| NABTESCO CORPORATION Patent applications |
| Patent application number | Title | Published |
|---|
| 20120031006 | RAILWAY PLATFORM DOOR DEVICE - Provided is a platform door device which makes it possible to reduce the length of time for a replacement operation when a panel-shaped portion of a door is damaged. The platform door device comprises a door, and a driving mechanism for moving the door forwardly and backwardly to close and open a gate on a platform. The driving mechanism includes a motor, a rotation body adapted to be rotated by the motor, and a driven body adapted to be driven according to the rotation of the rotation body so as to move the door, and the door has a panel-shaped main body, and a base segment detachably joined to the main body and attached to the driven body. | 02-09-2012 |
| 20120029859 | DAMPING TEST METHOD, CONTROL APPARATUS, HYDRAULIC SYSTEM, AND COMPUTER READABLE RECORDING MEDIUM - The control apparatus acquires an ideal velocity characteristic of a control surface, and the temperature of pressure oil of the actuator to be tested and the operating speed of the control surface when the actuator is attached to the control surface. The control apparatus corrects the ideal velocity characteristic of the control surface by using the pressure oil temperature and the control surface operating speed. The control apparatus sets an upper limit and a lower limit by using a predicted value for a fluctuation range for a fluctuation factor that causes a fluctuation of the control surface operating speed, with reference to the corrected ideal velocity characteristic, measures the pressure oil temperature and the operating speed by actuating the control surface, with the actuator to be tested placed in a damping mode, and determines whether the measured value falls within the range between the upper limit and the lower limit. | 02-02-2012 |
| 20120025015 | AIRCRAFT ACTUATOR CONTROL APPARATUS - A plurality of hydraulically operated actuators that drive a control surface and a plurality of control systems that respectively control the operation of the actuators are included. Each of the control systems includes a control valve, a state switching valve and a test orifice circuit. The test orifice circuit includes a test orifice used for testing the performance of an orifice. The state switching valve is provided such that its position can be switched between an actuator connection position, a damping position and a test orifice position. | 02-02-2012 |
| 20120001021 | AIRCRAFT ACTUATOR HYDRAULIC SYSTEM - When a loss or degradation in the function of one of a first aircraft central hydraulic power source and a second aircraft central hydraulic power source occurs, a controller performs a control so as to operate the other backup hydraulic pump, out of a first backup hydraulic pump and a second backup hydraulic pump, which is connected downstream of the other hydraulic power source, which is the other of the first and second aircraft central hydraulic power sources. Oil flowing through the other backup hydraulic pump is cooled by an oil cooler of the other hydraulic power source by operation of the other backup hydraulic pump in a state where the other hydraulic power source is being operated. | 01-05-2012 |
| 20110290938 | ACTUATOR CONTROL APPARATUS - Herein disclosed is an actuator control apparatus, comprising primary control means for producing a control signal used to control an operation of an actuator in accordance with an instruction signal indicative of an operation of the actuator, secondary control means for producing a control signal in accordance with the instruction signal; and switching means for selectively switching one of the primary control means and the secondary control means to the other, and in which the secondary control means is less in the number of functions than the primary control means, and each of components constituting the secondary control means is easier in fault verification than a component constituting the primary control means the most difficult in fault verification among all of components constituting the primary control means. | 12-01-2011 |
| 20110290353 | HYDRAULIC SYSTEM FOR AIRCRAFT ACTUATORS - An electric motor drives a variable capacity backup hydraulic pump that can supply pressure oil to an actuator when a loss or reduction occurs in the function of an aircraft central hydraulic power source. A power source unit rectifies electric power supplied from a variable frequency supply. A driver supplies the electric power from the power source unit, and drives the electric motor so as to rotate the pump at a predetermined constant rotational speed. The constant rotational speed is set, based on the change in the efficiency of each of the pump, the electric motor, and the driver with respect to the rotational speed of the pump, such that the overall efficiency, obtained as a product of these efficiencies, has a maximum value. | 12-01-2011 |
| 20110283692 | LIQUID PRESSURE MOTOR - A hydraulic motor | 11-24-2011 |
| 20110278392 | HYDRAULIC APPARATUS FOR AIRCRAFT ACTUATORS - A pump unit installed inside a wing includes a backup hydraulic pump that can supply pressure oil to an actuator when a loss or reduction occurs in the function of an aircraft central hydraulic power source and an electric motor that drives the pump. A wing structure portion forming the surface structure of the wing is provided with an inlet port and an exhaust port that are formed therethrough. The inlet port is provided so as to be opened and closed by an inlet port opening/closing portion, and the exhaust port is provided so as to be opened and closed by an exhaust port opening/closing portion. | 11-17-2011 |
| 20110275469 | GEAR TRANSMISSION - A gear transmission comprises an internal gear, an external gear, a first gear, a crankshaft, a two-stage gear and a second gear. The first gear is affixed to an end of the crankshaft, which eccentrically rotates one of the internal gear and the external gear. The two-stage gear comprises a center gear and an outer-toothed ring gear. The center gear meshes with the first gear. The outer-toothed ring gear surrounds the first gear. The second gear meshes with the outer-toothed ring gear and transmits torque from a motor to the two-stage gear. The two-stage gear is configured such that the center gear and the outer-toothed ring gear are each at least partially disposed in a common plane that crosses the rotational axis of the gear transmission. | 11-10-2011 |
| 20110266390 | HYDRAULIC APPARATUS FOR AIRCRAFT ACTUATORS - A pump unit installed inside a wing, and a panel body constituting part of a wing structure portion forming a surface structure of the wing are provided. The pump unit includes a backup hydraulic pump that can supply pressure oil to an actuator when a loss or reduction occurs in the function of an aircraft central hydraulic power source and an electric motor that drives this pump. Except for at least the panel body, the wing structure portion is formed from fiber reinforced plastics. The panel body is formed of a metallic material. | 11-03-2011 |
| 20110264242 | ACTUATOR CONTROL SYSTEM - An operation control apparatus includes a command generation portion that generates a command signal for commanding operation of a control surface, and first and second monitoring portions that monitor an abnormality of operation of first and second control portions, respectively, of the actuator control apparatus. The actuator control apparatus includes first and second control portions that generate a control signal for an actuator for driving the control surface and that are different in design, and a switching unit that switches the connection to the actuator from one of the first and second control portions to the other, when an abnormality is detected by the first and second monitoring portions. Accordingly, it is possible to monitor a generic failure, and realize redundancy enabling control of the overall operation of the actuator, from start to finish, when a generic failure has occurred, thus realizing further simplification and streamlining of the configuration. | 10-27-2011 |
| 20110256000 | LOCAL BACKUP HYDRAULIC ACTUATOR FOR AIRCRAFT CONTROL SYSTEMS - A backup system is provided that has a local electric motor and pump for some or all of hydraulic actuators. A local backup hydraulic actuator has two power sources, hydraulic as primary and electrical as backup. During normal operation, the hydraulic actuator receives pressurized fluid from a hydraulic system and the fluid flow to the chambers is controlled by a servo valve. If the hydraulic system fails, the electronic controller detects the failure by observing the signal indicative of the pressure from the pressure sensor, and the controller powers the local hydraulic pump to provide high pressure hydraulic fluid to the hydraulic actuator via the servo valve. | 10-20-2011 |
| 20110243739 | WINDMILL PITCH DRIVING APPARATUS - A windmill pitch driving apparatus is provided, which is capable of achieving improved durability as well as improved output torque and reduced size. The apparatus includes a fixing mechanism for fixing the output pinion to the output shaft. The fixing mechanism includes a positioning portion and a pressure-applying fixing portion. The positioning portion positions the other end side of the pinion with respect to the output shaft side. The pressure-applying fixing portion biases the pinion toward the output shaft in the direction of the axis P of the output shaft from the one end side and is fixed to the output shaft while applying pressure to the pinion. | 10-06-2011 |
| 20110232787 | STACK VALVE - A stack valve | 09-29-2011 |
| 20110220761 | ACTUATOR-LINK ASSEMBLY MANUFACTURING METHOD, ACTUATOR-LINK ASSEMBLY DESIGNING METHOD, AND ACTUATOR-LINK ASSEMBLY - In a material determining step, the material constituting an actuator and the material constituting a link are determined such that at least one of the materials contains fiber reinforced plastic. In a computing step, a computation model that defines the relationship between a control surface, the actuator, and the link is used to compute the change in gain margin with the change in a rigidity ratio, which is the ratio of the rigidity of the link to the rigidity of the actuator. The rigidities of the actuator and the link are determined in a rigidity determining step based on a result of the above-described computation, the shapes of the actuator and the link are determined in a shape determining step, and the actuator and the link are formed in a formation step, and are assembled in an assembly step. | 09-15-2011 |
| 20110207576 | GEAR TRANSMISSION - A gear transmission comprises an external gear and an internal gear that rotates eccentrically relative to the external gear while meshing with the external gear. At least one first recess is formed on an outer peripheral side of the internal gear so that at least a portion of a motor is disposed within the first recess, thereby shortening the length and width of the device that includes the motor and the gear transmission in the axial and radial direction, respectively. | 08-25-2011 |
| 20110182735 | WINDMILL PITCH DRIVING APPARATUS - A windmill pitch driving apparatus is provided, which is capable of achieving improved output torque and reduced size as well as reduced weight. Lubricating oil is enclosed in a casing | 07-28-2011 |
| 20110160876 | ACTUATOR CONTROL SYSTEM - An apparatus includes a command generation portion that generates the command signal, and a first monitoring portion that monitors an abnormality relating to actuation of the actuator control apparatus. The actuator control apparatus includes a control portion and a second monitoring portion. The control portion generates a control signal for controlling operation of the actuator in accordance with the above-described command signal. The second monitoring portion monitors an abnormality that relates to actuation of the actuator control apparatus and that is different in type from an abnormality monitored by the first monitoring portion. | 06-30-2011 |
| 20110139938 | AIRCRAFT REACTION LINK - An aircraft reaction link includes a pair of linear portions, a coupling portion that couples ends of the pair of linear portions on the same side to each other, a fulcrum shaft attachment portion, and a cylinder attachment portion. A metal frame that is made of a metallic material and that is provided so as to extend across the coupling portion and the pair of linear portions and a composite frame that is made of fiber-reinforced plastic and that is provided so as to extend at least in the pair of linear portions are bonded together, and thereby, the pair of linear portions and the coupling portion are formed. The metal frame is provided so as to extend from the fulcrum shaft attachment portion to the cylinder attachment portion. | 06-16-2011 |
| 20110132433 | GEAR TRANSMISSION AND PHOTOVOLTAIC POWER-GENERATING APPARATUS USING THE GEAR TRANSMISSION - A gear transmission comprises a crankshaft that eccentrically rotates one of an internal gear and an external gear. A first gear is attached to one end of the crankshaft. A ring gear having internal teeth meshes with the first gear. An intermediate gear meshes with external teeth of the ring gear. A second gear is attached to one end of an output shaft of a motor and meshes with the intermediate gear. The motor and the crankshaft are positioned, relative to the intermediate gear, on the same side in the axial direction of the gear transmission. | 06-09-2011 |
| 20110088798 | STACK VALVE HAVING BUCKET PARALLEL MOVEMENT FUNCTION - A stack valve | 04-21-2011 |
| 20110077117 | Eccentric Oscillating Type Speed Reducer - The present invention provides an eccentric oscillating type speed reducer that can more effectively be cooled with an extremely simple structure. | 03-31-2011 |
| 20110028259 | GEAR TRANSMISSION - A gear transmission comprises an internal gear member, a carrier, an external gear and a first shaft. An internal gear is formed on an inner circumference of the internal gear member. The carrier is positioned coaxially with an axis of the internal gear and is rotatably supported on the internal gear member. The external gear meshes with the internal gear and is supported on the carrier in an eccentrically rotatable manner. The first shaft extends through the carrier along the axis of the internal gear, is rotatably supported on the carrier and transmits torque inputted at one end to the other end thereof | 02-03-2011 |
| 20110015024 | GEAR DEVICE - A gear device has an outer cylinder fixed to a first mating member and a crankshaft inside the outer cylinder. An external gear is mounted to an eccentric portion of the crankshaft and meshes with internal teeth of the outer cylinder. A carrier is fixed to a second mating member. Rocking rotation of the external gear rotates the carrier coaxially to the outer cylinder. A cylindrical body is inserted in an axial through-hole of the carrier. The carrier has a first portion on one end of the cylindrical body and a second portion on an axially intermediate portion of the cylindrical body. The other end of the cylindrical body extends toward a corresponding mating member while protruding axially beyond the second portion. An outer diameter of remaining portions of the cylindrical body do not exceed an outermost diameter of the portion on which the first and second portions are fit. | 01-20-2011 |
| 20110015023 | ECCENTRIC SPEED REDUCER - An eccentric speed reducer is provided with which it is possible to achieve improved output torque without increasing the outer radial dimension of the casing. A tapered side is formed on at least part of a peripheral side surface of struts | 01-20-2011 |
| 20110014004 | BOLT AND NUT WITH ROTATION PROHIBITING MECHANISM - A set of a bolt and a nut having a rotation prohibiting mechanism comprises a foldable part ( | 01-20-2011 |
| 20110012314 | APPARATUS WITH A SEAL - An apparatus comprises first and second members that are rotatable relative to each other. The second member is disposed in a circular hole defined in the first member. A main oil seal is disposed between the second member and an inner circumferential surface of the circular hole of the first member. A secondary oil seal is movable along a center line of the circular hole of the first member and is positioned on the opposite side of the main oil seal from the lubricant. A dust seal is positioned on the opposite side of the secondary oil seal from the lubricant. An annular groove is formed on one of the inner circumferential surface of the circular hole and an outer circumferential surface of the second member. The secondary oil seal is movable from a reserve position, which opposes the groove, to a sealing position, which does not oppose the groove. | 01-20-2011 |
| 20110009981 | Knee Joint Including Manual Lock Mechanism and Artificial Thigh - The disclosure relates to a technology of a manual lock mechanism for manually switching over the oscillating motion of an upper member and a lower member at a knee joint between a locked condition and an unlocked condition. More particularly, the disclosure aims at a simple structure of the manual lock mechanism and a size reduction of the knee joint or an artificial leg including the manual lock mechanism. For these purposes, one of oscillating shafts for swingingly coupling the upper and lower members is regulated. Therefore, the manual lock mechanism includes an oscillating shaft including an irregular part and a lock member for regulating the movement of the oscillating shaft. The lock member can be switched over between a locked condition where the lock member is in contact with the irregular part of the oscillating shaft and the unlocked condition where it is separate from the irregular part. When the lock member is in the locked condition, force from the oscillating shaft is applied as compression load in the longitudinal direction of the lock member. | 01-13-2011 |
| 20110009224 | ECCENTRIC SPEED REDUCER - There is provided an eccentric speed reducer that achieves improved output torque without increasing the outer radial dimension of a casing. The strut includes, at the basal portion of a peripheral side surface where the strut is continuous with the base carrier, first curved portions and second curved portions that are in a form of a curved surface having a different radius of curvature. The first curved portions are provided at the supporting hole-facing sides of the strut that are disposed facing the rotation supporting holes. The second curved portions are provided between an outer side located in the strut at an outer position in the radial direction of the casing and on the side facing the inner circumference of the casing, and supporting hole-facing sides. The second curved portions have a larger radius of curvature than the first curved portions. | 01-13-2011 |
| 20100321676 | SENSOR FOR USE WITH AUTOMATIC DOOR - Object: To provide an automatic door sensor which is inexpensive and still capable of freely setting a detection area. | 12-23-2010 |
| 20100318245 | FLIGHT CONTROL SYSTEM - A flight control system for an aircraft includes a PCS generating a pilot control signal based on pilot operations of a stick control and others, an FCC for controlling flight control surfaces of the aircraft, a surface control device arranged for each flight control surface to control it based on a surface control signal transmitted from the FCC, and a data bus for connecting the FCC and the surface control device. The surface control device includes an ACE executing servo calculation process and outputting an actuator operation signal, and an actuator section for controlling hydraulic oil supplied to a hydraulic cylinder based on the actuator operation signal. A single flight control surface is controlled by a plurality of ACE and actuator section pairs, and the ACE includes a normal control section, a monitoring section, a backup control section, and the like. | 12-16-2010 |
| 20100270426 | AIRCRAFT ACTUATOR - An aircraft actuator is provided that can achieve a significant weight reduction, while securing a sufficient tensile strength and a sufficient buckling strength, even if it is provided with a reaction link in which large bent portions are formed. A reaction link is made of fiber reinforced plastic, and includes a pair of linear portions, a coupling portion, and a pair of bent portions. The cross section at the pair of linear portions, the coupling portion, and the pair of bent portions is formed as a hollow cross section. The outer cross sectional area of the hollow cross section at each of the pair of bent portions is configured to be larger than the outer cross sectional area of the hollow cross section at each of the pair of linear portions. | 10-28-2010 |
| 20100262320 | ACTUATOR MONITORING CIRCUIT, CONTROLLER, AND ACTUATOR UNIT - An actuator monitoring circuit | 10-14-2010 |
| 20100261567 | ECCENTRICALLY OSCILLATING SPEED REDUCER - There is provided an eccentrically oscillating speed reducer capable of reducing a number of parts more than that of a background art. | 10-14-2010 |
| 20100243084 | MULTIFUNCTION RELIEF VALVE AND AIRPLANE EMERGENCY HYDRAULIC POWER SOURCE UNIT HAVING THE SAME - A multifunction relief valve | 09-30-2010 |
| 20100236652 | VALVE UNIT - A valve unit | 09-23-2010 |
| 20100199796 | GEAR DEVICE AND TURNING PORTION STRUCTURE OF INDUSTRIAL ROBOT USING THE GEAR DEVICE - A gear device includes: an input gear fixed to an output shaft of a motor; an internal gear; an external gear which rotates while revolving around a central axis of the internal gear while meshing with the internal gear; a carrier supported rotatably within the internal gear and adapted to rotate about the central axis of the internal gear in conjunction with the rotation of the external gear; a plurality of crankshafts which are rotatably supported by the carrier and are adapted to cause the external gear to revolve around the central axis of the internal gear; transmission gears each provided on a central portion of each of the crankshafts; and a cylindrical gear which meshes with the transmission gears of the crankshafts and to which rotation is transmitted from the input gear, wherein the cylindrical gear is located on a radially inner side of an imaginary line passing through a center of rotation of each crankshaft and is rotatably supported by the carrier, and wherein the input gear and the cylindrical gear mesh with each other in an axially central portion of the carrier. | 08-12-2010 |
| 20100162838 | ELECTRIC ACTUATOR - An object of the present invention is to provide an electric actuator having a structure capable of reducing an external force or impact acting on an screw shaft when a piston rod is at a stretched position. An electric actuator | 07-01-2010 |
| 20100154579 | JOINT MECHANISM - There is provided a joint mechanism capable of restraining a rise in a temperature of a lubricant of a speed reducer, bringing the speed reducer into a stable operating state and preventing early destruction of the speed reducer. | 06-24-2010 |
| 20100139786 | Multi-Protection Valve - An object of the present invention is to allow a vehicle to run in the case where an air compressor connected to an input port fails so as to cause air leakage from the location of the failure, by preventing air in a parking brake circuit from leaking from the failure location through a bleed air flow path. In order to achieve the object, a multi-protection valve includes: a communication passage for communicating between an input chamber and a service output port so as to bypass a pressure control valve provided in correspondence with the service output port, the communication passage having a check valve for preventing air from flowing from the service output port into the input chamber and a throttle for restricting the air flow rate; and a bleed air flow path for communicating between the input chamber and the parking output port so as to bypass pressure control valves, the bleed air flow path having a second check valve for preventing air from flowing from the input chamber to the parking output port. The multi-protection valve further includes a third check valve provided between the input chamber and an input port to prevent air from flowing from the input chamber to the input port. | 06-10-2010 |
| 20100132350 | ELECTRIC ACTUATOR - An object of the present invention is to provide an electric actuator having a structure capable of reducing an external force or impact acting on a screw shaft when a piston rod is at a stretched position. | 06-03-2010 |
| 20100116077 | ROBOT ARM - In a robot arm having a closed link mechanism between a base and a hand, misalignment of the hand is inhibited during when the robot arm is used to move high temperature work. | 05-13-2010 |
| 20100113206 | ECCENTRIC OSCILLATING TYPE SPEED REDUCER AND APPARATUS FOR ROTATING STABILIZER SHAFT USING THE ECCENTRIC OSCILLATING TYPE SPEED REDUCER - The present invention reduces the manufacturing cost of an eccentric oscillating type speed reducer | 05-06-2010 |
| 20100074618 | OPTICAL PATH SWITCHING DEVICE - With the invention, it is possible to suppress losses of light for monitoring and enhances the optical confinement efficiency into an optical fiber for output over the related art. The optical path switching device | 03-25-2010 |
| 20100072987 | DISPLACEMENT SENSOR - A displacement sensor includes a primary coil ( | 03-25-2010 |
| 20100056316 | GEAR TRANSMISSION - An external gear has a number of teeth differing from a number of teeth of an internal gear, and is maintaining in a meshing state with the internal gear. A center through hole and an offset through hole are formed in the external gear. The center through hole is formed at the center of the external gear, whereas the offset through hole is formed at a position offset from the center of the external gear. Column-shaped member of a carrier passes through the offset through hole. A pair of supporting members of the carrier respectively supports each end of the column-shaped member. A pair of grooves is formed on a surface of a shaft of a crank member at positions between which an eccentric rotation member of the crank member is interleaved. First rolling elements and first outer races are arranged between the supporting members and the grooves. The shaft of the crank member is supported so as to be capable of rotating with respect to the carrier and incapable of moving in its axial direction. | 03-04-2010 |
| 20100024302 | SENSOR FOR AUTOMATIC DOOR SYSTEM, AND AUTOMATIC DOOR SYSTEM WITH SUCH SENSOR USED THEREIN - A light-emitter emits light into a door opening of an automatic door system. A light-receiver receives light from the light-emitter which has passed through the door opening and develops a light-reception indicative signal. A door controller causes the light-emitter to stop emitting light and, thereafter, start emitting light. An auxiliary sensor is judged to be operating in order when the light-receiver does not develop light-reception indicative signal in a state where the light-emitter is not emitting light, and, thereafter, develops a light-reception indicative signal when the light-emitter resumes emitting light; otherwise, the auxiliary sensor is judged to be out of order. | 02-04-2010 |
| 20100009801 | REDUCTION GEAR TRANSMISSION - A reduction gear transmission, a kind of eccentrically-oscillating-type reduction gear transmission, is provided with an internal gear, an external gear, a carrier, a crank member and a bearing mechanism. The external gear comprises a through hole at a position offset from its central axis. The carrier comprises a support shaft that extends into the through hole of the external gear. The crank member comprises a though hole into which the support shaft extends and an eccentric member that engages inside the through hole of the external gear. The central axis of the eccentric member is offset from a central axis of the support shaft. The bearing is disposed between the support shaft and the crank member, and supports the crank member such that the crank member is capable of rotating with respect to the central axis of the support shaft. In this reduction gear transmission, a clearance that extends along the support shaft between the carrier and the inner ring is narrower than a clearance between the carrier and an end face of the crank member. | 01-14-2010 |
| 20100004086 | REDUCTION GEAR TRANSMISSION AND SOLAR TRACKING PHOTOVOLTAIC POWER GENERATION UNIT UTILIZING THE SAME - A first reduction gear unit has a first input shaft that rotates in accordance with the rotation of an output shaft of a motor, a first external gear that revolves orbitally around an axis line of the first input shaft, and a first internal gear that has a number of teeth differing from the number of teeth of the first external gear. A second reduction gear unit comprises a crankshaft that rotates in accordance with the rotation of a first output shaft, a second external gear having a through hole formed at a center itself, a cylindrical member passing through the through hole of the second external gear, a second internal gear that has a number of teeth differing from the number of teeth of the second external gear, and a second output shaft that rotates around an axis line of the second internal gear. The first reduction gear unit is disposed between an outer circumferential surface of the second reduction gear unit and an inner surface of the cylindrical member. | 01-07-2010 |
| 20090272110 | LOCAL BACKUP HYDRAULIC ACTUATOR FOR AIRCRAFT CONTROL SYSTEMS - A backup system is provided that has a local electric motor and pump for some or all of hydraulic actuators. A local backup hydraulic actuator has two power sources, hydraulic as primary and electrical as backup. During normal operation, the hydraulic actuator receives pressurized fluid from a hydraulic system and the fluid flow to the chambers is controlled by a servo valve. If the hydraulic system fails, the electronic controller detects the failure by observing the signal indicative of the pressure from the pressure sensor, and the controller powers the local hydraulic pump to provide high pressure hydraulic fluid to the hydraulic actuator via the servo valve. | 11-05-2009 |
| 20090266934 | HYDRAULIC FLUID SUPPLY DEVICE AND ELECTRIC ACTUATOR - An electric actuator of the present invention includes a hydraulic fluid supply device and an actuator actuated in response to an input of hydraulic fluid from a variable-volume pump. The hydraulic fluid supply device includes an adjustable-speed motor, the variable-volume pump which is driven by the adjustable-speed motor and ejects hydraulic fluid, an electric motor control unit which controls the adjustable-speed motor so as to achieve an intended rotation speed, and a pump control unit which controls the variable-volume pump so that the ejection volume of the variable-volume pump decreases with an increase in the ejection pressure of the variable-volume pump. | 10-29-2009 |
| 20090258748 | SPEED REDUCTION DEVICE - A low-noise speed reduction device that is simple in structure, small-sized, and little in energy loss is provided. Two-stage gears, i.e., a large-diameter gear | 10-15-2009 |
| 20090247349 | Reduction Gear Transmission - The length of an inner meshing planetary gear type reduction gear transmission is reduced in its rotational axis line direction. | 10-01-2009 |
| 20090246044 | FLUID PRESSURE PUMP UNIT - The present invention provides a technology for downsizing fluid pressure equipment including a fluid pressure pump and a radiator. The hydraulic pump unit | 10-01-2009 |
| 20090243297 | SPEED REDUCER FOR USE IN YAW DRIVE APPARATUS FOR WIND POWER GENERATION APPARATUS, AND YAW DRIVE METHOD AND APPARATUS FOR WIND POWER GENERATION APPARATUS USING THE SPEED REDUCER - A yaw drive method of a wind power generation apparatus, in which a second gear engaged with a first gear attached to one of tower or a wind power generation unit supported to the upper end of the tower so as to be capable of yawing and supported to a tower or to the upper end of the tower is rotated by a drive motor attached to the other of the tower or the wind power generation unit for yawing the wind power generation unit. A drive energy, which is supplied to the drive motor for a predetermined time from when the supply of the drive energy to the drive motor begins to start, is made to be smaller than the drive energy supplied to the drive motor in a common yawing. | 10-01-2009 |
| 20090233750 | HOLLOW SPEED REDUCER - There is provided a speed reducer capable of shortening a length in an axial direction of a turning structure by arranging a plurality of small-sized motors. | 09-17-2009 |
| 20090219692 | Rack for housing a liquid-cooled electric unit - The present invention provides a rack suitable for housing a liquid-cooled electric unit. A rack | 09-03-2009 |
| 20090169343 | Drive Apparatus of Substrate Carrying Robot Including Cooling Circulation Path - There is provided a robot for carrying a substrate in which a contact type vacuum seal is cooled, the vacuum seal is prevented from exceeding a heat resistance temperature, and a trouble of leaking the atmosphere into a carrying chamber maintained in airtight is prevented from being brought about. | 07-02-2009 |
| 20090124446 | ECCENTRIC OSCILLATING GEAR MECHANISM AND INDUSTRIAL ROBOT JOINT CONSTRUCTION USING THE SAME - There is provided an eccentric oscillating gear mechanism including an internal gear, an external gear meshing with the internal gear, a crankshaft for moving the external gear eccentrically, and a carrier for supporting rotatably the crankshaft, the internal gear and the carrier being made to rotate relatively, wherein a cylindrical tube body, which penetrates the eccentric oscillating gear mechanism in an axial direction, is supported rotatably on the carrier. | 05-14-2009 |
| 20090118050 | Reduction Gear Transmission and Manufacturing Method Thereof - A reduction gear transmission is realized in which the total speed reduction ratio is adjusted to a desired value without making any changes to a rotation direction changing gear mechanism or a speed reduction unit. | 05-07-2009 |
| 20090112370 | VACUUM SYSTEM AND METHOD FOR OPERATING THE SAME - The present invention provides a vacuum system including a vacuum pump capable of operating at a rotation rate controlled appropriately when a predetermined process is performed in a vacuum chamber, which contributes to energy conservation. The vacuum system serves as a semiconductor manufacturing system comprising a vacuum pump controller which has a gas flow mode and an auto-tuning mode for determining a rotation rate of a vacuum pump unit to set the rotation rate to a target value lower by a predetermined value than the full operation rate of gas flow rate control means under the condition that pressure within the process chamber is vacuum pressure necessary for the gas flow mode. The vacuum pump controller has means for reducing the rotation rate of the vacuum pump unit from a rated rotation rate in the auto-tuning mode under the condition that pressure within the process chamber is vacuum necessary for the gas flow mode, to determine whether or not the operation rate of an APC valve reaches a target value, and means for storing, as the rotation rate necessary for the gas flow mode, the rotation rate of the vacuum pump unit, which is obtained when it is determined that the operation rate of the APC valve reaches the target value. | 04-30-2009 |
| 20090094976 | VARIABLE HYDRAULIC MOTOR DRIVING DEVICE - A hydraulic motor | 04-16-2009 |
| 20090062053 | Rotation Output Device - A compact rotation output device is realized by disposing an output shaft of a reduction gear transmission coaxially with an axis line of a rotating disk while simultaneously ensuring a space in a rear face of the rotating disk through which a columnar bar or wiring etc. can pass. | 03-05-2009 |
| 20090051228 | ACTUATOR UNIT - An actuator unit | 02-26-2009 |
| 20090031633 | AUTOMATIC DOOR SYSTEM - [Subject] Whether interruption is present in the connections of automatic door constituting units is detected. | 02-05-2009 |
| 20090019961 | Turning Portion Structure of Industrial Robot - To facilitate an integrating operation and to make fabricating cost inexpensive. An idle gear for transmitting rotation of an input gear of a drive motor to a cylindrical gear is rotatably supported by an input side end portion of a specific one crank pin, and therefore, the idle gear may simply be supported by the crank pin, further, a length in an axial direction of the cylindrical gear brought in mesh with both of the idle gear the input gear is sufficiently to a degree of being more or less longer than a distance between remote side ends of the two gears. | 01-22-2009 |
| 20090017955 | Reduction Gear Box - The manufacturing process of a reduction gear box in which a rotation direction converting part and a reduction part are joined together is simplified by unitizing both the rotation direction converting part and the reduction part and by manufacturing the reduction gear box by assembling the rotation direction converting unit and the reduction unit. | 01-15-2009 |
| 20080298948 | Heavy Object Turning Apparatus - A technique of a heavy object turning apparatus that is compact, is enabled to reduce the distance between the center of gravity of a heavy object and a pivot positioned on an axis, and is configured so that a turning arm and a drive unit has a length in the direction of an axis passing through the pivot around which the heavy object is turned. A control unit fixes a support base onto a stand. An orthogonal axis reduction gear serves as an anterior reduction gear and has a configuration in which an output shaft is on an axis of a planetary gear type reduction gear serving as the posterior reduction gear. An input shaft is perpendicular to the axis. The orthogonal reduction gear is constituted by a hypoid reduction gear or a worm-geared reduction gear. A motor is disposed on the bottom surface of the orthogonal reduction gear. | 12-04-2008 |
| 20080295623 | Speed Reducer to be Attached to Articulated Portion Industrial Robot - A speed reducer | 12-04-2008 |
| 20080287240 | Structure of Swing Part of Industrial Robot - An object of the invention is to effectively prevent surface abrasion in an eccentric part | 11-20-2008 |
