Patents Examined by Michael Quandt
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Patent number: 9810247Abstract: A rotary actuator is equipped with an end cover disposed on one end surface of a cylinder main body, a first plug that is engaged with a wall surface constituting an opening on another end side of a first cylinder hole, and a second plug that is engaged with a wall surface constituting an opening on another end side of a second cylinder hole. A first port communicating with a first front cylinder chamber and a second rear cylinder chamber, and a second port communicating with a second front cylinder chamber and a first rear cylinder chamber are formed in the end cover.Type: GrantFiled: August 5, 2015Date of Patent: November 7, 2017Assignee: SMC CORPORATIONInventor: Toshikazu Tabuchi
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Patent number: 9803771Abstract: A latch device (12) for a hydraulic valve (10) is proposed. The latch device (12) comprises a housing (22) and a latch shaft (26), which is supported such that it can move in the housing (22). In order to create a latch device (12), independent of the hydraulic provisioning, the provision of at least one magnetizable ring beam arrangement (38), which is supported on the latch shaft (26), and an electric solenoid arrangement (40), located on the housing (22) around the ring beam arrangement (38) is also proposed, wherein by the supply of current to the solenoid arrangement (40), a positioning force can be produced on the ring beam arrangement (38). Furthermore, a hydraulic valve (10) with the corresponding latch device (12) and a hydraulic arrangement (92) for such a valve (10) are also proposed.Type: GrantFiled: August 16, 2011Date of Patent: October 31, 2017Assignees: Deere & Company, Bucher Hydraulics GmbHInventors: Martin Trinler, Wolfgang Todt, Holger Lüüs
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Patent number: 9791015Abstract: A device recovers energy in working machines with at least one power drive actuated to move a load mass back and forth and with an energy storage system (16) absorbing the energy released in the movement of the load mass in one direction and making it available for a subsequent movement in the other direction. The energy storage system includes an accumulator cylinder (16) mechanically coupled to the load mass and storing pneumatic pressure energy for movement in one direction. For movement in the other direction, the accumulator cylinder acts as an auxiliary working cylinder supporting the power drive and converting the stored pressure energy into driving force.Type: GrantFiled: November 29, 2010Date of Patent: October 17, 2017Assignee: HYDAC TECHNOLOGY GMBHInventors: Peter Kloft, Daniel Feld, Herbert Baltes, Frank Bauer
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Patent number: 9771956Abstract: An actuator converts the pressure of a fluid into a change in the length of the actuator and is formed such that an elastic tube is spirally wound. The tube is wound around the axis of the actuator. One or more grooves are spirally formed on the outer surface of the tube along the axial center of the tube. When the fluid contained in the inside of the tube is pressurized, a torsional force is applied to the tube along the spirals of the one or more grooves and causes the actuator to contract in the axial direction. Even when an external force acts in a direction in which the actuator is bent, the volume of the inside of the tube is not substantially varied. Accordingly, the actuator can be allowed to freely move in a bending direction.Type: GrantFiled: August 23, 2016Date of Patent: September 26, 2017Assignee: PANSONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Katsuhiko Asai, Takayuki Nagata, Kazuo Inoue
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Patent number: 9765504Abstract: Disclosed is a hydraulic system for performing land preparation works by means of a simultaneous boom-up and arm-in operation.Type: GrantFiled: May 21, 2012Date of Patent: September 19, 2017Assignee: VOLVO CONSTRUCTION EQUIPMENT ABInventor: Man-Seuk Jeon
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Patent number: 9726269Abstract: A drive train configuration is disclosed. The drive train incorporates an engine having hydraulic pumps contained substantially inside the engine housing and with an engine shaft driving the hydraulic pumps. A porting block or center section is mounted to the engine housing to provide hydraulic communication between the hydraulic pumps located inside the engine housing and hydraulic motors located outside the engine housing. The hydraulic motor output shafts drive gears connected to axles to propel a vehicle.Type: GrantFiled: January 5, 2015Date of Patent: August 8, 2017Assignee: Hydro-Gear Limited PartnershipInventor: Michael L. Bennett
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Patent number: 9664168Abstract: A hydrostatic power unit (2) comprises a variable displacement machine with a continuously variable displacement volume and is operated as a pump and motor and is in a drive connection with an internal combustion engine (3). When operated as a pump, the power unit sucks hydraulic fluid out of a tank (9) and delivers into a delivery side (P), and, when operated as a motor, functions as a hydraulic starter to start the internal combustion engine (3). When operated as a motor, the power unit is supplied with hydraulic fluid from a hydraulic accumulator (30). The displacement volume of the power unit (2) is set by a displacement volume control device (60) actuated by a positioning piston device (61) supplied with hydraulic fluid from a charging pressure circuit (23). The power unit (2) includes a supplemental positioning piston device (80) in an operative connection with the displacement volume control device (60) and which is actuated directly by the pressure present in the hydraulic accumulator (30).Type: GrantFiled: August 5, 2014Date of Patent: May 30, 2017Assignee: Linde Hydraulics GmbH & Co. KGInventors: Lukas Krittian, Thomas Loeffler, Alfred Langen, Rolf Lasaar
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Patent number: 9663090Abstract: Systems and methods for a vehicle brake booster having first and second chambers separated by a diaphragm coupled to a brake pedal are provided. In one example approach, a method comprises applying an exhaust pressure from a vacuum pump to a first chamber of the brake booster, and applying a vacuum pressure from the vacuum pump to a second chamber of the brake booster.Type: GrantFiled: November 26, 2012Date of Patent: May 30, 2017Assignee: Ford Global Technologies, LLCInventor: Ross Dykstra Pursifull
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Patent number: 9663088Abstract: An electric booster including a plunger movable by operation of a brake pedal, an electric motor controlled based on a relative displacement between the plunger and the linear motion member, which is detected by a relative displacement sensor, and a ball and screw mechanism. The linear motion member pushes a piston of a master cylinder through a reaction member, thereby generating a brake force. Part of a reaction force from the master cylinder is fed back to the brake pedal through the reaction member. When a reference position sensor detects that a relative position of the plunger to the linear motion member coincides with a predetermined reference position, a detection value of the relative displacement sensor is stored as a relative displacement reference value, and relative displacement between the plunger and the linear motion member is determined.Type: GrantFiled: September 21, 2011Date of Patent: May 30, 2017Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Toshio Takayama, Masaru Sakuma
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Patent number: 9651068Abstract: A double valve includes a first unitary valve assembly and a second unitary valve assembly. Each unitary valve assembly includes a first outlet port, a second outlet port, and a spool. A first pilot assembly and a second pilot assembly are coupled to the first unitary valve assembly and the second unitary valve assembly, respectively. A plate is coupled to the unitary valve assemblies and includes a passage to provide a first common outlet passage that is coupled to the respective first outlet ports of the unitary valve assemblies and a second common outlet passage that is coupled to the respective second outlet ports of the unitary valve assemblies. When the spools are in a first position, fluid flows through the first common outlet passage, and when the spools are in a second position, the fluid flows through the second common outlet passage.Type: GrantFiled: April 21, 2014Date of Patent: May 16, 2017Assignee: Ross Operating Valve CompanyInventors: José Carlos Bento, Eric Oden Cummings
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Patent number: 9605690Abstract: A hydraulic system, wherein an actuating cylinder and an accelerating cylinder each includes a piston, a rod, and a tube. When the rod of the actuating cylinder extends in an unloaded condition, a circuit is configured such that oil discharged from the bottom-side section of the accelerating cylinder is supplied to the bottom-side section of the actuating cylinder through a bottom line. When the rod of the actuating cylinder extends in a loaded condition, a circuit is configured such that oil supplied to the bottom line without passing through the accelerating cylinder is supplied to the bottom-side section of the actuating cylinder. The circuit for the unloaded condition and the circuit for the loaded condition is switched based on a pressure sensing in the bottom line.Type: GrantFiled: January 31, 2012Date of Patent: March 28, 2017Assignee: TAGUCHI INDUSTRIAL CO., LTD.Inventor: Yuichi Taguchi
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Patent number: 9574579Abstract: A method of combining outputs of a plurality of fluid pumps includes receiving an input signal from an input device. The input signal is adapted to control a function of a work vehicle. An actuation signal is sent to a first direction control device of a first actuator assembly. The first actuator assembly is in selective fluid communication with a first pump assembly. A position of a second direction control valve of a second actuator assembly is received. The second actuator assembly is in selective fluid communication with a second pump assembly. A selector valve that is in fluid communication with a cavity of a poppet valve assembly is actuated so that the second pump assembly is in fluid communication with the first actuator assembly when the second direction control valve is in a neutral position.Type: GrantFiled: April 27, 2011Date of Patent: February 21, 2017Assignee: Eaton CorporationInventor: Philip J. Dybing
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Patent number: 9568100Abstract: A piston assembly for a transmission includes a piston housing and a release spring. The piston housing has a bore including a first radial wall and a circumferential wall. The release spring has a first radially outwardly extending finger portion, a second radially outwardly extending finger portion, and a conical portion. The first finger portion is for pressing engagement with the first radial wall and the second finger portion is for pressing engagement with the circumferential wall. The conical portion is disposed radially inward of the first and second finger portions. In an example embodiment, the piston housing includes a second radial wall for pressing against a clutch pack for the transmission. In some example embodiments, the piston assembly includes a seal plate, fixed to the piston housing and arranged to retain at least one piston seal.Type: GrantFiled: March 21, 2013Date of Patent: February 14, 2017Assignee: Schaeffler Technologies AG & Co. KGInventor: Scott Strong
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Patent number: 9541082Abstract: In an oil-well-pump driving hydraulic system capable of avoiding occurrence of cavitation, at least a bidirectional variable displacement piston pump, a discharge rate detection portion, a discharge pressure detection portion, and a proportional solenoid control valve are contained as a single unit structure in a same housing as a pump body. The pump body includes: a connection portion provided on a side surface of the housing and to which a pump discharge passage of an external pilot hydraulic circuit is connected; and a second pilot passage that introduces an external pilot pressure from the connection portion to a pilot passage between the discharge passage of the piston pump and the proportional solenoid control valve.Type: GrantFiled: March 14, 2013Date of Patent: January 10, 2017Assignee: YUKEN KOGYO CO., LTD.Inventors: Hirokazu Hiraide, Akihiro Hayashi
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Patent number: 9540971Abstract: An end cap assembly for a reciprocating air motor comprises a pilot valve and an end cap body. The pilot has a valve stem. The end cap body comprises a central bore for receiving an air motor rod, a valve bore in which the pilot valve is disposed such that the valve stem extends through the end cap body, and an air port extending through the end cap body. The air port has a contour to direct air toward the valve stem.Type: GrantFiled: April 25, 2012Date of Patent: January 10, 2017Assignee: Graco Minnesota, Inc.Inventors: Mark L. Bauck, Zaixing You, Xueshui Wu, Jin Tian
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Patent number: 9511875Abstract: A ram air turbine actuator includes a piston rod arranged in a cylinder. The cylinder and piston rod are configured to move longitudinally relative to one another between retracted and deployed positions. An annular space provided between the cylinder and piston rod, and a fluid flow regulating feature is provided in the piston rod. The fluid flow regulating feature is progressively blocked from the retracted position to the deployed position. The RAT actuator is deployed by initiating a deploy sequence and reducing a volume of an annular space. Fluid flow is forced from the annular space through a flow regulating feature to a cavity. The size of the flow regulating feature reduces to damp the actuator during the deploy sequence.Type: GrantFiled: June 6, 2012Date of Patent: December 6, 2016Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Gary Sasscer, Richard Schweighart
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Patent number: 9494167Abstract: The hydraulic apparatus includes: at least a pumping device for pumping a fluid at a first pressure; at least a user device of the fluid at the first pressure; at least an emergency supply device connectable to the user device activating a connection; at least an activation device of the connection that can be operated at a second pressure of the fluid different from the first pressure and interposed between the user device and the emergency supply device, the activation device having an emergency configuration wherein both the pumping device and the emergency supply device are connected to the user device.Type: GrantFiled: March 13, 2008Date of Patent: November 15, 2016Assignee: Safim S.p.AInventors: Enrico Mamei, Eronne Mamei, Omer Mamei
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Patent number: 9494170Abstract: A hydraulic system for a vehicle includes a variable displacement pump configured to pressurize a fluid based on a pump stroke, a clutch, and a controller that is coupled to the variable displacement pump and the clutch. The clutch is positioned to selectively couple the variable displacement pump with an engine when engaged and selectively decouple the variable displacement pump from the engine when disengaged. The controller is configured to generate a first command signal to decrease the pump stroke and thereafter generate a second command signal to disengage the clutch.Type: GrantFiled: February 20, 2014Date of Patent: November 15, 2016Assignee: Oshkosh CorporationInventor: Yanming Hou
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Patent number: 9441775Abstract: When a male member is inserted into a female member to connect a first joint portion of a hydraulic joint structure and a second joint portion thereof, a first open end portion of a first oil passage of the male member and a first open end portion of a first oil passage of the female member are connected at a first axial position, and a second open end portion of a second oil passage of the male member and a second open end portion of a second oil passage of the female member are connected at a second axial position. Thus, two hydraulic oil lines can be easily connected at the same time.Type: GrantFiled: April 16, 2012Date of Patent: September 13, 2016Assignee: Kabushiki Kaisha OguraInventor: Kiyoshi Kimura
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Patent number: 9441648Abstract: A control system for a hybrid construction machine includes first and second main pumps, first and second supply passages, first and second circuit systems, a hydraulic motor, a motor generator, an assist pump, a joint passage connected to the assist pump and branching off, first and second logic valves, and a switching valve. The switching valve switches between a state where the assist pump is connected to the second supply passage and a state where the second main pump is connected to the hydraulic motor. A bypass passage branches off from the other branch passage at the downstream of the switching valve. The bypass passage is connected to the second supply passage on the downstream side of the second logic valve.Type: GrantFiled: January 21, 2013Date of Patent: September 13, 2016Assignee: KYB CorporationInventors: Shunsuke Fukuda, Nobuyoshi Yoshida