Patent application number | Description | Published |
20100283990 | Optoelectronic distance measuring device - The optoelectronic distance measuring device of the present invention comprises a signal generator for generating a high frequency signal, an emitter for emitting an optical beam signal towards an object to be measured, a photoelectric receiving and transforming device for receiving the reflected measuring optical and for generating a corresponding high frequency reflected measuring signal. The present invention further comprises a phase detector for performing a frequency mixing of signals and a signal processing device connected with the phase detector for determining the measured distance. | 11-11-2010 |
20110050299 | ELECTRICAL INSTRUMENT HAVING A PROTECTION CIRCUIT - A protection circuit suitable for electrical instruments includes a software detecting circuit, a logic AND circuit, a driver and control circuit for engine operating power components, and a hardware detecting circuit connected with the logic AND circuit. Both the software detecting circuit and the hardware detecting circuit monitor the state of an operating switch and provide signals to the logic AND circuit. Only when the state of the switch changes from opened to closed and both detecting circuits determine that this state is correct will the driver and control circuit signal the engine to operate. Furthermore, by connecting two or more power components in serial at the same time, the engine will not work by accident and the machine will not be out of control when any one of the power components is damaged. A circuit using capacitors of suitable specification can also be provided to isolate the controlling pin of a power component in the form of an SCR to thereby avoid failure and damage of the entire system. | 03-03-2011 |
20110061242 | ELECTRIC SHEARS - Electric shears include a housing, a motor within the housing, a transmission means including a reduction gearbox and a bevel gear pair, a fixed blade, a movable blade rotatably connected to the fixed blade and coupled with the motor via the transmission means, and a stroke-control means controlling the movable blade to swing back and forth about its connection with the fixed blade. The fixed blade is supported on the reduction gearbox and fixed to the housing together with the reduction gearbox. Electric shears are thus provided with a small shape, a simple and compact interior structure, and better portability. | 03-17-2011 |
20110196516 | SAFETY SYSTEM FOR A GARAGE DOOR - A safety system for a garage door movable along a door frame is used to detect an obstacle. The safety system includes a motor device for opening and closing the garage door, a control circuit for controlling the motor to open and close the door, a light emitting device for emitting a light, a light receiving device in communication with the control circuit for receiving the light, wherein the light emitting device and the light receiving device are to be mounted on one side of the door frame, and an optical reflecting device for mounting on the other side of the door frame opposite to the light emitting device and the light receiving device whereby the light receiving device will receive light emitted from the light emitting device and reflected by the optical reflecting device. An optical element is to be mounted near the optical reflecting device for changing the polarization direction of the reflected light, and another optical element is to be mounted near the light receiving device to allow the light in only one polarization direction to pass there through. | 08-11-2011 |
20130163302 | DC-DC CONVERTER SYSTEMS - DC-DC converter systems are disclosed. DC-DC converter systems may include an input, an output, a resonant switched-capacitor DC-DC converter, and a second DC-DC converter. The resonant switched-capacitor DC-DC converter may include a first input side and a first output side. The second DC-DC converter may include a second input side and a second output side. The first input side may be connected to the input, the second input side may be connected to an input voltage, and the first and second output sides may be connected in series to the output. In some examples, the second DC-DC converter may be a buck-boost DC-DC converter. | 06-27-2013 |
20130228353 | TORSION-ADJUSTABLE IMPACT WRENCH - A torsion-adjustable impact wrench, includes a housing, a powering unit including an impact mechanism configured to generate an intermittently increasing torque, an adjusting unit configured to manually set a first torsion value and generate a corresponding a first torsion signal, a detecting unit configured to detect a rotational speed of the powering unit and generate a corresponding first rotational speed signal, and a control unit configured to generate a control signal for controlling the output of the rotational speed of the powering unit. The control unit generates a second rotational speed signal according to the first torsion signal outputted by the adjusting unit, compares the first rotational speed signal with the second rotational speed signal, and generates a control signal enabling the rotational speed of the powering unit to approach the second rotational speed. | 09-05-2013 |
20130278916 | LASER RANGEFINDER AND CONDENSER LENS THEREOF FOR RECEIVING A LIGHT RAY - A condenser lens suitable for a laser rangefinder includes a lens body wherein the lens body is formed with or has attached thereto a deviation correction area that is located on the light emitting side thereof for correcting focus deviation upon reception of light scattered by a close range object. A center of the body is located inside the deviation correction area of the lens. The deviation correction area may include one or more deviation correction zones. | 10-24-2013 |
20140182420 | ELECTRICAL WRENCH - An electrical wrench includes a housing, a power member, a reversing mechanism, a support transmission assembly, an opening gear, a main control assembly and a restoring assembly. The housing includes having two projections, for example shaped as claws, arranged oppositely to cooperatively define an entrance. The power member, the reversing mechanism, the support transmission assembly and the opening gear are cooperatively coupled to one another and accommodated in the housing. The opening gear includes an outer teeth portion, an opening and a driving portion in communication with the opening, a tubular member for engaging with a fastener positioned in cooperation with the opening gear through the entrance. The restoring assembly includes an identifying portion, a sensor for sensing the position of the identifying portion, a control circuit board, a restoring switch and a restoring switch operator. | 07-03-2014 |
20140296020 | ELECTRIC TOOL - An electric tool has a housing, a motor disposed in the housing, an output shaft, a first planetary gear transmission mechanism, having a power input member, disposed between the motor and the output shaft, and a locking mechanism, having a power output member. The locking mechanism has a locked state and an unlocked state. When torsion is transmitted from the motor to the output shaft, the locking mechanism is in the unlocked state, and the output shaft is driven by the motor to rotate to perform electric operation. When the output shaft reversely receives a force, the locking mechanism is in the locked state, and the power input member of the first planetary gear transmission member is locked to perform manual operation, and the locking mechanism is connected to the output shaft via the first planetary gear transmission mechanism, and the power output member of the locking mechanism is non-rotatably connected to the power input member of the first planetary gear transmission member. The electric tool can also memorize the torsion input by the operator upon manual operation and operate according to the torsion. | 10-02-2014 |
20140332242 | METHOD FOR CONTROLLING TORQUE OUTPUT OF DC ELECTRIC TOOL - A method for controlling a torque output of a DC electric tool, includes presetting torque levels and voltage ranges corresponding to the torque levels, detecting the current output voltage of a battery and determining the voltage range in which the current output voltage is located, determining whether or not the current voltage range matches the preset torque level or not, and if the current voltage range does not match the preset torque level providing a warning that the torque output cannot reach the preset torque level and calculating and displaying a maximum torque level corresponding to the actual torque output value and, if the current voltage range does match the preset torque level, calculating the current actual torque output value and keeping a PWM modulation value constant if the torque output value conforms to the preset torque level or increasing the PWM modulation value for compensation if the torque output value does not conform to the preset torque level. | 11-13-2014 |
20140352992 | ROTATION SPEED CONTROL METHOD FOR IMPACT TYPE FASTENING TOOLS - A rotation speed control method for impact type fastening tools has a presetting step and a dynamic control step. The presetting step includes setting a plurality of working positions, and setting a PWM signal with a larger duty cycle as a driving signal in a period after energization so that a motor can rotate at a higher speed and improve work efficiency. When a main controller judges, according to a feedback means, that the operation enters an impact phase and torsion control is needed to reduce rotation speed, the main controller makes adjustment by driving the motor with a PWM signal with a lower duty cycle corresponding to a working position currently set by the user. The control method improves work efficiency, and meet the user's need of driving a fastener with a higher rotation speed at an early stage of operation. In the torsion control phase, the method according to the present invention can automatically use a suitable torsion to drive the fastener to better meet the user's needs in operation and enable the user to obtain an excellent experience of use. | 12-04-2014 |
20140365012 | IMPACT TYPE FASTENING TOOL AND CONTROL METHOD THEREOF - An impact type fastening tool, has a housing, a motor received in the housing, a main switch for controlling ON and OFF operations of the motor, an impact mechanism connected to the motor, and a control device. The control device comprises a current detecting module and a main control module connected to the current detecting module. The main control module can judge whether the impact mechanism performs an impact according to the signal detected by the current detecting module and control the motor to automatically stop in a preset time period after the impact mechanism performs an impact. | 12-11-2014 |
20150077085 | SWITCHED-CAPACITOR DC-DC CONVERTER - A high power density switched-capacitor DC-DC converter is disclosed. According to one aspect, the subject matter described herein includes a high power-density switched-capacitor DC-DC converter that includes: first and second voltage summing circuits, each voltage summing circuit producing an output voltage that is substantially equal to an input voltage; and a switching circuit connected between the first and second voltage summing circuits and configured to provide a DC voltage source as an input to the first and second voltage summing circuits, wherein the converter produces an output voltage that is the sum of the voltage produced by the first voltage summing circuit, the voltage provided by the DC voltage source, and the voltage produced by the second voltage summing circuit. | 03-19-2015 |
20150083448 | ELECTRIC TOOL AND METHOD FOR FASTENING A THREADED MEMBER BY USING IT - An electric tool and a method for fastening a threaded member by using it, the electric tool has a torque output system and a control system configured to, according to a fastening level selected by a user, invoke a corresponding data to drive the motor to enable it to output with designated single-time impact quantity and impact times. | 03-26-2015 |