Condition Responsive Fluid Control Patents (Class 417/270)
  • Patent number: 10808675
    Abstract: An axial piston machine may include a rotor rotatably mounted in a housing. A plurality of cylinders may be arranged in a ring around the rotor. A plurality of pistons may each be arranged within each of the plurality of cylinders and may be constructed and arranged to selectively translate within the plurality of cylinders. A plurality of inlet openings may be defined in a cylinder head and at least one outlet opening may be defined in the housing. The plurality of cylinders may be in operative communication with the plurality of inlet openings and the at least one outlet opening. An inlet channel may be defined in the cylinder head and may extend to each of the plurality of inlet openings. An outlet channel may be defined in the housing and may be in operative communication with the at least one outlet opening. A bypass channel may be defined in the housing and may extend from the cylinder head into one of the outlet channel or a swashplate space.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: October 20, 2020
    Assignee: MAHLE INTERNATIONAL GMBH
    Inventors: Michael Bucher, Mirko Guenther, Michael Hoetger, Michael Kreisig, Hannes Marlok, Falk Schneider
  • Patent number: 10429105
    Abstract: Embodiments disclosed herein relate to devices, systems, and methods for cooling and/or heating a medium as well as cooling and/or heating an environment containing the medium. More specifically, at least one embodiment includes a heat pump that may heat and/or cool a medium and, in some instances, may transfer heat from one location to another location.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: October 1, 2019
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Harumichi Arthur Kariya, Jeffrey P. Koplow, Wayne Lawrence Staats, Jr.
  • Patent number: 10190556
    Abstract: A cryogenic LNG fuel system is provided that includes a tank for storing LNG and a LNG fill system including a LNG inlet passage for directing a flow of LNG into the tank. A cryogenic pump is in fluid communication with the tank and includes a pumping element at least partially immersed in the LNG for directing the LNG out of the tank and a seal. A lubricant system is provided that includes a lubricant reservoir and a lubricant inlet passage in communication with the lubricant reservoir and the LNG inlet passage. The lubricant system is adapted to introduce the lubricant into the flow of LNG in the LNG inlet passage such that at least a portion of the lubricant is entrained in the LNG in the LNG inlet passage and carried into the tank.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: January 29, 2019
    Assignee: Caterpillar Inc.
    Inventors: Joshua T. Perko, Dana R. Coldren, Glenn B. Cox
  • Patent number: 10119544
    Abstract: An automotive electric liquid pump includes a pump wheel, an EC-motor which directly drives the pump wheel, and a cover disk. The EC-motor comprises a wet motor rotor. The wet motor rotor comprises a ring-like motor rotor cavity, and a motor rotor body comprising a cylindrical rotor body section. The cylindrical rotor body section is permanently magnetized and surrounds a motor rotor cavity which is ring-like. The cover disk is arranged at a longitudinal rotor end opposite to the pump wheel. The cover disk closes the motor rotor cavity.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: November 6, 2018
    Assignee: PIERBURG PUMP TECHNOLOGY GMBH
    Inventors: Alessandro Malvasi, Robin Wegener
  • Patent number: 10094372
    Abstract: A fluid-working machine has a plurality of working chambers, e.g., cylinders, of cyclically changing volume, a high-pressure fluid manifold and a low-pressure fluid manifold, at least one valve linking each working chamber to each manifold, and electronic sequencing means for operating said valves in timed relationship with the changing volume of each chamber, wherein the electronic sequencing means is arranged to operate the valves of each chamber in one of an idling mode, a partial mode in which only part of the usable volume of the chamber is used, and a full mode in which all of the usable volume of the chamber is used, and the electronic sequencing means is arranged to select the mode of each chamber on successive cycles so as to infinitely vary the time averaged effective flow rate of fluid through the machine.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: October 9, 2018
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Uwe Bernhard Pascal Stein, Niall James Caldwell, William Hugh Salvin Rampen, Jonathan Paul Almond
  • Patent number: 10087962
    Abstract: An electro hydrostatic actuator (EHA) comprises a hydraulic pump and an electric motor driving the hydraulic pump. The hydraulic pump comprises an inlet and an outlet for hydraulic fluid and an active fluid flow path arranged therebetween such that, in an active mode of operation when the pump is driven by the electric motor, hydraulic fluid is actively drawn in through the inlet and exhausted out through the outlet. The hydraulic pump further comprises a bypass flow path arranged between the pump inlet and outlet, such that, in a damping mode of operation, hydraulic fluid is able to freely flow between the inlet and outlet in either direction.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: October 2, 2018
    Assignee: GOODRICH ACTUATION SYSTEMS SAS
    Inventors: Emmanuel Lesage, Serge Grand
  • Patent number: 9821635
    Abstract: In order to perform overheating protection of a controller for water-heating heaters 3A and 3B for in-vehicle heating, an energization circuit for a heater 3 (3A, 3B) includes IGBTs 11 and 12 as switching devices that are disposed therein to be in series with the heater 3, and a first temperature sensor (first thermistor) 21 which measures temperature of these IGBTs 11, 12. A comparator 25 is provided to transmit a signal when the temperature of the IGBTs 11, 12 is equal to or greater than a predetermined temperature. Then, the IGBTs 11, 12 can be forcibly turned OFF via the IGBT driver 13 in response to a signal from the comparator 25 without a microprocessor 14 intervening therebetween.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: November 21, 2017
    Assignees: SANDEN HOLDINGS CORPORATION, HONDA MOTOR CO., LTD.
    Inventors: Shunsuke Kaneko, Kazuyasu Ushigome, Jyouji Arai, Soichi Mizuno, Mamoru Fujita, Naoki Inoue
  • Patent number: 9822773
    Abstract: Apparatus and associated methods relate to nutating a piston drive linkage oriented around a longitudinal axis in response to the rotation of a drive shaft about a drive axis, said longitudinal axis being offset and canted with respect to said drive axis. In an illustrative example, the piston drive linkage may be formed as a wobble plate extending radially from the longitudinal axis. Near a periphery, the wobble plate may attach to a plurality of stationary piston cranks. The nutating motion of the piston drive linkage may impart a substantially linear motion profile substantially parallel to the drive axis of rotation. A bearing oriented around the longitudinal axis may advantageously be freely inserted into and removed from an aperture in the wobble plate. An inner race of the bearing may freely rotate about the longitudinal axis in response to rotation about the drive axis.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: November 21, 2017
    Assignee: Nextern Inc.
    Inventors: Ryan Douglas, Casey Carlson, Dennis Berke
  • Patent number: 9261092
    Abstract: The invention relates to a pump comprising a housing (2), comprising at least one pump chamber (15), comprising an inlet valve (30) that has a valve element (30a) which controls an inlet opening (30c), comprising an outlet valve (33) that has a valve element (33a) which controls an outlet opening (33c), comprising a pressure relief valve (43) that has a valve element (43a) which controls a pressure relief opening (43c) and on which a spring element (48) acts in the closing direction (31), and comprising a spring chamber (49) that receives the spring element. A stop element (51) which can be accessed from the housing outer face and which can be adjusted in the closing direction (31) is arranged in the spring chamber (49), the spring element (48) end that faces away from the closing direction resting against the stop element.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: February 16, 2016
    Assignee: Alfmeier Präzision AG Baugruppen und Systemlösungen
    Inventors: Erich Dörfler, Ronny Gehlmann
  • Patent number: 9194381
    Abstract: A center shaft of a bent axis type axial piston pump/motor includes an outer race, which is attached to a shaft attachment hole of a cylinder block, has a shaft portion accommodation hole at one end and has a spring accommodation hole at the other end, and an inner shaft, which includes a shaft supporting spherical head portion having a large outer shape dimension at a distal end of a shaft base portion and attached to the shaft portion accommodation hole of the outer race through the shaft base portion.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: November 24, 2015
    Assignee: Komatsu Ltd.
    Inventors: Takuya Miyata, Seita Hayashi
  • Patent number: 9169817
    Abstract: A method for operating a fuel pump is provided. The method may include decreasing a pump chamber pressure, passively opening a metering valve coupled to a pump chamber in response to the decreasing, and while the metering valve is open, generating a rotational output via a motor, transferring the rotational output into an actuation force applied to the metering valve via a metering valve actuation device, and inhibiting the metering valve from closing via sustaining application of the actuation force.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: October 27, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Paul Zeng, Vince Paul Solferino, Patrick Brostrom, Kyi Shiah, Joseph F. Basmaji, Scott Lehto
  • Patent number: 9033679
    Abstract: A displacement control system (A) of a variable displacement compressor sets a target for pressure in an intake chamber or a crank chamber, on the basis of a detected evaporator-outlet air temperature and a target for evaporator-outlet air temperature. The pressure of a refrigerant in a high-pressure section is detected, and a regulating current is supplied to a solenoid (316) of a displacement control valve, on the basis of the pressure of the refrigerant in the high-pressure section and the target for pressure.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: May 19, 2015
    Assignee: SANDEN CORPORATION
    Inventors: Yukihiko Taguchi, Yoshihiro Ochiai
  • Patent number: 9010138
    Abstract: A variable displacement compressor adjusts the pressure in a control pressure chamber and controls the displacement in accordance with the adjusted pressure. Refrigerant is supplied via a supply passage, and released via a bleed passage. The compressor includes a first control valve for adjusting the cross-sectional area of the supply passage for refrigerant. The compressor further includes a second control valve that adjusts the cross-sectional area of the bleed passage in accordance with the opening/closing state of the first control valve. The second control valve adjusts the cross-sectional area of the bleed passage such that the cross-sectional area when the first control valve is in the closed state is larger than that when the first control valve is in the opened state. The back pressure chamber is located in a section of the bleed passage that is located between the second control valve and the control pressure chamber.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: April 21, 2015
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Hiroyuki Yoshida, Osamu Hiramatsu
  • Publication number: 20150050165
    Abstract: Control device for hydraulic variable displacement pumps operated in an open hydraulic circuit and adjustable in their displacement volume by means of a servo control device. The control device comprises a control piston with two control edges to which pressure can be applied by means of pressurized pressure fluid from a variable displacement pump, the control piston being mounted in a housing so that it shifts longitudinally. The housing of the control piston comprises an inlet for the connection of a high pressure line of a variable displacement pump, an outlet which can be connected to a tank and a servo connection which can be linked to a servo cylinder, whereby a link between the inlet and the servo connection can be made via a first control edge. It is possible to create a link between the servo connection and the outlet via a second control edge.
    Type: Application
    Filed: August 5, 2014
    Publication date: February 19, 2015
    Inventors: Peter Zavadinka, Stanislav Smolka, Pavol Sedo
  • Patent number: 8956127
    Abstract: A control valve includes a body having a crankcase communicating port, a discharge chamber communicating port and a suction chamber communicating port, which are arranged in this order from one end side of the body, a solenoid, provided at the other end side of the body, for driving a main valve in accordance with the amount of current supplied, a power element, provided in an inner space surrounded by the body and the solenoid, capable of exerting the drive force to resist the solenoidal force created by a displacement of a pressure-sensing member of the power element, and a shaft by which the drive force of the power element is adjustable by adjusting the fixed position of one end side of the shaft, the shaft being fixed to one end of the body and the other end of the shaft being joined with the power element.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: February 17, 2015
    Assignee: TGK Co., Ltd.
    Inventor: Hisatoshi Hirota
  • Publication number: 20140366518
    Abstract: The present disclosure relates to a hydraulic system of a construction machine. The hydraulic system of the construction machine includes: an electronic proportional pressure reducing valve configured to control a flow rate, to which a maximum pressure is input as a control current value, and which is set to a minimum flow rate; a gear pump configured to provide pilot operation oil to the EPPRV; a shuttle valve configured to compare a pressure of first pilot operation oil passing through the EPPRV and a pressure of a flow rate control signal, and output second pilot operation oil having the greater pressure; a hydraulic pump of which a swash plate angle is controlled by the second pilot operation oil; and a pump control device configured to control a pressure of the EPPRV to be decreased from a maximum pressure by a predetermined inclination when the flow rate control signal is generated.
    Type: Application
    Filed: December 24, 2012
    Publication date: December 18, 2014
    Inventor: Jai Seok Bang
  • Patent number: 8845309
    Abstract: The present invention provides a vibration reducing device for pump cover body of water shut-off diaphragm pump comprising a hood cover mount and a pump cover body with a containing pit, which orderly accommodates a plastic elastic membrane disk, an obstructing baffle and a compressed spring therein. The plastic elastic membrane disk includes a downward central flow directing buffer, which can insert into a flow directing compartment in the containing pit when the hood cover mount docks with the pump cover body. The flow directing buffer can not only absorb the direct impacting momentum of pumped high pressurized water to the surrounding internal wall of the flow directing compartment but also redirect the random impacting direction of the high pressurized water. Thus, the vibration of the pump cover body with annoying noise created by the impacting momentum of the high pressurized water is deleted.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: September 30, 2014
    Inventors: Ying Lin Cai, Chao Fou Hsu
  • Publication number: 20140248163
    Abstract: Provided is a control valve for a variable capacity compressor, the control valve including: a valve body including a crank-chamber port, a discharge port, a suction port, a control channel formed inside the control valve such that the crank-chamber port and the discharge port communicate with each other, and a first bleeding channel formed such that the crank-channel port and the suction port communicate with each other; an operating unit provided in the valve body and including a second bleeding channel communicated from a center area to a side surface of the operating unit; and a driving unit provided in the valve body and connected to the operating unit to enable the operating unit to reciprocally move according to a current applied by an external source.
    Type: Application
    Filed: May 23, 2012
    Publication date: September 4, 2014
    Applicants: DOOWON ELECTRONICS CO., LTD, DOOWON TECHNICAL COLLEGE
    Inventors: Yong Ju Lee, Geon Ho Lee
  • Patent number: 8757988
    Abstract: A capacity control valve for a variable-capacity compressor such as used in an air-conditioning system in a motor vehicle is provided, wherein foreign matter is prevented from being caught in the sliding parts and leakage on the sliding parts is prevented from occurring by configuring the capacity control valve so that there are no sliding parts between the valving element and the housing (valve body). The valve includes a bellows-type valve that includes a bellows and a fixing bracket joined in an airtight manner to an end of the bellows. The fixing bracket is fixed in an airtight manner to a valve body between a first valve chamber and a suction port.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: June 24, 2014
    Assignee: Eagle Industry Co., Ltd.
    Inventors: Kohei Fukudome, Ryosuke Cho, Masayuki Futakuchi
  • Patent number: 8734127
    Abstract: A pressure regulating restriction for allowing a cylinder bore and a valve plate discharge port to communicate with each other before the cylinder bore communicates with the valve plate discharge port, and an oil passage for allowing the valve plate discharge port and the cylinder bore to temporarily communicate with each other in a time period after the cylinder bore is freed from the communication with the valve plate suction port until the cylinder bore communicates with the pressure regulating restriction. The oil passage has length capable of transmitting high pressure in the oil passage on a side of the cylinder bore at the time of the communication and of restoring the pressure in the oil passage on the side of the cylinder bore to the pressure on a side of the valve plate discharge port before the communication with a next cylinder bore at the time of non-communication.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: May 27, 2014
    Assignee: Komatsu Ltd.
    Inventor: Takeo Iida
  • Patent number: 8727743
    Abstract: 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) are inserted opposite to each other in each cylinder (6) such that the first piston (8) slides on the first swash plate (30) and the second piston (9) slides on the second swash plate (40). By providing a servo mechanism (33) that tilts the first swash plate (30) and a tilt linking mechanism (40, 70) that tilts the second swash plate (40) in conjunction with the tilting of the first swash plate (30), tilt angles of the two swash plates (30, 40) can be controlled by the single servo mechanism (33).
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: May 20, 2014
    Assignee: Kayaba Industry Co., Ltd.
    Inventor: Takeo Shimizu
  • Patent number: 8684699
    Abstract: A pump for a high-pressure cleaning appliance for delivering cleaning liquid is provided. The pump has a pump housing with at least one pump chamber into which at least one piston plunges. The pump chamber is connected via at least one inlet valve to a suction line and via at least one outlet valve to a pressure line. A bypass line leads from the pressure line to the suction line. An overflow valve is arranged in the bypass line. The valve body of the overflow valve is connected to a control element which, in dependence upon the flow rate of the cleaning liquid, displaces the valve body to a closed or an open position. A rear housing component and a front housing component of the pump housing are joined together. The bypass line opens into a suction line section of the suction line, which extends between the housing components.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: April 1, 2014
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Robert Nathan, Juergen Erdmann
  • Patent number: 8657589
    Abstract: A hydraulic machine has at least one working chamber (11) of cyclically changing volume, and low-pressure and high pressure valves (15, 13) to control the connection of each of the at least one working chambers to low-pressure and high-pressure lines (16, 14) respectively. A method of operating the machine includes holding the low-pressure valve means (15) closed during at least an entire cycle of the chamber (11), starting at minimum chamber volume, such that gas dissolved in liquid in the chamber is released therefrom during an expansion of the chamber volume and re-dissolved during a reduction thereof.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: February 25, 2014
    Assignee: Artemis Intelligent Power Limited
    Inventors: Uwe Bernhard Pascal Stein, Niall James Caldwell, William Hugh Salvin Rampen
  • Publication number: 20130343915
    Abstract: According to one embodiment, a radial fluid device comprises a cylinder block, a first plurality of pistons, a second plurality of pistons, a first cam, a second cam, and a cam rotation device. Each of the first plurality of pistons are slidably received within a different one of a first plurality of radially extending cylinders. Each of the second plurality of pistons are slidably received within a different one of a second plurality of radially extending cylinders. The first cam is disposed about the first plurality of radially extending cylinders. The second cam is disposed about the second plurality of radially extending cylinders. The cam rotation device is coupled to the first cam and the second cam. The cam rotation device is operable to rotate the first cam in a first direction and the second cam in a second direction.
    Type: Application
    Filed: June 25, 2012
    Publication date: December 26, 2013
    Applicant: BELL HELICOPTER TEXTRON INC.
    Inventors: Carlos A. Fenny, James E. Sobel
  • Patent number: 8589026
    Abstract: An auxiliary hydraulic system for vehicles, in particular pick-up trucks, is configured to supply hydraulic fluid under pressure to both on-board and off-board auxiliary equipment such as snow plows, dump boxes and wood splitters. The auxiliary hydraulic system includes a multi-piston fluid pump with electrically selectable poppet valves and an associated microprocessor control that facilitates variable output so that a desired proportional flow can be supplied to the auxiliary equipment. The system also provides a switchable valve arrangement for directional control and an arrangement of fluid distribution pipes and detachable couplings so that a range of different auxiliary equipment can be quickly and simply connected to the system. A simple user interface is also included so that the operator can command the auxiliary equipment from either within or in close proximity to the vehicle.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: November 19, 2013
    Assignee: Multimatic Inc.
    Inventors: Laurence J Holt, Paul Lavoie
  • Patent number: 8568109
    Abstract: A pump for a high-pressure cleaning device for delivering cleaning fluid is provided. The pump has at least one pump chamber, into which at least one piston plunges, and which is connected to a suction line via at least one inlet valve and to a pressure line via at least one outlet valve. A bypass line leads from the pressure line to the suction line. An overflow valve is arranged in the bypass line. The valve body of the overflow valve is connected to a control piston which is displaceably held in a control chamber with the interposition of a sealing element and moves the valve body into a closed or an open position as a function of the flow rate of the cleaning fluid in the pressure line. A sliding element is arranged in the control chamber and abuts sealingly on the wall of the control chamber.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: October 29, 2013
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Robert Nathan, Juergen Erdmann
  • Patent number: 8500415
    Abstract: A displacement control valve for a variable displacement compressor includes a valve element. The valve element has a discharge pressure receiving surface which receives pressure in a discharge chamber and a suction pressure receiving surface which receives pressure in a suction pressure section acting in a direction opposite to the direction that the pressure in the discharge chamber acts on the discharge pressure receiving surface. The displacement control valve also includes a solenoid generating generates an electromagnetic force acting on the valve element, and a urging means urging on urges the valve element in a valve closing direction to hold the valve element in a valve closing position when the generated electromagnetic force generated by the solenoid is not acting on the valve element.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: August 6, 2013
    Assignee: Sanden Corporation
    Inventor: Yukihiko Taguchi
  • Patent number: 8459962
    Abstract: Provided is a variable displacement swash plate type compressor including a cylinder block having a plurality of cylinder bores, a drive shaft rotatably supported by the cylinder block, a lug plate fixedly installed at the drive shaft, a swash plate rotated by the lug plate to vary its inclination angle, and pistons reciprocally accommodated in the cylinder bores depending on rotation of the swash plate, the compressor including a projection projecting from the lug plate toward the swash plate and disposed only behind the rotational direction of the drive shaft, a slope formed on the rear part of the lug plate at one side of the projection, an arm projecting from the swash plate toward the lug plate, a first guide coupled to the arm in front of the rotational direction of the drive shaft to move along the slope in a contact manner, and a second guide coupled to the arm adjacent to the projection to move along the slope in a contact manner.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: June 11, 2013
    Inventors: Geon-ho Lee, Dong-hui Lee, Tae-jin Lee, Ki-beom Kim
  • Patent number: 8439653
    Abstract: A pump for a high-pressure cleaning apparatus for delivering cleaning liquid is provided. The pump has at least one pump chamber into which at least one reciprocally movable piston plunges. The pump chamber is connected via at least one inlet valve to a suction conduit and via at least one outlet valve to a pressure conduit. A bypass conduit leads from the pressure conduit to the suction conduit. A bypass valve is arranged in the bypass conduit. The valve body of the bypass valve is connected to a control member which displaces the valve body to a closed or an open position and displaces a switch plunger which is coupled to the valve body to a first or a second switch position. The valve body opens a passage upstream of the valve seat which becomes wider when the valve body is at a predetermined distance from the valve seat.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: May 14, 2013
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Robert Nathan, Juergen Erdmann, Sven Dirnberger
  • Patent number: 8439652
    Abstract: A suction throttle valve of a variable displacement compressor having a compressor housing includes a suction chamber, a crank chamber, an inlet, a suction passage, a valve body, a valve housing, an urging member, a valve chamber, and a communication hole. The valve body is provided for adjusting an opening area of the suction passage and movably arranged in the suction passage. The urging member urges the valve body in the direction that decreases the opening area of the suction passage. The communication hole is provided for connecting the suction chamber to the valve housing. An opening area of the communication hole is variable in accordance with the movement of the valve body. Accordingly, the opening area of the communication hole becomes maximum during the maximum displacement operation of the compressor and becomes reduced during the intermediate displacement operation of the compressor.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: May 14, 2013
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Shiro Hayashi, Taro Ozeki, Mitsunori Yoshida, Toshiyuki Miyano, Sokichi Hibino
  • Patent number: 8353681
    Abstract: A compressor, such as an air-conditioning compressor for motor vehicles, particularly with a drive which has an adjustable swept volume, for the intake and compression of a refrigerant and a lubricant separator, which separates lubricant from the refrigerant, in particular, in the discharge pressure region of the compressor. The lubricant is introduced to the drive by a partial flow branching off from the high pressure refrigerant flow.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: January 15, 2013
    Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KG
    Inventors: Jan Hinrichs, Thomas Di Vito
  • Patent number: 8322999
    Abstract: A hydrostatic axial piston machine, in particular a swashplate machine, has a cylinder drum (3) mounted so that it can rotate around an axis of rotation (2). The cylinder drum (3) is provided with cylinder bores (4), in each of which a piston (5) is mounted so that it can be displaced longitudinally. The cylinder drum (3) is axially supported on a control surface (8) affixed to the casing and on which an inlet connection (10) and an outlet connection (11) are realized. The cylinder bores (4) can each be placed in communication by a connecting channel (12) with the control surface (8). The connecting channel (12) is provided with a cross-section that increases from the cylinder bore (4) toward the control surface (8).
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: December 4, 2012
    Assignee: Linde Material Handling GmbH
    Inventor: Martin Bergmann
  • Publication number: 20120251343
    Abstract: [Object of the Invention] An object of the present invention is to provide a control valve that accommodates a pressure sensitive unit in a solenoid unit and is of simple structure.
    Type: Application
    Filed: December 3, 2010
    Publication date: October 4, 2012
    Applicant: Sanden Corporation
    Inventor: Yukihiko Taguchi
  • Patent number: 8251673
    Abstract: A displacement control valve of a variable displacement compressor opens and closes a communication passage extending between a portion of the compressor on which discharge pressure acts and a crank chamber of the compressor. The displacement of the compressor is controlled, such that discharge chamber pressure does not act on the valve body in the opening and closing direction, and pressures acting on the opposite ends of the valve body are maintained at the same level.
    Type: Grant
    Filed: July 2, 2007
    Date of Patent: August 28, 2012
    Assignee: Sanden Corporation
    Inventor: Yukihiko Taguchi
  • Patent number: 8246323
    Abstract: A liquid pressurization device which is housed within a single rectangular housing that utilizes a solar panel as the front cover and the only source of energy. An interchangeable pulley mounted on a motion controlled technology motor allows for a wide range of pressure and volume scenarios common to liquid pressurization applications, and in combination with a motor controller and driver board, and programmable logic control board, these pressure and volume scenarios are further optimized for the utilization of solar energy as the sole energy source. Said programmable logic board further provides ports for firmware updates, monitoring devices, and diagnostic devices. A lever is reciprocated by an energy transfer pulley that transfers drive force to the liquid end of the apparatus, providing a low friction multiplication of available power. The liquid end of the apparatus is further designed for ease of maintenance to replaceable components with limited life spans.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: August 21, 2012
    Inventor: George Patterson Bellis, Sr.
  • Patent number: 8235681
    Abstract: 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) are inserted opposite to each other in each cylinder (6) such that the first piston (8) slides on the first swash plate (30) and the second piston (9) slides on the second swash plate (40). By providing a servo mechanism (33) that tilts the first swash plate (30) and a tilt linking mechanism (40, 70) that tilts the second swash plate (40) in conjunction with the tilting of the first swash plate (30), tilt angles of the two swash plates (30, 40) can be controlled by the single servo mechanism (33).
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: August 7, 2012
    Assignee: Kayaba Industry Co., Ltd.
    Inventor: Takeo Shimizu
  • Patent number: 8231360
    Abstract: A hydrostatic pump (1) has a mechanical displacement volume control with a mechanical control element (4), which for generation of an actuator pressure that acts on a positioning piston (5) which is functionally connected with a displacement setting device (3), has a position-controlled control valve (6) functionally connected with a control lever (30) and with the displacement setting device (3) of the pump (1). A pump with a mechanical displacement volume control with a pressure limiting function can be accomplished by mechanically decoupling the control lever (30) from the displacement setting device (3) whereby a pressure cutoff function is provided, with which, by respective pilot valves (21a, 21b), a pressure signal can be generated from a delivery line (2a, 2b) of the pump (1), which signal is transmitted via the control valve (6) to the positioning piston (5) and counteracts the control pressure.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: July 31, 2012
    Assignee: Linde Material Handling GmbH
    Inventors: Martin Steigerwald, Burkhard Sturmer
  • Patent number: 8197229
    Abstract: A double-headed piston type compressor includes front and rear housings, a cylinder block defining therein a crank chamber and a plurality of cylinder bores and having a shaft hole therethrough, a double-headed piston accommodated in the cylinder bores for reciprocating therein, a rotary shaft rotatably supported by the shaft hole, compression chambers defined by the cylinder bores, a suction chamber defined by the front housing and an introduction passage having a rotary valve for introducing refrigerant from the suction chamber into the compression chambers. The introduction passage includes a communication passage formed in the cylinder block for connecting the suction chamber to the shaft hole, suction passages connecting the shaft hole and the compression chambers and a recessed passage formed in the outer circumferential surface of the rotary shaft for connecting intermittently between the communication passage and the respective suction passages in accordance with the rotation of the rotary shaft.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: June 12, 2012
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Tsubasa Mitsui, Shinichi Sato, Manabu Sugiura, Keishi Nakagaki, Akio Saiki
  • Publication number: 20120141303
    Abstract: The present invention provides a fluid system (99) comprising a source of hydraulic fluid under pressure supplying a hydraulic fluid consumer (103) together with a valve passing fluid between said source and said fluid consumer (102). A first fluid compliance (105) is situated between said source (100) and said valve (102) and a variable restrictor (110) is provided for varying the cross sectional area available for flow of fluid through said valve (102) and is movable between a first position (A) with a larger said area and a second position (B) with a smaller said area. A bias means (117) biases said restrictor (110) towards said second position whilst an opening means (Fa) urges said restrictor (110) against said bias (117) when fluid flows through said valve (102) and a damping means (126) damps movement of said restrictor between said first and second positions and provides a resistance which increases with the velocity of displacement of said restrictor (110).
    Type: Application
    Filed: August 11, 2010
    Publication date: June 7, 2012
    Inventors: Niall James Caldwell, William Hugh Salvin Rampen
  • Publication number: 20120128509
    Abstract: [Object of the Invention] An object of the present invention is to provide a reciprocating compressor comprising an aperture control valve for an inlet passage, wherein installation of the aperture control valve is easy, sufficient sectional area of the inlet passage is maintained near the outlet holes of the aperture control valve, distribution of flaw rates of refrigerant gas sucked into the cylinder bores during inlet stroke is even, and the inlet chamber operates as a muffler to make it possible to optimize the structure of the aperture control valve from the viewpoint of decreasing inlet pressure pulsation.
    Type: Application
    Filed: July 29, 2010
    Publication date: May 24, 2012
    Inventors: Yukihiko Taguchi, Hiroshi Ikeda
  • Patent number: 8182239
    Abstract: A control valve includes a diaphragm assembly imparting a biasing force to a moving member according to the pressure introduced into the pressure-sensitive part. The moving member is moved by the biasing force to control the valve opening. The control valve further includes a solenoid part which imparts the thrust of the diaphragm assembly produced according to the pressure introduced into the pressure-sensitive part to the moving member through a diaphragm holding body as a biasing force, and imparts a biasing force capable of controlling the valve opening in cooperation with the afore-said biasing force to the moving member.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: May 22, 2012
    Assignee: Eagle Industry Co., Ltd.
    Inventors: Hideki Higashidozono, Norio Uemura, Kohei Fukudome
  • Patent number: 8177522
    Abstract: A mode changing apparatus for a scroll compressor is provided that may include a low-pressure passage that communicates with a suction side formed by an orbiting motion of an orbiting scroll, an intermediate-pressure passage that communicates with an intermediate-pressure side formed by the orbiting motion of the orbiting scroll, a block assembly mounted at the fixed scroll and having a connection channel that connects the low-pressure passage and the intermediate-pressure passage, a switching device disposed at the block assembly that opens/closes the connection channel, and a pressure supply device that selectively applies, to the block assembly, a discharge gas pressure discharged from the fixed and orbiting scrolls and a suction gas pressure sucked into the fixed and orbiting scrolls, to thereby operate the switching device. With such a simplified structure, the gas compression capacity of a scroll compressor may be varied, enhancing energy efficiency of a system.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: May 15, 2012
    Assignee: LG Electronics Inc.
    Inventors: Myung-Kyun Kiem, Seon-Woong Hwang
  • Patent number: 8147214
    Abstract: Provided is a compressor having an enhanced capability of supplying oil to a thrust bearing and a radial bearing which are interposed between a center through-hole in a cylinder block and a driving shaft. To this end, the compressor 1 has an air bleed passage 31 which is configured to allow crank chamber 5 and intake chamber 7 to communicate with each other, including: a first space S1 in the center through-hole 14; a communicating part 41 for allowing the first space S1 and a second space S2 to communicate with each other; the second space S2 in the center through-hole 14; a penetrating passage 43 formed to pass through the driving shaft 10, thereby allowing the second space S2 and a third space S3 to communicate with each other; the third space S3; and a communicating passage 45 for allowing the third space S3 and an intake chamber 7 to communicate with each other.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: April 3, 2012
    Assignee: Calsonic Kansei Corporation
    Inventor: Ryuichi Hirose
  • Patent number: 8118566
    Abstract: In a piston-type compressor in which a working fluid is taken in through an intake port is first compressed with pistons and is then let out through an outlet port, an axial hole ranging along the axial direction and a radial hole communicating with the axial hole and opening into a crankcase are formed within the shaft. Additionally, a first intake passage through which the working fluid having flowed in through the intake port is guided via the crankcase to the radial hole and the axial hole and a second intake passage through which the working fluid having flowed in through the intake port is guided to join the working fluid having been drawn into the first intake passage by bypassing the crankcase are formed in the compressor. The working fluid is taken into cylinders from the area where the first working fluid and the second working fluid join each other.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: February 21, 2012
    Assignee: Valeo Thermal Systems Japan Corporation
    Inventors: Tomoyasu Takahashi, Yoshihiro Adachi
  • Patent number: 8051763
    Abstract: In a hydraulic apparatus, a first rotating member and a second rotating member are provided so as to be relatively rotatable with a same central axis, a cam is provided on the first rotating member, pistons are arranged on the second rotating member so as to be opposed to the cam, the pistons are pressed against the cam to contact by compression coil springs, oil chambers of which volumes are expanded and contracted according to movements of the pistons are provided on the second rotating member, first and second fluid paths through which oil flows into and out from the oil chambers are provided, and a path switching device for switching an inflow direction and an outflow direction of the oil in the first and second fluid paths according to difference in pressure between the first and second fluid paths is provided.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: November 8, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinya Kuwabara, Tadashi Fujiyoshi
  • Publication number: 20110229348
    Abstract: The power conversion mechanism of a variable displacement reciprocating compressor includes a joint shaft (54) that is fitted to a drive shaft (30) through a bearing (56) and supported by an inner circumferential face of a support hole (58) formed in the cylinder block (20) so as not to be relatively rotatable but to be slidable relative to the inner circumferential face; a joint case (66) that is integrally and tiltably formed in the conversion mechanism (38); and a plurality of balls (74) rollably held between JS-side protrusions that are integrally formed in the joint shaft (54) and JC-side protrusions (62) that are integrally formed in the join case (66). The variable suction throttle mechanism of the compressor uses the sliding movement of the joint shaft (54) to change air-flow resistance in a valve chamber (101) communicating with the support hole (58).
    Type: Application
    Filed: November 20, 2009
    Publication date: September 22, 2011
    Inventor: Hiroshi Honda
  • Patent number: 7918656
    Abstract: A suction throttle valve of a compressor has a compressor housing having a suction chamber and a crank chamber. The suction throttle valve includes a suction passage formed in the housing, a suction port provided at an inlet of the suction passage, a valve body movably arranged in the suction passage for adjusting opening of the suction passage, an urging member for urging the valve body toward the suction port, and a valve chamber provided in the suction passage. Refrigerant is drawn into the suction passage through the suction port and then received in the suction chamber. A first communication hole is formed through the housing, through which the valve chamber and the suction chamber are in constant communication with each other. A second communication hole is formed through the housing, through which the valve chamber and the crank chamber are in constant communication with each other.
    Type: Grant
    Filed: November 1, 2007
    Date of Patent: April 5, 2011
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Sokichi Hibino, Shiro Hayashi, Masaki Ota, Masahiro Kawaguchi
  • Patent number: 7887302
    Abstract: A variable flow pump includes: a housing with inlet and outlet chambers interconnected by a main bore and a non-rotating cylinder block positioned in the main bore. The cylinder block includes: a central bore communicating with the inlet chamber; cylinder bores arrayed around the central bore; first feed passages interconnecting the inlet chamber and the cylinder bores, defining a bypass flowpath between the cylinder bores; and at least one discharge valve disposed at the second end which permits fluid flow from the cylinder bores to the discharge chamber but prevents opposite flow; Pistons are disposed in the bores. A shaft is coupled to the pistons so as to cause them to reciprocate through an axial pump stroke when the shaft is rotated. A mechanism is coupled to the cylinder block which modulates the axial position of the cylinder block within the housing, varying the size of the bypass flowpath.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: February 15, 2011
    Assignee: General Electric Company
    Inventor: Walter Decania Hutto, Jr.
  • Patent number: 7841839
    Abstract: A variable displacement compressor includes a housing assembly. A displacement control structure for the variable displacement compressor includes a passage forming member, a flat partition and a displacement control valve. The passage forming member is connected to an exterior surface of the housing assembly for forming a refrigerant passage for allowing the refrigerant to be discharged out from the compressor to an external refrigerant circuit. The flat partition is interposed between the passage forming member and the housing assembly. A throttle penetrates through the partition, which divides the refrigerant passage into an upstream passage and a downstream passage. The displacement control valve is provided in the passage forming member. The displacement control valve senses pressure of refrigerant in the upstream passage and pressure of the refrigerant in the downstream passage to control flow rate of the refrigerant flowing through a supply passage.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: November 30, 2010
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Yoshinori Inoue, Atsuhiro Suzuki, Hiroyuki Nakaima
  • Patent number: 7765914
    Abstract: A displacer unit with a valve plate body is disclosed. The displacer unit having at least one displacer space which is arranged in a cylindrical drum rotating about an axis of rotation and which can be connected to an inlet connection and an outlet connection by a control surface. The control surface is formed on a valve plate body which is provided with a first control opening, which is connected to the inlet connection, and with a second control opening, which is connected to the outlet connection. The first control opening and the second control opening are spaced apart radially, where the displacer space can be connected to the first control opening by a first connecting passage and to the second control opening by a second connecting passage. The connecting passages are provided with a respective mechanical face seal for sealing relative to the control openings.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: August 3, 2010
    Assignee: Linde Aktiengesellschaft
    Inventors: Robert Adler, Georg Siebert