, when at least one predetermined sleep condition is satisfied, from an active mode in which the control circuit performs a normal operation to a sleep mode in which the control circuit stops part of the normal operation to thereby suppress power consumption; and to switch to the active mode when the communication device receives an external wakeup signal transmitted from the external device while the control circuit is in the sleep mode. | 10-02-2014 |
20140290076 | CHAIN TENSION ADJUSTING APPARATUS FOR CHAIN SAW - In a chain saw, an operating shaft member axially rotated by a manual operation of a rotating lever is disposed so that an axial direction thereof may be inclined against an attaching surface of a guide bar in which a saw chain is wound around a circumference thereof, a driving bevel gear attached to an end portion of the operating shaft member meshes with a driven bevel gear attached to an end portion of a rotating shaft member, and the rotating shaft member is axially rotated. Thus, the guide bar is moved in a longitudinal direction thereof to adjust tension of the saw chain. | 10-02-2014 |
20140290075 | GUIDE BAR FASTENING DEVICE FOR CHAIN SAW - To provide an operation lever including a first lever that has a base end portion swingably supported to a peripheral portion of a nut member for fastening a guide bar in a chain saw, and a second lever that is engaged with the first lever in a manner slidable in an axial direction. The operation lever can be placed in a receiving portion of the nut member with an axial length thereof shortened, and can be manipulated to rotate the nut member by being gripped on an outer end portion of the second lever in a state in which the operation lever is lifted out from the receiving portion and the axial length is lengthened. Thus, a sufficient fastening force for the guide bar can be obtained, and operability can be improved. | 10-02-2014 |
20140290074 | PORTABLE WORKING MACHINE - A portable working machine according to the present invention has a cover member detachably attached to a working machine body, includes a bolt member vertically provided to a working machine body, a detachable cover member having a through-hole and attached to the working machine body by inserting the bolt member through the through hole, a fixing member which is screwed with the bolt member and fixes the cover member to the working machine body, and a holding member which is attached to an outer surface of the cover member while having a predetermined gap space between the holding member and the outer surface of the cover member and holds the fixing member on an outer side of the cover member to prevent drop of the fixing member of which fastening to the bolt member is released. | 10-02-2014 |
20140266071 | BATTERY PACK AND BATTERY CHARGER - A battery pack includes: a connecting portion connected to a battery charger; a battery chargeable by the battery charger connected to the connecting portion; an environment temperature detecting element detecting an environment temperature around the battery; and a control circuit. The control circuit periodically detects the environment temperature via the environment temperature detecting element and controls the battery charger to suspend starting of charging the battery or to temporarily discontinue charging the battery when a variation of the environment temperature detected exceeds a predetermined range, when the battery charger is connected to the connecting portion. | 09-18-2014 |
20140251650 | POWER TOOL AND POWER TOOL ACCESSORY MEMBER - A power tool includes a motor unit, a main body portion, a grip portion and a female thread part. The main body portion accommodates the motor unit therein. The grip portion extends from the main body portion. The female thread part is retained to the main body portion. The female thread part includes a female thread configured and arranged to engage with a male thread of a male thread part of a power tool accessory member. | 09-11-2014 |
20140251649 | POWER TOOL ASSEMBLY, POWER TOOL, AND AUXILIARY HANDLE MEMBER - A power tool assembly includes a power tool and an auxiliary handle member. An outer surface of a main body portion of the power tool includes first and second engagement structures. A fixing portion of the auxiliary handle member is fixed to the main body portion of the power tool with the fixing portion surrounding more than 180 degree of a circumference of the main body portion when viewed along a longitudinal axis of the main body portion. The fixing portion includes a first arm part with a first engagement section engaging with the first engagement structure and a second arm part with a second engagement section engaging with the second engagement structure. The first arm part and the second arm part are movable relative to each other to change a distance between the first engagement section and the second engagement section. | 09-11-2014 |
20140251293 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - A two-stroke engine is provided with a scavenging passage that extends between a scavenging intake that opens into a crankcase and a scavenging port that opens into a cylinder, and an air passage that is connected to an intermediate position of a scavenging passage for introducing air into the scavenging passage. A first check valve that is disposed within a section of a scavenging passage between a scavenging intake and the intermediate position. A second check valve that is disposed within the air passage. The section of the scavenging passage between the intermediate position and the scavenging intake, the air passage, and a mixture gas passage are arranged in a substantially same direction with respect to a longitudinal axis of the cylinder. | 09-11-2014 |
20140230211 | POWER CUTTER - A power cutter includes a housing, a first return pulley borne in a rotating manner in the housing and driven directly by a motor arranged in the housing, a cutting arm connected to the housing has a housing in which a second return pulley is arranged in a rotating manner, and is driven by a tension means guided over the first return pulley and the second return pulley, as well as a cutting tool which can be detachably fastened to the cutting arm, and a method of changing the position of a cutting tool of a power cutter, through which handling during changing the position of the cutting tool can be simplified. For the detachable fastening of the cutting tool, the cutting tool is borne on a shaft, whereby the shaft can be detachable fastened to two opposite sides of the second return pulley. | 08-21-2014 |
20140217934 | MOTOR-DRIVEN APPLIANCE AND BATTERY PACK - A motor-driven appliance includes a battery; a motor including permanent magnets as field magnets; a momentary maximum current upper limit storage unit in which a predetermined momentary maximum current upper limit is stored; a current detection unit that detects a current flowing in the motor; a current threshold setting unit that generates a current threshold based on the momentary maximum current upper limit, and outputs the generated current threshold; a current exceedance determination unit that determines whether the current detected by the current detection unit has become equal to or greater than the current threshold, and outputs an interruption signal used to interrupt a current path from the battery to the motor when the detected current has become equal to or greater than the current threshold; and a current flow interruption unit that interrupts the current path when the interruption signal is outputted from the current exceedance determination unit. | 08-07-2014 |
20140215839 | POWER TOOL, SUCH AS A PORTABLE CIRCULAR SAW, HAVING IMPROVED BRAKING AND COOLING - A power tool, for example, a portable circular saw, includes a fan, a motor configured to rotate the fan, an output part or shaft driven by the motor, a motor housing that houses the motor, a grip housing connected to the motor housing, a trigger associated with the grip housing, and a brake member configured to brake a rotation of the motor, the brake member being mounted inside the grip housing. The brake member may be a resistive element of a rheostatic braking system. The housing and fan are configured such that cooling air is directed to cool the brake member. | 08-07-2014 |
20140210379 | POWER TOOL HAVING A BRUSHLESS MOTOR AND A CONTROL UNIT FOR CONTROLLING THE BRUSHLESS MOTOR - A power tool according to one aspect of one embodiment described in the disclosure includes a brushless motor, a battery voltage detection unit configured to detect a voltage of a battery that provides energy for driving the brushless motor, a rotational position detection unit configured to detect a rotational position of the brushless motor, and a control unit configured to control a drive output supplied to the brushless motor based at least in part on a signal from the rotational position detection unit. The control unit controls a current conduction angle and/or an advance angle supplied to the brushless motor so that, during control of the drive output to the brushless motor, a rotational speed or a conducting current of the brushless motor approaches or reaches a target value, the target value being based at least in part on a battery voltage detected by the battery voltage detection unit. | 07-31-2014 |
20140208599 | WORK MACHINE HAVING OPERATION ROD - A work machine includes a motor and a sensor disposed in a front unit, a motor controller disposed in a rear unit, a motor power line and a sensor signal line disposed along an operation rod, and a pair of electric connectors. The motor power line includes first and second partial motor power lines disposed along the first and second partial rods respectively. The sensor signal line includes first and second partial sensor signal lines disposed along the first and second partial rods respectively. A first electric connector includes first electric terminals, each of which is coupled with corresponding one of the first partial motor power line or the first partial sensor signal line, and a second electric connector includes second electric terminals, each of which is coupled with corresponding one of the second partial motor power line or the second partial sensor signal line. | 07-31-2014 |
20140202277 | TRIGGER SWITCH - A trigger switch has a case member, a cover member, and an operation member configured to be used to carry out an operation. The case member and the cover member are combined with each other to form a waterproof case. When the operation member is operated, the operation member is displaced inward of the waterproof case. An internal pressure of the waterproof case changes in accordance with displacement of the operation member. The case member has a case base that is made from an inelastic body. The case base does not deform in accordance with a change in internal pressure of the waterproof case. The case base has at least one hole part. The case member has at least one deformation section that seals the at least one hole part. The deformation section is made from an elastic body. | 07-24-2014 |
20140197803 | CHARGING APPARATUS - A charging apparatus includes: a charging unit charging a rechargeable battery; a fan to send air to the rechargeable battery; a control unit adapted to activate the fan when a predetermined cooling-execution condition is satisfied after initiation of charging the rechargeable battery by the charging unit and to deactivate the fan when a predetermined maximum cooling period of time is elapsed from completion of charging the rechargeable battery by the charging unit even when the predetermined cooling-execution condition has been satisfied after completion of charging the rechargeable battery by the charging unit; an information obtaining unit configured to obtain cooling-performance information that represents coolability of the rechargeable battery; and a setting unit configured to set the maximum cooling period of time based upon the cooling-performance information obtained by the information obtaining unit. | 07-17-2014 |
20140197780 | CHARGING APPARATUS FOR SECONDARY BATTERY - A charging apparatus for a secondary battery comprises: a power supply circuit connected to a primary winding | 07-17-2014 |
20140196921 | POWER TOOL AND AUXILIARY HANDLE MEMBER - A power tool includes a main body portion and a grip portion. The main body portion includes a motor unit. The grip portion extends from the main body portion between a front end and a rear end of the main body portion. The main body portion further includes an auxiliary handle mounting structure disposed between the rear end of the main body portion and a rearmost end of a region where the grip portion meets the main body portion. An auxiliary handle member is coupled to the auxiliary handle mounting structure of the main body portion. | 07-17-2014 |
20140191481 | POWER TOOL HAVING IMPROVED TOOL ACCESSORY SECURING MECHANISM - A power tool includes a clamp shaft for clamping a tool accessory to the power tool and a clamp shaft holding mechanism for selectively locking the clamp shaft to hold the clamp shaft in a position that secures the tool accessory on the power tool. The power tool also includes a lever for shifting the clamp shaft holding mechanism between clamped and unclamped states. The lever is configured such that when an operator grasps the lever and moves it toward a position for releasing the tool accessory, the lever and the operator's hand move away from the tool accessory. | 07-10-2014 |
20140190718 | RECHARGEABLE ELECTRIC TOOL - The present invention provides a rechargeable electric tool in which a battery pack detachably mounted to a mounting part, which is formed lower than an opening provided at a housing, wherein a seal member is held in the housing to seal between the opening and the battery pack mounted to the mounting part. A projection projecting toward the opening side is provided at the seal member, and a passing hole that penetrates the projection and the seal member and allows a lead line connecting an electric component accommodated on the opening side in the housing to the battery pack to pass therethrough is formed. | 07-10-2014 |
20140190716 | ELECTRIC POWER TOOL - It is an object to provide an electric power tool with improved workability in a dark place. In an electric power tool that includes a housing extending in a longitudinal direction and accommodating a motor, a spindle driven by the motor and protruding downward from a front end of the housing, and a distal end tool coupled to an end of the spindle, a light-emitting diode (LED) capable of emitting light downward is provided in an upper part of a front of the housing. The LED is disposed rearward of a front end face of the housing in the longitudinal direction. | 07-10-2014 |
20140183075 | Tool Housing Case and Subcase - A tool housing case includes a main body case, for holding a power tool, for example, and an accessory case, for holding a power tool accessory, for example, which accessory case is connectable to the main body case on a handle side of the main body case near a main body case handle. The accessory case has an opening that can be selectively closed by a cover element. A space is provided between the handle and the accessory case for receiving a user's hand when the handle is gripped, and when a user's hand is not gripping the handle, this space allows access to the accessory case. | 07-03-2014 |
20140182869 | IMPACT TOOL - An impact driver or impact tool includes a motor, a motor housing that houses the motor, a grip housing integrally provided with the motor housing, a hammer case is disposed frontward of the motor housing, a spindle rotated by the motor, a hammer housed inside the hammer case and configured to be rotated by the spindle, and an anvil housed inside the hammer case which anvil is configured to be impacted by the hammer. In this impact driver, a length from a rear end of the motor housing to a front end of the anvil (i.e., the front-rear length of a main body) is less than 128 mm. | 07-03-2014 |
20140182571 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - A stratified scavenging two-stroke engine includes a first scavenging passage that extends from a first scavenging intake that opens to the inside of the crankcase to a first scavenging port that opens to the inside of a cylinder, and a second scavenging passage that extends from a second scavenging intake that opens to the inside of the crankcase to a second scavenging port that opens to the inside of the cylinder. The first and second passages are formed so as to communicate with each other via a communicating portion. An air passage is connected to the first passage at a position closer to the first scavenging intake than the communicating portion. A first check valve inhibits a flow from the first passage to the inside of the crankcase, and a second check valve inhibits a flow from the first passage through the air passage to the outside. | 07-03-2014 |
20140181167 | RANDOM NUMBER GENERATING DEVICE - A random number generating device includes a processing request part, a receiving part, a counting part, and a random number generation part. The processing request part makes a request for a predetermined processing to a processing requested object. The receiving part receives a response from the processing requested object in response to the request. The counting part performs a counting operation to increase or decrease a count value with a predetermined cycle, the counting operation being started at least prior to receipt of the response. The random number generation part acquires at least one count value of the counting part at least one predetermined acquisition timing after the receipt of the response is started, and generates a random number by using the at least one count value that is acquired. | 06-26-2014 |
20140175721 | MOTORISED DEVICE WITH A MOTOR MOUNTING - In order to provide a motorised device, more particularly a hand-held tool such as a chainsaw, an angle grinder and/or a hand-held green space maintenance unit, with an combustion motor, which is envisaged for driving a tool of the motorised device and which is housed in a motor mounting with an improved motor mounting, which is simple to manufacture and allows flexible holding of different combustion motors in a motorised device, it is proposed that the motor mounting is designed as a plastic motor mounting and has a metal support frame which is overmoulded with the plastic material of the plastic motor mounting. | 06-26-2014 |
20140174871 | HAMMER DRILL - In a hammer drill, a coil spring that urges a first clutch and a second clutch in directions away from each other is held between a first change plate that engages with the first clutch to be slidable in the axial direction of an intermediate shaft and a second change plate that engages with the second clutch to be slidable in the axial direction of the intermediate shaft. The first change plate is slidably guided by a gear housing. | 06-26-2014 |
20140165946 | POWER TOOL - To attain further rationalization in a power tool in which a tool bit is driven by an engine. During driving of the saw chain, when the user returns a throttle lever to its initial position by releasing only the throttle lever while keeping pressing a throttle lock lever, or when the user returns the throttle lever to the initial position by releasing the throttle lever and releases the throttle lock lever, driving of an engine is stopped. Thus, further rationalization can be attained in the power tool. | 06-19-2014 |
20140165525 | MOTOR DRIVE DEVICE AND ELECTRIC MOWING MACHINE - A motor drive device according to one aspect of the present invention includes an operation switch, a control unit, an adjusting unit, and a normal/reverse changeover switch. The control unit is configured, in a case where the operation switch is in an on state, to control a current flowing to the motor based on a control target value adjusted by the adjusting unit when a rotational direction of a motor is set to a normal direction by the normal/reverse changeover switch; and to control the current flowing to the motor based on a preset fixed reverse rotation control target value used to reversely rotate the motor, regardless of the control target value set by the adjusting unit, when the rotational direction is set to a reverse direction by the normal/reverse changeover switch. | 06-19-2014 |
20140165412 | WORK MACHINE HAVING OPERATION ROD - A work machine includes an operation rod, a front unit disposed at a front end of the operation rod and configured to attach a tool, a rear unit disposed at a rear end of the operation rod and configured to attach a battery, a brushless motor disposed in the front unit and configured to drive the tool, a motor controller disposed in the rear unit and electrically coupled with the battery, and a plurality of motor power lines disposed along the operation rod and configured to electrically couple the motor controller with the brushless motor. | 06-19-2014 |
20140159920 | ADAPTER FOR POWER TOOLS, POWER TOOL SYSTEM AND METHOD FOR WIRELESSLY COMMUNICATING MAINTENANCE INFORMATION THEREFOR - An adapter for a power tool powered by a detachable battery pack which adapter includes a connector configured to detachably connect the adapter directly to the power tool, an adapter controller, at least one memory and/or storage device in communication with the adapter controller and configured to store maintenance information concerning the battery pack or to store maintenance information concerning the battery pack and the power tool, at least one communication port configured to transmit electrical communications, including said maintenance information, from the adapter controller to a controller located in the power tool and vice versa, and a transmitter configured to wirelessly transmit the maintenance information to an external device. | 06-12-2014 |
20140159919 | Adapter for Power Tools, Power Tool System and Method of Operating the Same - An adapter for a power tool powered by a detachable battery pack includes a connector for directly connecting the adapter only to the power tool in a detachable manner, a controller, at least one memory and/or storage device in communication with the controller, and at least one communication port configured to transmit electrical communications from the adapter controller to a controller located in the power tool and vice versa. The adapter is further configured such that, when a battery pack, which also includes a controller, is connected to the power tool, a communication path is established from the battery pack controller to the adapter controller via the power tool controller. | 06-12-2014 |
20140159662 | PORTABLE BATTERY PACK CHARGING SYSTEM, METHOD FOR RECHARGING A BATTERY PACK, AND ADAPTER THEREFOR - A method for recharging a battery pack includes attaching a portable charger to a user, which portable charger includes or is attached to a self-contained power supply and wherein a first charging port of the portable charger is disposed, e.g., on a belt worn by the user, hanging the battery pack on the belt while the battery pack is physically engaged and in electrical communication with a power tool, and initiating a transfer of power from the charger to the battery pack when the first charging port is at least proximal to a second charging port that is in electrical communication with at least one battery cell of the battery pack. A portable charging system capable of performing this method, as well as an adapter for use in performing this method, are also disclosed. | 06-12-2014 |
20140159640 | CHARGER FOR HAND-HELD POWER TOOL, POWER TOOL SYSTEM AND METHOD OF CHARGING A POWER TOOL BATTERY - A charger for a hand-held power tool includes a power source interface, a charger base and a charging cradle rotatably supported on the charger base. The rotatable charging cradle includes at least two charging output terminals electrically connected to the power source interface. A power tool system includes the charger and the hand-held power tool. A method of charging the power tool system includes contacting charging input terminals of the power tool with the charging output terminals, rotating the charging cradle and the power tool relative to the charging base and supplying charging current to at least one battery cell while the charging cradle and the power tool are allowed to freely swing relative to the charging base. | 06-12-2014 |
20140158389 | THEFT-DETERRENCE SYSTEM FOR POWER TOOL SYSTEM, AND ADAPTER AND METHOD THEREFOR - A power tool system includes a hand-held power tool having a motor or a solenoid that drives a tool, and a first memory that stores at least one pass code. A battery pack is detachably attached to, and supplies current to, the power tool and has a second memory that stores at least one pass code. An electronically-actuatable lock and a first controller are provided in the power tool and/or in the battery pack. The first controller reads the pass codes from the first and second memories when the battery pack is attached to the power tool, directly compares the pass codes from the first memory and the second memory, and causes the first electronically-actuatable lock to prohibit or impair operation of the power tool when the pass codes do not match or otherwise correspond in a predetermined manner. | 06-12-2014 |
20140151079 | POWER TOOL SYSTEM AND ADAPTER THEREFOR - A power tool system includes a hand-held power tool having a housing with a battery pack interface, an electrically-driven device and a first connector. A battery pack is detachably attached to the battery pack interface and supplies current to the electrically-driven device. An adapter has a second connector physically and electrically connected with the first connector in a detachable manner. The adapter receives power from the battery pack via the hand-held power tool and provides at least one additional electrical function to the hand-held power tool or performs at least one additional electrical function that the hand-held power tool is not otherwise capable of performing. Further, the adapter is at least partially disposed in a space defined in part by the housing and in part by the battery pack when the housing and battery pack are attached to each other. | 06-05-2014 |
20140147718 | HAND-HELD POWER TOOLS AND BATTERY PACKS THEREFOR - A battery pack adapted to be attached to, and drive, a hand-held power tool includes a plurality of series-connected battery cells having a nominal power output of at least 300 Watts. The battery pack weighs less than 275 grams and has a nominal power output to weight ratio of at least at least 1100 Watts/kilogram. A power tool system or kit includes such a battery pack and a hand-held, battery-powered tool adapted to operate with a battery pack having a nominal power output of 600 Watts or more. | 05-29-2014 |
20140147252 | POWER TOOL - A power tool having a built-in fan, the fan including a plurality of blades at uneven pitches. The fan includes a centrifugal fan which blows out air in all radial directions. The fan is provided with means for correcting unstable outflow which may be caused by the uneven pitches between the blades. The blades have unevenly configured inducers for correcting unstable outflow. | 05-29-2014 |
20140138112 | IMPACT TOOL - A hammer drill serving as an impact tool is provided with a crank housing that accommodates a crankshaft, and a cylinder accommodated in the crank housing. Receiving portions that receive the cylinder which is pressed rearward are provided at multiple locations of the crank housing in the front-rear direction. At least one of the receiving portions is disposed to receive the rear-end portion of the cylinder. A portion of the cylinder, which is received by another one of the receiving portions is a circlip (circumferential member) made of a metal. | 05-22-2014 |
20140125256 | VARIABLE SPEED SWITCH AND ELECTRIC POWER TOOL WITH THE VARIABLE SPEED SWITCH MOUNTED THERETO - A variable speed switch includes a switch main body portion which is accommodated in a housing of an electric power tool and mounted to the housing so as to be capable of relative movement, and a load sensor which is provided in the switch main body portion and capable of outputting an electric signal in proportion to the amount of distortion caused by a pressing force. The switch operating portion is mounted on the surface of the housing so as to be capable of relative displacement with respect to the housing and transmits a pressing force applied to the switch operating portion to the load sensor, with the maximum displacement amount of the switch operating portion being set to equal to or less than 5 mm. | 05-08-2014 |
20140116741 | PORTABLE POWER TOOL - A power tool is provided with a prime mover which causes the tool to rotate and a housing which houses the prime mover. In a back-end face that is positioned on an opposite side on the housing from a tool side, a back-end groove, into which a user can position his/her web between his/her thumb and forefinger, is formed. A pair of side-face grooves, into which the user can place the thumb and forefinger, are formed in both side faces of the housing. A depth changing portion is formed in at least one of the side-face grooves, such that the depth is reduced toward the back-end face of the housing. According to this structure, even when the housing is gripped directly from the back-end face, the user can easily draw up or raise the power tool. | 05-01-2014 |
20140096986 | POWER TOOL - A chain saw as a power tool includes a combustion engine and an electric motor. The chain saw has a driving shaft which drives a saw chain, a battery pack which provides electric current to the electric motor, a controller which is connected to the battery pack, and a sensor which detects a driving state of a driving mechanism including the combustion engine and the electric motor. In the chain saw, the saw chain is driven in a hybrid driving mode in which both the combustion engine and the electric motor drive the driving shaft. Further, the controller controls a driving of the combustion engine based on a detection result of the sensor. | 04-10-2014 |
20140091648 | ELECTRIC POWER TOOL - In an electric power tool in which an electric motor is mounted in a housing that has a half-split structure, positions of middle screw fastening portions when a left housing and a right housing are fixed to each other by screws are located between a front protruding coil portion and a rear protruding coil portion. In other words, the protruding coil portions are located on either the front side or the rear side of the position of middle screw fastening portions when the left and right housings are fixed to each other by the screws. Accordingly, it is possible to effectively utilize a dead space that is likely to be formed between the front protruding coil portion and the rear protruding coil portion. | 04-03-2014 |
20140087236 | BATTERY PACK INCLUDING A SHOCK ABSORBING DEVICE - One aspect according to the present invention includes a battery pack and a shock absorbing device interposed between a battery cell holder and a case body and capable of keeping the battery cell holder and the battery cells not to directly contact with an inner surface of the case body. | 03-27-2014 |
20140084704 | POWER TOOL - A chain saw as a power tool which has an engine and an electric motor is provided. The chain saw includes a driving shaft which is adapted to drive a saw chain, a controller which controls the electric motor, and a driving source which provides current to the electric motor. Further, the chain saw is adapted as the saw chain is drivable in a hybrid driving mode in which the engine and the electric motor drive the driving shaft simultaneously. The power source of the chain saw includes a capacitor. The capacitor is electrically connected to the controller. | 03-27-2014 |
20140083375 | POWER TOOL - A brush cutter as a power tool includes an engine, an electric motor, a driving shaft capable of driving a tool and a battery which provides current to the electric motor. The brush cutter is adapted to drive the tool in a hybrid driving mode in which both the engine and the electric motor drive the tool. Further, the engine is arranged between the electric motor and the driving shaft. | 03-27-2014 |
20140073467 | BELT DRIVE FOR A MOTOR-DRIVEN TOOL - In order to provide a belt drive for a motor-driven tool with a first, drive-side belt pulley, a second, tool-side belt pulley and a belt that can be tensioned over the first and the second belt pulley, that is characterised by being easier to use, it is proposed that a cam, rigidly connected with a shaft, is arranged in the first or second belt pulley, whereby during a rotational movement of the shaft the belt pulley can be moved from an eccentric arrangement in relation to the shaft into a concentric arrangement by way of a translational movement and a rotational movement of the belt pulley. | 03-13-2014 |
20140056738 | RECHARGEABLE FAN DEVICE - Provided is a rechargeable fan device that includes a fan; a motor that drives the fan to rotate; a battery that supplies power to the motor; a voltage generation unit that generates a control voltage of a predetermined voltage value based on DC power inputted; a first supply path used to supply DC power from the battery to the voltage generation unit; a semiconductor switch that brings the first supply path into/out of conduction; a DC jack used to input DC power from an external DC power source; a second supply path used, when the DC power is inputted into the DC jack, to supply the DC power to the voltage generation unit; and a control unit that controls driving of the motor and charging of the battery. | 02-27-2014 |
20140055084 | CHARGER - A charger in one aspect of the present invention includes: a connecting portion, two protection devices, a charging device, a control device, and a voltage detection device. A first protection device is configured such that its power consumption in a charging inhibited state is lower than that in a charging permitted state. A second protection device is configured such that its power consumption in the permitted state is lower than that in the inhibited state. The control device is configured to respectively set, when the battery is not connected to the connecting portion, the first protection device to the inhibited state and the second protection device to the permitted state, and thereafter switch, when the voltage value of the charging path detected by the voltage detection device is equal to or greater than a predetermined specified voltage value, the second protection device to the inhibited state. | 02-27-2014 |
20140053420 | RECIPROCATING SAW - In a reciprocating saw, a slider that is reciprocated by a motor protrudes forward beyond a housing accommodating the motor. A blade that cuts a workpiece can be fixed to a joining portion provided at a tip end of the slider. A protector made of an elastic material is attached to the joining portion. The protector is provided with a contact portion capable of contacting the blade fixed to the joining portion. | 02-27-2014 |
20140026863 | ENGINE - An engine includes: a piston; a carburetor having a diaphragm fuel pump, the diaphragm fuel pump including a pump chamber configured to suck and discharge fuel and a diaphragm chamber to which a pressure to drive the pump chamber is applied; and a communicating passage configured to connect between the diaphragm chamber and a negative pressure part in which a negative pressure is created due to movement of the piston. A flowback prevention part is formed in the communicating passage to allow fluid to move only in on direction from the diaphragm chamber to the negative pressure part. | 01-30-2014 |
20140024298 | ABRASIVE CUTTING MACHINE - An abrasive cutting machine includes a housing and a cutting arm on which a cutting tool is accommodated on the end side. The cutting tool is driven via a belt by an engine of the abrasive cutting machine, and the housing encompasses a fan chamber for accommodating a fan wheel by which an air flow is provided. A belt chamber for accommodating the belt is embodied in the cutting arm, with improved durability of a belt, in particular the dust exposure of the belt for power transfer from the engine to the cutting tool. Provision is made between the fan chamber and the belt chamber for an air duct, through which at least a part of the air flow, which is created by the fan wheel, reaches from the fan chamber into the belt chamber, so as to apply a sealing air flow to the belt chamber. | 01-23-2014 |
20140020922 | DUST COLLECTING DEVICE AND IMPACT TOOL - In a dust collection device that collects dust particles that an impact tool generates, disclosed is a feature that can accommodate the lengths of tool bits that are mounted to the impact tool when a machining operation is executed by exchanging tool bits of different lengths. The dust collection device collects dust that the impact tool generates and is attached to said impact tool that, in the lengthwise direction, linearly operates the tool bit mounted to the end region of a tool body. The dust collection device has a dust intake port that sucks dust, and said dust intake port can be repositioned in the lengthwise direction of the tool bit in accordance with the length in the lengthwise direction of said tool bit. | 01-23-2014 |
20140001890 | BRUSHLESS MOTOR FOR ELECTRIC POWER TOOL | 01-02-2014 |
20130340261 | JIGSAW - A jigsaw includes a housing, a motor, a blade, a roller holder and a dust collection passage. The housing accommodates the motor. The blade driven by a motor protrudes downward from a front part of the housing and moves in a reciprocating manner to cut a workpiece. The roller holder is pivotally arranged under the housing and holds a roller that is arranged between a pair of side walls facing each other. The roller abuts on a rear part of the blade. The dust collection passage formed through the housing has a dust collection port that opens behind the roller holder. The jigsaw further includes a dust collection nozzle that has a vertically long opening formed on a front face and a rear face thereof respectively, the opening on the front face being connected to the dust collection port. | 12-26-2013 |
20130335013 | ELECTRIC POWER TOOL POWERED BY A PLURALITY OF RECHARGEABLE BATTERY CELLS - An electric power tool is powered by a plurality of rechargeable battery cells and configured to removably receive respective rechargeable battery cells individually. The electric power tool may preferably include a monitor circuit that monitors states of respective battery cells, and an indicator circuit that indicates the states of the respective battery cells monitored by the monitor circuit. Especially, the monitor circuit may preferably monitor output voltages of the respective rechargeable battery cells and the indicator circuit may preferably indicate whether the detected output voltages are within a predetermined range. | 12-19-2013 |
20130333228 | CUTTING TOOL - In a portable cutting tool configured to perform a cutting operation through movement along the upper surface of a workpiece, when an ordinary inner rotor type motor is used as the drive source, the motor is rotated at high speed to obtain a high output, which is reduced in speed by a speed reduction device to thereby secure an appropriate rotational speed for a rotary cutter. Since the electric motor is rotated at high speed in this construction, there have been problems of noise, vibration, etc. The present invention aims to achieve a reduction in the noise and vibration of the cutting tool. | 12-19-2013 |
20130328460 | ELECTRIC POWER TOOL - An electric power tool of an embodiment of the present invention uses a motor provided with a yoke as a drive source, and is configured such that an end portion of an electric component mounted on a drive circuit of the motor is electrically connected to the yoke of the motor through a conductive elastic body. | 12-12-2013 |
20130319789 | TWO-STROKE ENGINE COMPRISING A MUFFLER - The invention relates to a two-stroke engine for an engine-driven tool, including a muffler, especially for a manually operated engine-driven tool such as a maintenance device for gardens or green spaces, for a hand-held tool such as a chain saw, a hand-held circular saw or an angle grinder or for a small motorcycle, a boat engine and the like, wherein the flow channel between the muffler inlet and the first chamber is formed so as to promote flow such that the exhaust gas entering the muffler inlet mainly enters the first chamber due to its inertia and once the first chamber is full flows back again. The counterpressure of the exhaust gas is produced at a point in time in which the piston releases the outlet and the fuel-air mixture at least for its most part has entered the combustion chamber through the at least one transfer passage. | 12-05-2013 |
20130318799 | ELECTRICALLY POWERED GARDEN TOOL - An electrically powered garden tool includes an electric motor mounted upright within an outer shell housing, a pair of relatively reciprocating shear blades assembled to be driven by operation of the motor through a crank mechanism provided within a lower portion of the outer shell housing, and a cooling fan assembled to be driven by operation of the motor for introducing outside air into an upper portion of the outer shell housing to exhaust the introduced air from a lower portion of the outer shell housing. In the garden tool, a downward exhaust opening is formed within a lower end peripheral wall of the outer shell housing enclosing the crank mechanism such that the air spouted by rotation of the cooling fan blows out downward from the downward exhaust opening to restrain the occurrence of blowing noise of the air. | 12-05-2013 |
20130314007 | ELECTRIC POWER TOOL - An electric power tool is provided with a three-phase brushless motor that drives a tool and a motor driver that drives the three-phase brushless motor with square voltage waves. The motor driver is able to set a conduction angle to a value that is equal to or more than 130 degrees but not more than 180 degrees, and especially to change the conduction angle among at least two values that are equal to or more than 130 degrees but not more than 180 degrees. In this configuration, it may be preferable that the conduction angle is set to a larger value as a load applied to the tool becomes smaller. On the other hand, it may be also preferable that the conduction angle is set to a larger value as a load applied to the tool becomes smaller. | 11-28-2013 |
20130312213 | BACKPACK POWER APPARATUS - A backpack power apparatus is comprised of a back carrier frame for being piggybacked by a user, a blower unit including a fan driven by a drive motor for sucking in or blowing out air through an airflow duct, and an airflow tube fluidically communicating with the airflow duct of the blower unit for sucking in or blowing out air through the airflow tube. The blower unit is mounted on the back carrier frame via a vibration isolating means, and the airflow tube is supported on the back carrier frame and adapted for being held and operated by the user when in use. The airflow tube is floatingly coupled to the airflow duct of the blower unit. | 11-28-2013 |
20130306007 | DEVICE FOR PROVIDING CLEAN COMBUSTION AIR FOR THE INTERNAL COMBUSTION ENGINE OF A WORKING TOOL - In a device for providing clean combustion air for an internal combustion engine of a working tool, provision is made for a cyclone filter into which ambient air contaminated with impurities can be sucked. A partial air flow contaminated with impurities can be extracted by suction from the cyclone filter, a partial air flow substantially freed from impurities is branched off from the cyclone filter and supplied to the internal combustion engine as combustion air. A fan which provides a flow of cooling air against the internal combustion engine, is at least partially accommodated in a housing. Provision is made in the housing for at least one suction bore, which leads into the housing and provision is made in the area of the suction bore for a flow element for creating a low pressure. The partial air flow contaminated with impurities is connected to the suction bore. | 11-21-2013 |
20130300333 | APPARATUS FOR ESTIMATING QUANTITY OF STATE RELATING TO MOTOR, AND ELECTRIC TOOL - The present application discloses an apparatus including: a motor model that reflects a characteristic of a motor and includes at least inputs pertaining to a first quantity of state and a second quantity of state and an output pertaining to a third quantity of state; a comparator that calculates a difference between the third quantity of state in an actual motor and the third quantity of state output from the motor model; and an amplifier that amplifies an output of the comparator at a predetermined gain. The first quantity of state in the actual motor is input into the motor model as the first quantity of state, and an output of the amplifier is input into the motor model as the second quantity of state. The apparatus then uses the output of the amplifier as an estimated value of the second quantity of state in the actual motor. | 11-14-2013 |
20130293164 | FLUID APPARATUS - There is provided a fluid apparatus that includes a fan configured to suction or discharge a gas; a motor configured to drive the fan; a battery configured to supply electric power to the motor; a current limiting device provided on an electrical conduction path from the battery to the motor; a first drive device configured to, when receiving a drive command from outside, flow a first drive current to the motor through the current limiting device, to thereby cause normal rotation of the motor; an operation switch to be operated by a user; and a second drive device configured to, while the operation switch is being operated by the user, flow a second drive current, which is larger than the first drive current, from the battery to the motor, to thereby cause high speed rotation of the motor, | 11-07-2013 |
20130285600 | CHARGING APPARATUS - A charging apparatus for charging a battery includes: a control unit that obtains information indicating a status of the battery from the battery and controls permitting or prohibiting charging the battery depending on whether or not the obtained information satisfies a predetermined first condition; a charging detecting unit that detects whether or not the battery is being charged; a charging discontinuing unit that obtains the information indicating the status of the battery from the battery and discontinues charging the battery independently of the control by the control unit to permit or prohibit charging when the obtained information satisfies a predetermined second condition; and a diagnosing unit that inputs diagnostic information satisfying the second condition to the charging discontinuing unit in addition to the information indicating the status of the battery or as a replacement for the information indicating the battery status based upon information entered from the control unit. | 10-31-2013 |
20130284475 | POWER TOOL - To provide a hand-held power tool which is equipped with a motor and can be used in a normal driving mode for a tip end tool and also in driving modes other than the normal driving mode. A power tool in which a tip end tool is driven by a motor to thereby perform a predetermined machining process on a workpiece, wherein the motor is a dual rotor motor comprising: an inner rotor; an outer rotor; and a stator including a driving coil mechanism, with the inner rotor and the outer rotor being coaxially disposed. | 10-31-2013 |
20130280573 | BATTERY PACK - Rubber cover main bodies close opening shapes of terminal-connection openings when a battery pack is placed alone without being mounted on a tool body. When the battery pack is removed from the tool body and is placed alone, it is possible to regulate the entry of foreign materials, such as water or dust, by the rubber cover main bodies. Further, when body-side connection terminals are connected to battery-side connection terminals, the rubber cover main bodies themselves can be deformed due to elasticity according to the slide movement of the body-side connection terminals such that the body-side connection terminals can be inserted into the rubber cover main bodies. Accordingly, it is possible to protect the battery-side connection terminals in the terminal-connection openings such that the battery-side connection terminals are not damaged by regulating the entry of foreign materials from the terminal-connection openings without hindering electrical connection caused by slide mounting. | 10-24-2013 |
20130277081 | RECHARGEABLE ELECTRIC POWER TOOL - A rechargeable electric power tool includes a battery pack that is detachably provided on a housing accommodating a motor and that supplies electric power to the motor, and a tool that is driven by the motor. A standby switch and a lock-on switch are arranged at the housing. The standby switch is able to set the rechargeable electric power tool to a standby state where the rechargeable electric power tool waits for the motor to be driven. The lock-on switch is able to shift the rechargeable electric power tool from the standby state to a state where the motor is driven so as to keep the state where the motor is driven. | 10-24-2013 |
20130276314 | WORK APPARATUS - A work apparatus includes a drive motor, a tool head including a tool frame, a bearing, a tool shaft and a rotary tool, a frame tube with the proximal end connected to the drive motor and the distal end connected to the tool head, and a drive shaft rotatably inserted through the frame tube for transmitting the rotation of the drive motor to the rotary tool. The rotary tool is accommodated within the tool frame and is rotatable on the tool shaft, when driven by the drive shaft. The tool shaft is journaled by the bearing which is elastically supported by a flexible elastic member disposed coaxially around the bearing and interposed between the bearing and the connection of the tool frame or the frame tube. Undesirable vibrations caused by the rotation of the rotary tool will be effectively hindered from being transmitted to the frame tube. | 10-24-2013 |
20130271054 | ELECTRIC TOOL - An electric tool may include an electric motor, a switch operable by a user for adjusting the rotational speed of the electric motor, an operation amount detection device configured to detect the operation amount of the switch, and an operation amount indicating device coupled to the operation amount detection device and configured to indicate the detected operation amount to the user. | 10-17-2013 |
20130269497 | TABLE SAWS - A table saw includes a table capable of supporting a workpiece, a cutting unit and a positioning fence. The positioning fence has a positioning surface for supporting the workpiece. The positioning surface is divided into an upper positioning surface and a lower positioning surface that are positioned above the table. First slide fences allocated to the lower positioning surface and second slide fences allocated to the upper positioning surface are slidably supported in a table surface direction relatively independent from each other. The positioning surfaces of the first and second slide fences constitute an entire region of the positioning surface. In this way, the entire region of the positioning surface is made to be slidable in accordance with various operation modes. | 10-17-2013 |
20130265002 | CHARGER - A constant voltage power source circuit according to the present invention is configured to adjust electric power that is supplied to a microcomputer by a pulse width modulation control. The microcomputer is configured to output, to the constant voltage power source circuit, a continuous signal by which the constant voltage power source circuit continuously performs the pulse width modulation control, or an intermittent signal by which the constant voltage power source circuit intermittently performs the pulse width modulation control. | 10-10-2013 |
20130257359 | CHARGER - A charger according to the present invention includes a charging power source circuit for charging a battery, a power source control circuit that controls the charging power source circuit, a microcomputer that operates the power source control circuit, and a constant voltage power source circuit that supplies electric power to both the power source control circuit and the microcomputer. The microcomputer is configured to permit or prohibit supply of electric power to the power source control circuit from the constant voltage power source circuit to the power source control circuit. | 10-03-2013 |
20130255652 | INTERNAL COMBUSTION ENGINE, IN PARTICULAR TWO-STROKE INTERNAL COMBUSTION ENGINE - To create an internal combustion engine including a crankcase and a cylinder, wherein a piston is guided in the cylinder to perform a stroke movement and movably defines a combustion chamber, and wherein at least one transfer channel, through which ignition mixture is guided from the crankcase into the combustion chamber, is arranged in the cylinder, which leads to a further improvement of the exhaust gas quality and/or of the fuel consumption, in particular for creating an improved metering of ignition mixture into the fuel chamber, it is proposed for the piston to encompass a lower piston edge, which interacts with at least one counter body such that an inlet cross section of the transfer channel for the inflow of the ignition mixture from the crankcase into the transfer channel can be controlled by the stroke movement of the piston by the lower piston edge. | 10-03-2013 |
20130249463 | VARIABLE SPEED SWITCH - The variable speed switch according to the present invention is capable of outputting an electric signal for increasing or decreasing an amount of electric power supplied to the motor of an electric power tool according to a displacement amount of a switch-operating portion. The variable speed switch includes a wake-up contact configured to work when the switch-operating portion is operated and by which a voltage can be applied to a control circuit part of the motor to make the control circuit part in an operable state, and also includes a load sensor configured to receive a pressing force from the switch-operating portion by the displacement amount of the switch-operating portion after the operation of the wake-up contact is made and to output an electric signal according to the pressing force. | 09-26-2013 |
20130248216 | POWER TOOL - A power tool comprising a hollow pole, a prime mover disposed at one end of the pole, a tool disposed at the other end of the pole, a transmission shaft rotatably disposed within the pole and configured to transmit torque from the prime mover to the tool, a joint mechanism configured to support the tool such that the tool is capable of rotating with respect to the pole, a lock mechanism configured to selectively lock and unlock the joint mechanism, and a clutch mechanism disposed on a pathway of torque transmission from the prime mover to the tool via the transmission shaft, and configured to selectively connect and disconnect the pathway of torque transmission. The lock and clutch mechanisms are coupled with each other such that the clutch mechanism disconnects the pathway of torque transmission when the lock mechanism unlocks the joint mechanism. | 09-26-2013 |
20130244504 | TERMINAL STRUCTURE - A terminal structure provided with a male terminal and a female terminal that includes with at least one set of elastic plate parts is disclosed. The male terminal is inserted between the elastic plate parts of the female terminal in a predetermined direction to cause each side surface of the male terminal to be pressed from each side of the elastic plate part due to the elastic force of the elastic plate parts, and the male terminal and the female terminal are electrically connected to each other. A position of the surface of the male terminal with which one elastic plate is brought into contact differs, in the insertion direction of the male terminal, from a position of the other surface of the male terminal with which the other elastic plate is brought into contact. | 09-19-2013 |
20130233893 | CAULKING GUNS - An electric caulking gun may include a main body portion including a cartridge setting portion to which a cartridge containing a caulking material can be set, an electric motor disposed within the main body portion, and a push rod configured to be pressed against the cartridge for dispensing the caulking material from the cartridge. The push rod may be coupled to the electric motor so as to advance and retract along a moving path. The electric motor may extend in a right and left direction across a vertical plane including the moving path of the push rod. | 09-12-2013 |
20130233892 | CAULKING GUNS - An electric caulking gun may include a cartridge setting portion to which a cartridge containing a caulking material can be set, an electric motor, a push rod driven by the electric motor via a power transmission path and configured to be pressed against the cartridge for dispensing the caulking material from the cartridge, and an interruption device provided in the power transmission path and operable for interrupting the power transmission path and allowing the push rod to be freely moved. | 09-12-2013 |
20130230757 | BATTERY PACKS SUITABLE FOR USE WITH BATTERY POWERED APPLIANCES - Cooling air intake port ( | 09-05-2013 |
20130220659 | OSCILLATING ROTARY ELECTRIC POWER TOOL - An oscillating rotary electric power tool, in which a spindle with a distal end tool attached thereto is projected downward from a front end portion of a housing accommodating a motor, and the housing also accommodates a coupling member rotatable integrally with an output shaft of the motor, a crankshaft fitted with the coupling member in a depression and projection fitting structure, and a link member to which the spindle is fixed and power is transmitted from the crankshaft to rotate clockwise and counterclockwise in an oscillating manner so that the link member will be driven by the motor to rotate the spindle clockwise and counterclockwise in the oscillating manner, wherein an elastic body is interposed between the coupling member and the crankshaft in the same axial direction as the output shaft. | 08-29-2013 |
20130213684 | POWER TOOL - An electric oscillating tool ( | 08-22-2013 |
20130213681 | DUST COLLECTING DEVICE AND IMPACT TOOL - Disclosed is a feature that collects dust particles that arise from a processing operation of an impact tool. The dust collection device collects dust that arises from of a processing operation and is attached to the impact tool that performs a pre-determined processing operation on a processed member by way of a tool bit mounted to the tip region of the tool body being linearly operated at least in the lengthwise direction. The dust collection device has a dust collection unit of which the tip opens as a dust intake port and the contour shape is formed unevenly around the long axis of the tool bit. The position of the dust collection unit is freely selected around the long axis of the tool bit, and it is possible to cause the position to change around the long axis of the bit. | 08-22-2013 |
20130213679 | HANDHELD ELECTRICAL POWER TOOLS - A handheld electrical power tool may include a plurality of grasping portions, and at least one manipulating member to actuate and deactuate a drive source of the electrical power tool. The at least one manipulating member is positioned to correspond to all of the grasping portions. | 08-22-2013 |
20130207590 | ELECTRIC POWER TOOL - An electric power tool according to the present invention is provided with a tool main body, an induction motor, a power supply unit, and an inverter. The power supply unit and the inverter are integrally incorporated in the tool main body together with the induction motor. | 08-15-2013 |
20130206440 | DUST COLLECTING DEVICE AND IMPACT TOOL - A dust collection device, that collects dust particles generated by an impact tool, has a feature that enables the attachment of the device to the impact tool, which is not provided with an attachment section for the device. The dust collection device has a tool body and an auxiliary handle, attached removably to the tool body, and is attached to an electric hammer that, in the lengthwise direction, linearly operates a tool bit mounted to the tip region of the tool body, and collects dust generated by the electric hammer. The dust collection device has: a dust collection unit that has a dust intake port at the tip; a dust collection hose, connected to the dust collection unit, for transferring dust to the downstream side; and a hose-holding unit that holds the dust collection hose. The hose-holding unit can be attached to and removed from the auxiliary handle. | 08-15-2013 |
20130191428 | RANDOM NUMBER GENERATING DEVICE - A random number generating device includes: a microcomputer; a first oscillator circuit that has a predetermined temperature characteristic and generates a clock serving as a basis of a behavior of the microcomputer; and an electronic circuit that has a temperature characteristic being different from the predetermined temperature characteristic of the first oscillator circuit and operates in accordance with a command from the microcomputer. The microcomputer measures an operating time of the electronic circuit based upon the clock generated by the first oscillator circuit and generates a random number based upon a result of the measurement. | 07-25-2013 |
20130187461 | ELECTRIC APPARATUS - A rechargeable battery type electric power tool is widely used for a construction work or a horticultural work. A battery of the electric power tool can also be used as a power source of an electric apparatus. Because of this construction, there is provided the electric apparatus that has a function equivalent to that of an AC power source type apparatus. | 07-25-2013 |
20130177796 | ELECTRIC TOOLS - A battery housing portion S includes regulating members | 07-11-2013 |
20130175961 | ELECTRIC POWER TOOL - An electric power tool is configured to control power supply to a motor based on an operational amount of the variable speed switch, and further configured to perform in an intermittent control mode in which power supply to the motor is varied intermittently in the same manner as if an ON operation and an OFF operation of the variable speed switch were repeated. It is also able to perform in a continuous control mode in which power supply to the motor is varied based on the operational amount of the variable speed switch. | 07-11-2013 |
20130165027 | SANDER - A sander includes an upper portion configured as a holding portion, and side peripheral portions. At least one constriction is formed in the side peripheral portions in such a manner as to be sunk into the side peripheral portions. The constriction is configured to be dent with respect to the holding portion. | 06-27-2013 |
20130165026 | SANDER - A sander is of a palm type, and its upper portion is configured as a holding portion. A battery attachment portion to which a battery having an elongated shape is attachable is oriented at an angle not less than 0 degrees with respect to a vertical direction, such that if a longitudinal direction of the battery is angled, a lower portion of the battery is in a position shifted inward farther than an upper portion of the battery. | 06-27-2013 |
20130164589 | ELECTRIC TOOL POWERED BY A PLURALITY OF BATTERY PACKS AND ADAPTER THEREFOR - An electric power tool comprises a main body supporting a tool and an electric motor housed in the main body for driving the tool. A plurality of first battery interfaces is configured to removably receive or attach a plurality of first battery packs and to electrically connect the plurality of attached first battery packs in series with the electric motor. A plurality of indicators is configured to communicate information concerning the respective conditions of the plurality of attached first battery packs. The plurality of indicators is arranged such that all of the indicators are simultaneously viewable by a user of the electric power tool. | 06-27-2013 |
20130161049 | DUST COLLECTING DEVICE AND IMPACT TOOL - A feature that contributes to an improvement in the attachment to an impact tool of a dust collection device that is attached to the impact tool and that collects dust particles that said impact tool generates. The dust collection device collects dust that the impact tool generates and is attached to said impact tool that, in the lengthwise direction, linearly operates a tool bit that is mounted to the tip region of a tool body. The dust collection device has: a dust collection unit that has a dust intake port at the tip; and a dust transfer unit that is connected with the dust collection unit in order to transfer dust sucked in from the dust intake port towards the downstream side. The dust collection unit is held by the shaft section of the tool bit, and the dust transfer unit is held by the tool body. | 06-27-2013 |
20130161048 | POWER TOOL - An electric driver ( | 06-27-2013 |
20130157550 | GRINDER - A grinder includes a body having an annular portion, a wheel cover which is attachable to the annular portion, and a wheel cover holding member which holds the wheel cover. The wheel cover has a cylindrical portion which is attachable to the annular portion. The wheel cover holding member has a slide member and a pressing portion which moves the slide member. The pressing portion switches a state between an engagement state in which the slide member is engaged with the cylindrical portion and a disengagement state in which the slide member is disengaged with the cylindrical portion by moving the slide member. The pressing member moves on a second line which is parallelly offset from a first line passing the center of the annular portion in a predetermined direction. | 06-20-2013 |
20130154565 | FOREIGN MATERIAL REMOVING STRUCTURE FOR CHARGER - A foreign material removing structure includes an inserting hole, a battery-side terminal, and a push-out section. The hole provided in a battery pack extends in an attaching direction of the pack, and has an opening that a charger-side terminal can enter, the opening being formed in one end side in an extending direction. The battery-side terminal is provided in the hole to contact the charger-side terminal that enters the hole from the opening when the pack is attached to the charger. The section provided on the further forward side in the attaching direction than the opening in the pack has a surface that intersects the attaching direction. The structure is configured such that the section is at a region shifted to the further forward side in the attaching direction than the charger-side terminal when the forward side in the attaching direction of the battery-side terminal contacts the charger-side terminal. | 06-20-2013 |
20130149943 | DEVICE FOR PREVENTING REMOVAL OF A FIXING MEMBER OF A WHETSTONE COVER IN A DISC GRINDER - In a configuration in which a fixing screw is tightened and fixed between opposite ends of an attaching section of a whetstone cover, the fixing screw can be prevented from being removed from the end of the attaching section by fitting a rubber ring to a threaded shank of the fixing screw between opposite ends of the attaching section . | 06-13-2013 |
20130147436 | BATTERY PACK AND ELECTRONIC PAYMENT SYSTEM - A battery pack of the present invention is a battery pack for an electric power tool, which is to be detachably attached to the electric power tool to supply electric power to the electric power tool. The battery pack includes a battery unit that can be charged and discharged, and a fee calculation information detection unit that detects information for calculating a usage fee in accordance with use of the electric power tool. | 06-13-2013 |
20130139348 | HANDY CLEANERS - One aspect according to the present invention includes a handy cleaner including a cleaner body and a battery pack. The battery pack serves as a power source and includes a lithium-ion battery. The battery pack can be mounted to and removed from a cleaner body without need of operating a cover or the like mounted to the cleaner body. | 06-06-2013 |
20130119792 | ELECTRICAL POWER TOOLS - An electrical power tool may include a switching device capable of controlling output power of a motor, a circuit board supporting the switching device, and a metal case receiving the circuit board. The switching device includes a conductive part and an insulated portion that is covered by an insulating covering material. The conductive part of the switching device contacts the circuit board. The insulated portion of the switching device contacts the metal case via the insulating covering material. | 05-16-2013 |
20130104704 | HANDHELD WORK MACHINE | 05-02-2013 |
20130099722 | POWER SUPPLY DEVICE FOR ELECTRIC POWER TOOL - The present invention is a power supply device for electric power tool that supplies an electric power to an electric power tool. The power supply device includes: an adapter configured to be electrically connected to the electric power tool; and a fuel cell configured to generate an electric power to be supplied to the electric power tool through the adapter, by causing an oxidation reaction between a fuel and an oxidant. | 04-25-2013 |
20130097878 | HAND-HELD CUTTING TOOLS - A hand-held cutting tool may include a handle and a battery pack. The handle has a rear portion with respect to a work proceeding direction along which the cutting tool is moved for performing a cutting operation. When the battery pack is mounted to the rear portion of the handle, the longitudinal direction of the battery pack extends non-parallel with the work proceeding direction. | 04-25-2013 |
20130082631 | ELECTRIC POWER TOOL, LOCK STATE OCCURRENCE DETERMINATION APPARATUS, AND PROGRAM - A lock state occurrence determination apparatus includes a counter, a reset device, a reference time changing device, a lock state determination device, and an invalidation device. The invalidation device performs, in a case where a false determination of occurrence of a lock state of a motor is caused by the lock state determination device due to an operation input to operate a rotation speed of the motor, at least one of a first invalidation operation to invalidate the lock state determination device and a second invalidation operation to invalidate continuation of a counting operation by the counter. | 04-04-2013 |
20130076271 | ELECTRIC POWER TOOL - An electric power tool of the present invention includes: a lighting unit; a motor that drives a tool element; a setting switch that is turned ON/OFF to change an operation mode setting and a lighting mode setting; a setting switching unit that changes the operation mode setting and the lighting mode setting corresponding to a manner of operation provided to the setting switch; a motor control unit that controls the motor according to a control method for one of the operation modes currently set by the setting switching unit; and a lighting control unit that controls the lighting unit corresponding to one of the lighting modes currently set by the setting switching unit. When the setting switch is turned on, the setting switching unit changes one of the operation mode setting and the lighting mode setting corresponding to a duration time of an ON state of the setting switch. | 03-28-2013 |
20130075122 | WORK MACHINE HAVING MAIN POLE - A work machine includes a main pole internally including a rotation shaft, a tool unit located at one end of the main pole, and a power unit located at another end of the main pole. The main pole includes a first partial pole, a second partial pole and a joint member that joints them to each other. The first partial pole includes a positioning member. The joint member includes a positioning hole configured to engage with the positioning member and a guide groove extending from the positioning hole. The guide groove is configured to guide the positioning member to the positioning hole and to allow the positioning member to escape in at least a section thereof. | 03-28-2013 |
20130074347 | RECHARGEABLE PLATE JOINER - An attachment portion of a battery pack serving as a power supply is formed on a rear end of a motor housing of a rechargeable plate joiner, and the battery pack is slid and attached to the attachment portion of the horizontally disposed motor housing from above. In this state, a center of gravity position of the battery pack is positioned on an axis line of an output shaft of a motor. | 03-28-2013 |
20130068179 | ENGINE FOR PORTABLE WORKING MACHINE - An engine for a portable working machine includes: a crankshaft to which the working machine is coupled; an air-cooling fan coupled to one end side of the crankshaft; a fan casing enclosing the air-cooling fan; and a bottom cover located in a bottom surface side of the engine and connected to the fan casing. Air suction ports and guide parts are provided in one side of the bottom cover, the air suction ports sucking in air supplied from the air-cooling fan, and the guide parts extending from the air suction ports to the impeller blades of the air-cooling fan. | 03-21-2013 |
20130062955 | ELECTRIC POWER TOOL POWERED BY BATTERY PACK AND ADAPTER THEREFOR - An adapter is provided with a connecter portion configured to be detachably attached to the main body of the electric power tool and at least one battery receiving portion configured to be detachably attached to the battery pack. The battery pack attached to the battery receiving portion is electrically coupled with the main body of the power tool attached to the connecter portion via a power supply circuit of the adapter. The adapter is provided with a measuring portion configured to measure an index corresponding to a charged level of the battery pack and a signal receiving portion configured to receive an alarm signal outputted from the battery pack, and is configured to stop or restrict power supply to the main body of the electric power tool based upon a measurement by the measuring portion and the alarm signal that is received. | 03-14-2013 |
20130062498 | POWER TOOL AND SUSPENSION DEVICE FOR THE POWER TOOL - The suspension device includes a ring for hanging the power tool and a ring retaining member provided at an upper part of a housing of the power tool. The housing has a grip at a lower part thereof. The ring retaining member is configured such that the ring is movable between a standing position and a lying position and that the ring is retainable in the standing position. | 03-14-2013 |
20130055527 | POWER TOOL DUST COLLECTING DEVICE AND POWER TOOL - A power tool dust collecting device includes, in a housing in which a suction opening is protrudingly provided and on which a power tool is mountable, a motor chamber holding a motor having a brush that comes into sliding contact with a commutator of a rotor rotating integrally with an output shaft, a fan chamber housing a dust collecting fan attached to the output shaft of the motor, and a dust collecting chamber in which a filter, through which passes air sucked up from the suction opening due to rotation of the dust collecting fan in accordance with driving of the motor and which collects dust in the air, is mounted on an upstream side of the fan chamber. A cushioning member is interposed between an inner wall of the motor chamber and an outer peripheral surface of the motor. | 03-07-2013 |
20130055523 | POWER TOOL DUST COLLECTING DEVICE AND POWER TOOL - In a power tool dust collecting device, a blocking ring that is subject to elastic deformation upon contact with a workpiece surface for blockage between a suction head and the workpiece surface is provided to the front surface of the suction head to be brought into contact with the workpiece surface. The blocking ring has a ventilating portion (a V-shaped slit) that ensures the flow of air to the suction head regardless of whether the elastic deformation has occurred. | 03-07-2013 |
20130048327 | IMPACT TOOL - An impact tool is provided with a rational structure of connecting a ring-like member and a counter weight. The impact tool has a tool body, a motor, a drive shaft, a ring-like member that is caused to swing in an axial direction of a tool bit by rotation of the drive shaft, a tool driving mechanism, that is connected to the ring-like member and caused to rectilinearly move in the axial direction of the tool bit, and a counter weight that reduces vibration caused in the tool body in the axial direction of the tool bit. The counter weight has a connecting part that comes in contact with an outer edge of the ring-like member in at least one of axial directions of the tool bit, and the counter weight is connected to the ring-like member via the connecting part. | 02-28-2013 |
20130033790 | HEAT GENERATION AMOUNT ESTIMATION UNIT FOR BATTERY FOR ELECTRIC POWER TOOL, AND APPARATUS FOR ELECTRIC POWER TOOL - A disclosed heat generation amount estimation unit is used for a battery for an electric power tool, and estimates a heat generation amount of the battery that is a power source of the electric power tool. The heat generation amount estimation unit includes a computation device, and is provided in an apparatus for electric power tool. The computation device periodically reads, either during a discharge from the battery or during a charge to the battery, a detected current from a current detection device, which detects a current corresponding to this point in time from among a discharge current and a charge current flowing through the battery, and adds/subtracts a heat generation amount equivalent value in accordance with a value of the read detected current. The computation device outputs the added/subtracted heat generation amount equivalent value as an estimated value representing the heat generation amount of the battery. | 02-07-2013 |
20130033233 | BATTERY PACK FOR ELECTRIC POWER TOOL, CONTROL CIRCUIT, AND PROGRAM - A battery pack for electric power tool is provided with a battery and a control circuit. The circuit includes a condition satisfaction determination unit, a continua lion satisfaction determination unit, and a sleep-mode transition unit. The condition satisfaction determination unit determines whether each of at least one predetermined sleep-mode transition condition is satisfied, and determines whether an all-condition satisfaction state is present, which is a state wherein all of the at least one sleep-mode transition condition are satisfied. The continuation satisfaction determination unit determines whether the all-condition satisfaction state has continued for a predetermined. period of time when the condition satisfaction determination unit determines that the all-condition satisfaction state is present, The transition unit stops part of operation of the circuit to shift the circuit to a sleep mode when the continuation satisfaction determination. unit determines that the all-condition satisfaction state has continued for the predetermined period of time. | 02-07-2013 |
20130033217 | ELECTRIC POWER TOOL - In an impact driver, a link unit (a link sleeve and first and second elongated protrusions) is provided between the mode switching ring for selecting an operation mode and the slide button for selecting the rotation speed. With the link unit, a switching operation of a slide button to the high-speed side is performed in coordination with a selecting operation of a mode switching ring to an impact mode or a vibration drill mode and the rotation speed is held at high speed. | 02-07-2013 |
20130033134 | ELECTRIC TOOLS - An electric tool may include a motor housing and a motor disposed within the motor housing. The motor has a stator fixed in position relative to the motor housing and a rotor rotatable about a motor axis. Cooling air can flow within the motor housing across the motor in a direction substantially parallel to the motor axis. A baffle may be disposed within the motor housing for regulating the flow of cooling air across the motor. At least a part of the baffle may be positioned within a range of a length of the stator with respect to the axial direction of the motor axis. | 02-07-2013 |
20130032370 | ELECTRIC POWER TOOL WITH VIBRATION MECHANISM - An impact driver with a vibration mechanism includes a vibration switching ring externally fitted to a second cam in the forward position in such a manner that an inner protrusion on the inner circumference is latched a protrusion on the outer circumference of the second cam so that the rotation of the second cam is restricted. Further, a coil spring is provided for biasing the vibration switching ring to the forward position. A link plate provided between the mode switching ring and the vibration switching ring latches onto the front surface of the vibration switching ring and engages an engaging protrusion at the rear end with a mode switching ring. The link plate moves forward or backward to a first position where the vibration switching ring moves to the forward position or a second position where the vibration switching ring moves to the backward position. | 02-07-2013 |
20130031881 | POWER TOOL DUST COLLECTING DEVICE AND POWER TOOL - A power tool dust collecting device includes a fan chamber and a dust collecting chamber. The fan chamber is formed in a housing which is mountable on a hammer drill and in which a suction opening is provided protrudingly. The fan chamber houses a fan that rotates in accordance with driving of a motor. The dust collecting chamber is formed on an upstream side of the fan chamber. Mounted on the dust collecting chamber is a filter through which passes air that has been sucked up from the suction opening by the rotation of the fan and which collects dust included in the air. An air pumping unit that pumps air from a downstream side of the filter toward an upstream side is provided inside the housing. | 02-07-2013 |
20130031879 | DUST COLLECTING DEVICE - A dust collecting device is provided which is capable of preventing static charge while rationally collecting dust generated during operation. | 02-07-2013 |
20130031788 | BRUSH CUTTER - a brush cutter comprises an operating rod and a cord holder configured to be rotatably driven at a front end of the operating rod. A cutting cord is held by the cord holder and configured that a tip of the cutting cord is drawn out from the cord holder. The brush cutter further comprises an upper cover, a trimming cutter and a bouncing wall. The upper cover is configured to cover from an upper side and lateral side a part of region in which the cutting cord extending from the cord holder revolves. The trimming cutter is configured to cut the tip of the cutting cord drawn out from the cord holder. The bouncing wall is located inside the upper cover and configured to bounce off a cut piece of the cutting cord cut by the trimming cutter toward an opposite side from a user. | 02-07-2013 |
20130031787 | BRUSH CUTTER - A brush cutter is provided with an operating rod, a cord holder configured to be rotatably driven at a front end of the operating rod, a cutting cord held by the cord holder and configured that a tip of the cutting cord is drawn out from the cord holder, and an under cover configured to cover from an under side a part of a region in which the cutting cord extending from the cord holder revolves. The cord holder is provided with a cord feeding button that projects downward and is configured to feed the cutting cord by being pressed. The under cover is provided with an opening that exposes the cord feeding button. | 02-07-2013 |
20130027828 | INTERNAL TEMPERATURE ESTIMATION UNIT FOR BATTERY FOR ELECTRIC POWER TOOL, AND APPARATUS FOR ELECTRIC POWER TOOL - An internal temperature estimation unit, which reads a detected temperature of a cell of a battery for an electric power tool to estimate an internal temperature of the battery based on the detected temperature, includes: an initial-value setting device which reads, when a discharge/charge of the battery is started, the detected temperature and sets the detected temperature as an initial value; and a temperature increase amount calculation device which calculates a temperature increase amount of the cell of the battery based on a latest value of the detected temperature and the initial value set by the initial-value setting device; the internal temperature estimation unit outputs the temperature increase amount as an estimated value representing the internal temperature of the battery. | 01-31-2013 |
20130025893 | ELECTRIC POWER TOOL POWERED BY BATTERY PACK AND ADAPTER THEREFOR - An adapter for an electric power tool couples battery packs with the electric power tool. The adapter is provided with a voltage regulator circuit interposed between the battery packs and the electric power tool. The voltage regulator circuit regulates a supply voltage from the battery packs to the electric power tool to a level corresponding to a rated voltage of the electric power tool. The voltage regulator is capable of raising the supply voltage higher than nominal voltages of the battery packs. | 01-31-2013 |
20130023189 | ELECTRIC POWER TOOL - In a grinder, a motor is accommodated in a housing so that an output shaft faces forward, a paddle switch that turns on and off a drive switch of the motor is supported by the housing so that the paddle switch can be operated to move in a direction perpendicular to the output shaft of the motor, and a brake device that brakes rotation of the output shaft is provided on a front side of the motor in the housing. The grinder includes a cooperative mechanism that releases the brake device in response to a pushing operation of pushing the paddle switch toward the housing to turn on the drive switch. | 01-24-2013 |
20130014966 | ELECTRIC-POWER CULTIVATORAANM TOZAWA; KatsumiAACI Anjo-shiAACO JPAAGP TOZAWA; Katsumi Anjo-shi JPAANM TAKEDA; ShigeruAACI Anjo-shiAACO JPAAGP TAKEDA; Shigeru Anjo-shi JPAANM HANEDA; KoujiAACI Anjo-shiAACO JPAAGP HANEDA; Kouji Anjo-shi JPAANM WATANABE; MitsunoriAACI Anjo-shiAACO JPAAGP WATANABE; Mitsunori Anjo-shi JP - A cultivator may include at least one rechargeable battery for an electrical power tool as a power source. The at least one rechargeable battery may include a plurality of rechargeable batteries. Further, the plurality of rechargeable batteries may be switched in sequence, so as to be used as the power source. | 01-17-2013 |
20130008680 | IMPACT TOOL - An impact tool includes a motor, a hammer casing with an opened rear end and a disk-shaped member coupled to the hammer casing to close the opened rear end and to rotatably support a spindle. A first engagement member is formed on an outer face of the disk-shaped member. A second engagement member is formed on an inner face of the recess and engaging with the first engagement member to restrict a movement of the hammer casing in a second direction parallel to a rotation axis of the spindle. A third engagement member is formed on an outer face of the hammer casing. A fourth engagement member is formed on an inner face of the housing body and engaging with the third engagement member so as to restrict a movement of the hammer casing in the first direction. | 01-10-2013 |
20130006405 | PORTABLE RADIO SETS - Embodiments of the present invention may include a box-shaped housing having an upper face; a sound output device for reproducing sound; and an attachment device provided on the upper face of the housing and configured so that a portable audio player can be directly attached thereto. The attachment device allows the sound output device to communicate with the audio player attached thereto, whereby the sound output device can reproduce the sound data stored in the audio player as sound. | 01-03-2013 |
20130000938 | POWER TOOL - A hand-held power tool comprises a motor, an output section which is rotationally driven by the motor, and an output change section which changes the output of the output section in a stepless manner while normally driving the motor. The hand-held power tool is improved so that the output of the output section during working can be smoothly controlled. | 01-03-2013 |
20130000937 | IMPACT TOOL - An impact tool in which a tool body can be effectively reduced in size is provided. The impact tool has a motor | 01-03-2013 |
20130000936 | IMPACT TOOL - An impact comprising: a motor ( | 01-03-2013 |
20130000587 | STARTER FOR A POWER TOOL WITH IMPROVED KINEMATICS - Starter for starting a combustion motor for a power tool includes a rotating tension means roller, onto which a tension means can be wound and which via active connection is connected to a entrainment means of the combustion motor in order to introduce a rotating movement into the combustion motor. The active connection has at least one double crank gear between the tension means roller and the entrainment means. | 01-03-2013 |
20120326669 | POWER TOOL STORAGE CASE - A power tool storage case includes a main case that has a tool storage portion, a battery storage portion and a charger storage portion, and a lid that can open and close the main case. The charger storage portion is a dual-purpose storage portion that can hold one of a charger and a battery pack in accordance with selection of one of the charger and the battery pack. | 12-27-2012 |
20120322605 | ELECTRIC POWER TOOL - An electric power tool includes a housing, a motor disposed in the housing, a planetary gear reduction mechanism and an internal gear. The planetary gear reduction mechanism includes multi-stage planetary gears, multi-stage carriers each configured to carry a plurality of planetary gears, and a bearing assembled with a final-stage carrier from a rear side of the final-stage carrier to rotatably support the final-stage carrier. The internal gear is configured to be rotatable and axially slidable while allowing planetary motion of final-stage planetary gears supported by the final-stage carrier. A gear portion provided on the final-stage carrier is formed as a separate gear which is assembled with the final-stage carrier from the rear side of the final-stage carrier after assembling the bearing with the final-stage carrier. | 12-20-2012 |
20120321912 | BATTERY DEVICES - A battery carrier configured to be mounted to a tool body of an electric tool for supplying electric power to the tool body may include a plurality of battery mount sections arranged in a juxtaposed relationship, each battery mount section may be configured to hold a battery that has a length along a longitudinal direction, the length of each mounted battery may be substantially the same, and the battery mount sections may be arranged and configured so that when batteries are mounted on the battery mount sections, longitudinal axes of the respective batteries mounted to the battery mount sections may extend at least partially parallel to each other. | 12-20-2012 |
20120318549 | IMPACT TOOL - In an impact tool, a hammer case into which an output shaft of a motor is inserted is assembled to the front of a housing containing a stator core. In the hammer case, a spindle to which rotation is transmitted from the output shaft of the motor is provided. The rear end of the hammer case is coupled with a bearing box. In the housing, a partition wall through which the output shaft passes is provided between the stator core side and the hammer case side. On the housing, an air inlet is provided. An electric circuit board is provided on the front face of the stator core to close the front face with the output shaft passing therethrough. Between the electric circuit board and the partition wall, a waterproof member through which the output shaft passes is provided to close the gap therebetween. | 12-20-2012 |
20120318548 | IMPACT TOOL - In an impact tool, a hammer is divided into an inner-side main hammer engageable with or disengageable from an anvil and an outer-side sub hammer having a peripheral wall covering an outer periphery of the main hammer and formed as a separate member. The sub hammer is rotatably disposed in a rearward position, and the peripheral wall is engageable with the main hammer so that the main hammer and the sub hammer are unitarily rotatable. A connecting member is disposed between the main hammer and the peripheral wall in such a manner as to be movable between a connecting position and a disconnected position using a switching device. When the connecting member is moved in the connecting position, a drill mode is selected, in which retraction of the main hammer is restricted. | 12-20-2012 |
20120318112 | COVERING DEVICE FOR CUTTING MACHINE AND CUTTING MACHINE HAVING THE SAME - A covering device for a cutting machine includes a fixing cover provided on a base and covering a disc-shaped rotary tool provided at an end of the cutting machine. The fixing cover includes a tiltable body coupled to the fixing cover such that the tiltable body can be tilted in an up-down direction. The amount by which the rotary tool projects downward from the base can be changed by changes of the tilt position of the tiltable body with respect to the fixing cover. The fixing cover further includes a variable member having a plurality of abutment portions that are brought into abutment with the tiltable body along with a downward tilt of the tiltable body, and allows the tilt position to be selected from different tilt positions in accordance with an operation to select from the plurality of abutment portions. | 12-20-2012 |
20120317950 | ELECTRIC LAWN MOWERS - An electric lawn mower may include a mower body including an electric motor, a cutting blade rotatably driven by the electric motor for mowing a lawn, and a battery mount configured to hold a battery where the electric motor is driven by electric power from the battery, and the battery is mountable on the battery mount at a mount position where the battery is positioned higher than the electric motor and rearward of an axis of the electric motor. | 12-20-2012 |
20120317949 | ELECTRIC LAWN MOWERS - An electric lawn mower may include a switch assembly including a first switch, a second switch and a main switch. When the main switch is turned on an electric motor is started. The first and second switch may include first and second actuators, respectively. When the switch assembly is operated according to a proper operation sequence, the first actuator and the second actuator may interact with each other to activate the main switch, and when the switch is operated according to an improper operation sequence, the first actuator and the second actuator may not interact with each other, so that the main switch is not activated. | 12-20-2012 |
20120317948 | ELECTRIC LAWN MOWERS - An electric lawn mower may include a mower body including an electric motor, a cutting blade rotatably driven by the electric motor for mowing a lawn, a battery mount configured to hold a battery, and a lock including a key and a key receiver for locking and unlocking the electric motor. The key receiver may be spaced from the battery mount and when the key is inserted into the key receiver, the electric motor may be unlocked for operation. | 12-20-2012 |
20120317821 | POWER TOOL - A power tool is provided with a first unit, a second unit rotatable with respect to the first unit, a lock operation member and a lock cooperative switch. The lock operation member is configured to be operated by the user between a lock position and an unlock position, and configured to prevent rotation of the first and second units at the lock position and allow the rotation between the first and second units at the unlock position. The lock cooperative switch is disposed on the supply circuit of energy to the prime mover, and configured to enable the supply circuit when the lock operation member is at the lock position and cutoff the supply circuit when the lock operation member is at the unlock position. | 12-20-2012 |
20120315103 | IMPACTING TOOL - The impacting tool has a tool holder and a locking part. The locking part can be driven to move between the bit holding position, where it is engaged with the tool bit inserted into the bit inserting hole so that pullout is restrained, and a bit holding released position where the engagement is released and pullout is allowed. The locking part and the tool holder can be integrated with each other while moving in the longitudinal direction of the tool bit, so that they can be driven to move between the bit anchored position where the locking part is set at the bit holding position and the engagement state with respect to the tool bit is maintained, and the bit last connection/disconnection allowed position where the locking part is set at the bit holding released position and releasing of the engagement with respect to the hammer bit is allowed. | 12-13-2012 |
20120313464 | ELECTRIC TOOLS - Embodiments of the present invention may include an electric tool comprising an outer rotor type electric motor as a driving source and a stator supporting member made from metal. The motor preferably includes a stator and a rotator. The stator is preferably supported by the stator supporting member. The rotator is preferably located at an outer periphery of the stator. | 12-13-2012 |
20120312574 | SYSTEM FOR CONVEYING A FLUIDIC MEDIUM IN A POWER TOOL - A system for conveying at least one fluid medium in a power tool includes at least one structural element for forming a frame and/or a part of a housing of the power tool. The fluid medium is conveyed by at least one fluidic connection in the power tool. In the structural element there is at least one channel for forming the fluidic connection and through which the fluid medium can be conveyed. | 12-13-2012 |
20120312573 | ELECTRICAL POWER TOOL - An electrical power tool may include a tool housing that is formed by connecting an outer circumferential surface of a motor housing containing a motor therein and a proximal end portion of a handle. The handle has a grip portion provided to a portion close to a distal end portion thereof and having a trigger switch to activate the motor, Power-supply cords of the motor arc introduced into the tool housing through a power-supply cord insertion portion that is positioned in a portion of a proximal end portion of the handle. A distribution path of the power-supply cords is positioned in a portion other than the grip portion of the handle. | 12-13-2012 |
20120312138 | SUPPLY DEVICE FOR SPRAYING A CUTTING TOOL OF A HANDHELD POWER TOOL AND A POWER TOOL OF THIS TYPE - A supply device for a handheld power tool for a cutting grinder includes a cutting tool and a protective cover which at least partially surrounds the cutting tool. The supply device includes a U-shaped element which can be arranged on the protective cover and via which a fluid medium can be supplied to the cutting tool. The U-shaped element has a connection piece on which a coupling element can be arranged. On the coupling element a pipeline can be connected via which the fluid medium can be supplied to the U-shaped element through the connection piece. The coupling element can be turned about the axis of rotation of the connection pieces. | 12-13-2012 |
20120312121 | PROTECTIVE COVER FOR A HANDHELD POWER TOOL - A protective cover for a handheld power tool, with a tool that is at least partially surrounded by the protective cover, is formed of at least a first wall element and a second wall element, which in order to form a tool space are connected to each other in a parallel-spaced arrangement. The first wall element has a first circumferential section and the second wall element has a second circumferential section. The circumferential sections overlap each other and form a circumferential wall of the protective cover, with at least one opening which is provided in the outer-lying second circumferential section and under which the inner-lying first circumferential section extends. | 12-13-2012 |
20120305277 | POWER TOOL - A power tool, which actuates a tool linearly in a longitudinal direction of the tool, the power tool performs a predetermined operation to a workpiece, having: a drive mechanism which actuates the tool; a rotational shaft which actuates the drive mechanism; a swing lever which swings along the longitudinal direction by a rotational motion of the rotational shaft; and a dynamic vibration reducer which alleviates vibration generated during the predetermined operation. The dynamic vibration reducer includes a weight which is linearly movable in the longitudinal direction an elastic member which biases the weight. The weight is adapted to be actuated mechanically and forcibly by a motion component with respect to the longitudinal direction of a swinging motion of the swing lever in a state that the weight is biased by the elastic member. | 12-06-2012 |
20120299402 | ELECTRIC POWER TOOL - There is disclosed an electric power tool in which magnetic saturation seldom occurs in a tooth of a stator without increasing the size of a motor. The electric power tool includes a motor having a stator with a plurality of teeth formed circumferentially at equal intervals and axially extending groove-like slots between each tooth, with winding wires being wound around each tooth by use of the slots, and having a tubular rotor coaxially surrounding the stator with a permanent magnet of a plurality of poles on an inner peripheral surface facing distal end surfaces of the teeth of the stator. Further, the ratio of the number of poles of the permanent magnet of the rotor to the number of slots of the stator is set to be 4 to 3. | 11-29-2012 |
20120298391 | DRIVING SOURCE SUPPLY SYSTEM OF ATTACHMENT DEVICE-EQUIPPED ELECTRIC POWER TOOL - A male terminal is formed on a dust collecting device so as to protrude therefrom, while a plug-in port into which the male terminal can be inserted, and a female terminal that is located inside the plug-in port and can be electrically connected to the male terminal, are provided in a hammer drill. When the dust collecting device is joined to the hammer drill and the male terminal is electrically connected to the female terminal, a driving source is supplied from a battery pack to the dust collecting device. | 11-29-2012 |
20120297632 | CUTTING TOOLS - A cutting tool may include an outer housing that receives a motion conversion unit and a drive device therein. A cutting blade may be driven by the drive device via the motion conversion unit. A dust preventing device may prevent dust from reaching to the drive motor from between the outer housing and the motion conversion unit. | 11-29-2012 |
20120295524 | GRINDER - A grinder includes a lock mechanism, attached to a bearing box, that inhibits detachment/rotation of a cylindrical portion of a wheel cover. The lock mechanism includes a ring-shaped lock member, with a larger diameter than the cylindrical portion, that surrounds the bearing box and has a front side inner edge protruding engagement hook. The lock member can slide between a front-side lock released position at which the engagement hook is separated from the bearing box to the front side and the cylindrical portion can be attached/detached to/from the bearing box, and a rear-side locked position at which the engagement hook passes through the cylindrical portion that surrounds the bearing box and engages with a bearing box outer periphery such that a front portion is contained within a gear housing in a plan view. The lock mechanism also includes a torsion spring that urges the lock member to the locked position. | 11-22-2012 |
20120292865 | FALLING PREVENTION STRUCTURE FOR SOCKET OF POWER TOOL - An object of the present invention is to prevent a socket from falling off by means of a simple and compact configuration without impairing comfort and ease of use, regardless of model. In an impact driver, a connecting ring in which a protrusion including a through hole protrudes from an outer periphery thereof is clamped detachably to an outer periphery of a shaft support portion of a hammer case. By a carabiner passing through a ring of a socket and the through hole in the connecting ring and engaging the carabiner, a socket portion can be prevented from falling off when a bit portion is broken. | 11-22-2012 |
20120292069 | PORTABLE POWER TOOL - A power tool is provided with a prime mover which causes the tool to rotate and a housing which houses the prime mover. In a back-end face that is positioned on an opposite side on the housing from a tool side, a back-end groove, into which a user can position his/her web between his/her thumb and forefinger, is formed. A pair of side-face grooves, into which the user can place the thumb and forefinger, are formed in both side faces of the housing. A depth changing portion is formed in at least one of the side-face grooves, such that the depth is reduced toward the back-end face of the housing. According to this structure, even when the housing is gripped directly from the back-end face, the user can easily draw up or raise the power tool. | 11-22-2012 |
20120289377 | ELECTRIC TOOL - An electric tool causes a drive mechanism to drive a tip tool to thereby cause the tip tool to perform predetermined work, and the drive mechanism is provided with a driving gear and a driven gear which meshes with the driving gear. The electric tool is configured in such a manner that an axial force or a radial force generated by the meshing between the driving gear and the driven gear is measured to detect the state of torque acting on the tip tool, and drive control of the drive mechanism is performed according to the detected state of torque. | 11-15-2012 |
20120279743 | ELECTRIC POWER TOOL - An electric power tool includes an electric motor, a rotation speed detection device, a brake device, and a rotation speed-based activation device. The electric motor generates a driving force to rotate an object to be driven. The rotation speed detection device detects a rotation speed of the electric motor. The brake device executes braking control to brake the electric motor. The rotation speed-based activation device activates the brake device when the rotation speed detected by the rotation speed detection device becomes equal to or less than a specified rotation speed, which is arbitrarily set, after a stop command to shut off electric current supply to the electric motor is issued. | 11-08-2012 |
20120279740 | STRIKING TOOL - A technique for making a handle vibration-proof while avoiding size increase is provided in an impact tool. The impact tool has a striking mechanism part for driving a tool bit in its axial direction, a motor for driving the striking mechanism part, a tool body housing the motor and striking mechanism part, an outer shell housing covering part of the tool body, a handle that is integrally formed with the outer shell housing and extends transversely to the axial direction, a first handle end portion formed on one extending end of the handle, a second handle end portion formed on the other extending end of the handle, a first elastic element that connects the first handle end portion and tool body for relative movement in the axial direction, and a second elastic element that connects the second handle end portion and tool body for relative movement in the axial direction. | 11-08-2012 |