Assignee: Kayaba Industry Co., Ltd.

Location: Tokyo, JP
No. of applications: 82

Application No.	Application Title	Issue Date
20120067444	LEVELING VALVE A contracted portion having an axial length is formed in the spool hole and a large diameter portion having an axial length is formed in the spool within the spool such that an annular gap is formed there-between. A valve body closes an opening portion of the spool hole...	03/22/2012
20120048664	MULTI-CYLINDER HYDRAULIC SHOCK ABSORBER A multi-cylinder hydraulic shock absorber (D) expands and contracts in accordance with expansion and contraction of a working chamber (R1, R2) provided in a cylinder (1) and having a working fluid sealed therein. An outer periphery of the cylinder (...	03/01/2012
20120031262	HYDRAULIC CYLINDER A hydraulic cylinder includes a piston that defines a driving pressure chamber and a cushion pressure chamber within a cylinder tube, an air chamber defined inside a hollow piston rod, an orifice that leads a working fluid in the cushion pressure chamber into the air ch...	02/09/2012
20120024145	HYDRAULIC MOTOR DRIVING DEVICE A motor capacity change-over actuator 10 varies a capacity of a hydraulic motor 1 in accordance with the inflow/outflow of a working fluid into/out of a drive pressure chamber 72. A motor capacity change-over valve 20 supplies the working flu...	02/02/2012
20110271669	HYBRID CONSTRUCTION MACHINE A hybrid construction machine includes a control valve provided in a flow passage that connects an actuator to a regenerative hydraulic motor, an opening of which is controlled by a pilot pressure led to a pilot chamber thereof; and a solenoid pilot control valve that l...	11/10/2011
20110265467	CONTROL DEVICE FOR HYBRID CONSTRUCTION MACHINE A control device for a hybrid construction machine includes a discharge pressure introduction passage that leads a discharge pressure from a variable volume pump to a regulator, and a load pressure introduction passage that leads one of a maximum load pressure of respec...	11/03/2011
20110247906	DAMPING MECHANISM A damping mechanism (1) generates a damping force in response to movement of a fluid between a first fluid chamber (R1) and a second fluid chamber (R2) of a fluid pressure shock absorber. The damping mechanism (1) comprises a partition wall m...	10/13/2011
20110240146	CONTROL DEVICE FOR HYBRID CONSTRUCTION MACHINE A regulator that performs control such that a tilt angle of a variable volume pump increases as a pilot pressure in a pilot flow passage decreases is provided, and when a controller determines that all of a plurality of operation valves for controlling a flow of a disch...	10/06/2011
20110192278	FLUID PRESSURE CYLINDER When a fluid pressure cylinder (1) is in a maximum expansion state, a piston (40) contacts a cylinder head (30). The cylinder head (30) is fixed to a cylinder tube (10) by a plurality of head bolts (12). The cylinder head (30...	08/11/2011
20110167928	Torque sensor A torque sensor detects a torque acting on a torsion bar provided between a first shaft and a second shaft on the basis of a magnetic flux density led to a rotating magnetic circuit portion from a magnetism generating portion. The magnetism generating portion includes a...	07/14/2011
20110101632	VEHICLE HEIGHT ADJUSTING DEVICE A displaceable spring seat (2) supporting one end of a vehicle suspension spring (S) is supported by a fluid pressure of an operation chamber (J). A screw pump (P) supplying a working fluid to the operation chamber (J) includes a pump chamber (L) defined within a...	05/05/2011
20110095462	Fluid pressure shock absorber A fluid pressure shock absorber comprises a cylinder 3 disposed in a tube 2 and having a base supported by the tube 2 and a head member 31 fitted onto a tip of the cylinder 3. A hole 2b is formed in the tube 2 faci...	04/28/2011
20110088797	Fluid-pressure actuator unit A fluid-pressure pump 2 rotated by an electric motor 9 drives a fluid-pressure cylinder 3. A discharge flow restrictor 15 is provided in a discharge passage 12 through which a working fluid from the fluid-pressure pump 2 is supp...	04/21/2011
20110088488	Power steering device A vehicle power steering device 1 comprises an input shaft 11, a torque sensor 2 that magnetically detects an input torque input into the input shaft 11, and a position sensor 5 that detects a reference rotation position of the input s...	04/21/2011
20110088385	Fluid pressure actuator unit A fluid pressure cylinder (3) is connected to a discharge port (24) of a fluid pressure pump (2). A suction port (25) of the fluid pressure pump (2) is connected to a tank (10) via a suction passage (11) in which a flow r...	04/21/2011
20110072810	CONTROLLER OF HYBRD CONSTRUCTION MACHINE Disclosed is a controller of a hybrid, construction machine wherein electric power is generated by utilizing the standby flow rate of first and second main pumps, and the standby flow rate is converted into energy. Pilot channels are connected to the upstream side of on...	03/31/2011
20110071738	CONTROLLER OF HYBRID CONSTRUCTION MACHINE Effective use of energy is provided by recovering energy produced during braking in operation of a rotation motor RM alone for electric generation. A control unit C has functions: of operating a passage-resistance control unit (51) to reduce the passage resistanc...	03/24/2011
20110067564	HYDRAULIC CYLINDER A hydraulic cylinder includes a piston unit inside a cylinder to be free to slide within the cylinder; and a piston rod having the piston unit fixed to one end thereof and another end thereof projecting from the cylinder. The piston unit is inserted into a small diamete...	03/24/2011
20110060491	Device For Controlling Hybrid Construction Machine When an actuator in an operational mechanical system having a short continuous operation time is operated using a small-capacity electric motor (MG), an electric motor is rotated in the range exceeding a rated capacity, and during traveling with a long continuous operat...	03/10/2011
20110056783	SHOCK ABSORBING DEVICE A shock absorbing device includes a cylinder. A partition wall member is inserted into the cylinder to be free to slide and partitions an interior of the cylinder into two operating chambers. A passage connects the two operating chambers. A free piston is inserted into ...	03/10/2011
20110056781	Fluid pressure shock absorber A piston (8) of a fluid pressure shock absorber (D, D1) partitions a first fluid chamber (R1) and a second fluid chamber (R2) in a cylinder (5) filled with a fluid. A pipe member (3) inserted into a housing (2, 30) has a ...	03/10/2011
20110049811	Liquid-operated cylinder A piston seal (50) of a liquid-operated cylinder includes a main seal ring (51) that slidably contacts the inner circumferential surface (11) of the cylinder tube (10); an O-ring (52) that imparts a force causing an outer circumference...	03/03/2011
20110025000	SUSPENSION SYSTEM FOR VEHICLE A suspension system for a vehicle, including: an electromagnetic actuator configured to generate an actuator force and including a sprung-side unit supported by a sprung portion, an unsprung-side unit supported by an unsprung portion, a screw mechanism, and an electroma...	02/03/2011
20110024247	DAMPING FORCE GENERATING MECHANISM FOR HYDRAULIC SHOCK ABSORBER A port (2a, 2b) allows a fluid to flow from a first fluid chamber (41, 42) to a second fluid chamber (42, 41) separated by the piston (1) of a shock absorber via a damping valve (10a, 10b). A f...	02/03/2011
20110000319	Torque sensor In a torque sensor that detects torque acting on a torsion bar in accordance with the density of magnetic flux guided to a rotating magnetic circuit portion from a magnetism generating portion, the magnetism generating portion includes a back yoke that rotates together ...	01/06/2011
20100320655	Shock absorber A shock absorber that absorbs a vibration using a working fluid charged into a first chamber and a second chamber comprises a tube body, an inserted body, a tip end of which is inserted into the tube body from an end portion of the tube body, and a partition wall portio...	12/23/2010
20100294604	Damping mechanism A damping mechanism (1) that generates a damping force in response to a liquid flow between a first liquid chamber (R1) and a second liquid chamber (R2) comprises a partitioning member (2) separating the first liquid chamber (R1) and t...	11/25/2010
20100202913	GEAR PUMP A gear pump (1) that discharges a fluid by rotating while a pair of gears (11, 12) are intermeshed includes a body (2) into which the respective gears (11, 12) are incorporated, a housing (3, 4) that contacts the body (2), a num...	08/12/2010
20100201052	Gas Spring A gas spring is intended to permanently maintain the sealing performance of a lip in a dust seal without being affected by pressure from a gas sealed inside the spring. A rod body is operates in conjunction with a cylinder body with a gas of a predetermined pressure sea...	08/12/2010
20100200343	ELECTROMAGNETIC SHOCK ABSORBER FOR VEHICLE An electromagnetic absorber (10) for a vehicle including (a) a threaded rod (78) which is disposed on one of a sprung portion and an unsprung portion and which has a threaded groove (76) formed in its outer circumferential portion and an axial groov...	08/12/2010
20100135827	TANDEM PISTON PUMP In a tandem piston pump (1) from which pump discharge pressure from four systems is extracted, a tilt axis direction of a front swash plate (14) and a tilt axis direction of a rear swash plate (54) are different to each other, respective discharge p...	06/03/2010
20100123535	Solenoid actuator A solenoid actuator (1) comprises a case (9) made of a magnetic material and housing a coil (12) wound on a bobbin (11), and a pressure tube (17) made of a non-magnetic material and fitted into a hollow portion of the bobbin (11...	05/20/2010
20100115938	SPEED CONTROL DEVICE FOR HYDRAULIC ACTUATOR A working oil supply flow rate to hydraulic actuators (7-9) is controlled on the basis of target operating speeds (C7-C9). When a state in which one of the hydraulic actuators (7-9) has substantially stopped operating is detecte...	05/13/2010
20100111727	Solenoid actuator A solenoid actuator (1) attached to hydraulic equipment comprises a shaft (5) connected to the hydraulic equipment, a plunger (4) fixed to the shaft (5), a coil (12) which magnetically drives the plunger (4), and a first bearing...	05/06/2010
20100109825	Solenoid actuator A solenoid actuator (1) attached to a hydraulic equipment comprises a shaft (5) connected to the hydraulic equipment, a plunger (4) fixed to the shaft (5), a coil (12) which magnetically drives the plunger (4), and a first beari...	05/06/2010
20100108430	Power steering device A power steering device for a vehicle includes an input shaft (1) linked to a steering wheel, an output shaft (2) linked to a vehicle wheel, a torsion bar (3) that connects the input shaft (1) to the output shaft (2), and a cylindrical...	05/06/2010
20100083822	OPPOSING SWASH PLATE PISTON PUMP/MOTOR A first swash plate (30) and a second swash plate (40) are disposed on either side of a cylinder block (4), and a plurality of cylinders (6) are disposed in the cylinder block (4). A first piston (8) and a second piston (9	04/08/2010
20100042301	SPEED RATIO CONTROL DEVICE AND METHOD FOR WORKING VEHICLE A working vehicle that uses the output of an internal combustion engine (30) as a working power and a traveling power includes an accelerator pedal (1) that increases a rotation speed of the engine (30) when depressed and a transmission (40) ...	02/18/2010
20100034681	Variable capacity vane pump A variable capacity vane pump (100) has a pump housing (10) having a high-load bearing part (10a) on which a higher load is exerted than another part when the pump vane pump (100) operates. A control valve (21) for varying a cap...	02/11/2010
20100034630	HYDRAULIC SHOVEL A hydraulic shovel (1) in which a vehicle body (2) is provided revolvably on a traveling body (6) includes a boom (3) connected rotatably to the vehicle body (2), an arm (4) connected rotatably to the boom (3), a bucket (...	02/11/2010

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Assignee: Kayaba Industry Co., Ltd.