Adjustable Cam Or Linkage Patents (Class 417/218)
  • Patent number: 10859069
    Abstract: The present invention relates to a hydraulic pump system including a variable displacement pump that generates an outlet pressure. The hydraulic pump system also includes a control system that decreases a displacement volume of the variable displacement pump in response to an increase in the outlet pressure and increases a displacement volume of the variable displacement pump in response to a decrease in the outlet pressure.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: December 8, 2020
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Don Rulon Draper, Robert Leslie Isaacs
  • Patent number: 10837467
    Abstract: The present invention relates to a hydraulic apparatus, in particular to a hydraulic valve or to a hydraulic regulator, having a housing, at least one piston axially displaceably supported in a housing bore, and a respective at least one compression spring acting on the at least one piston, wherein at least one externally accessible regulating screw is adjustable within the housing bore to set the preload of the compression spring in the axial direction, wherein the adjustment distance of the at least one regulating screw is divided into at least two adjustment ranges and the torque to be applied for the adjustment of the regulating screw is larger in a second adjustment range than in a first adjustment range.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: November 17, 2020
    Assignee: LIEBHERR MACHINES BULLE SA
    Inventors: Lennard Geissler, Patrick Wohlhauser
  • Patent number: 10487858
    Abstract: Valve with in-built pressure threshold detection, mounted in an engine block pipe, the valve comprising a body comprising an electrically insulating external element (16) and an electrically conducting internal element (18) bearing the obturator seat (14), an obturator (12), the valve also comprising an electrical terminal (34) connected to a detection system which, with the engine block (4) and the internal element (18), forms an electric circuit, the internal element (18) being in permanent contact with the electrical terminal (34), the internal element (18) sliding in the external element (16) such that, for a pressure below the threshold pressure, the internal element (18) is in electrical contact with the engine block, closing the electric circuit, and for a pressure equal to or greater than the threshold pressure, the internal element (18) is not in electrical contact with the engine block, breaking the electric circuit.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: November 26, 2019
    Assignee: BONTAZ CENTRE R & D
    Inventors: Anthony Raymond Arthur Taupeau, Stéphane Pascal Perotto, Boris Marie Frédéric Goisque
  • Patent number: 10465682
    Abstract: A rotary compressor (700) and a refrigeration cycle device (1000) having same are provided. The rotary compressor comprises: a liquid reservoir (1), a first direction control assembly (49), and a compression mechanism.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: November 5, 2019
    Assignee: GUANGDONG MEIZHI COMPRESSOR CO., LTD.
    Inventors: Guoyong Yang, Weimin Xiang, Yongjun Fu
  • Patent number: 10408199
    Abstract: A hydrostatic axial piston machine includes a housing, a cylinder barrel, and a drive shaft, which are connected together and mounted in the housing so as to rotate jointly about a first axis. The machine also includes a swash plate mounted in the housing so as to pivot about a second axis to adjust a swept volume of the machine. The machine further includes a hydraulic actuating apparatus, which has an actuating piston that delimits an actuating chamber. The machine also includes a regulating valve attached to a flange face of the housing. The regulating valve has connections situated in the flange face that are used to communicate hydraulic fluid to and from the actuating chamber. The flange face is arranged obliquely so as to enclose an angle with the second axis that is greater than 0° and smaller than 90°.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: September 10, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Daniel Drixler, Erik Leipersberger
  • Patent number: 10156246
    Abstract: Exemplary control valves that may be configured as a load sense, closed-center, and/or open-center valve. The control valve may include optional individual valve force sensing to potentially allow an operator to smoothly operate devices operating on low-load work ports even when a variable displacement pump is inducing pressure to operate a device connected to a high-load work port of a separate valve or worksection in the same stack. This optional force sensing may be employed on any or all worksections associated with any valve stack, and may further be included on one or both workports for any given worksection. Each worksection may include parallel and variable paths of fluid supplied by the pump. Also, flow priority to one or more worksections or external valves in a corresponding hydraulic system is optional and can be customized using the variable flow path and a corresponding fixed restriction.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: December 18, 2018
    Assignee: Parker-Hannifin Corporation
    Inventor: Gregory T. Coolidge
  • Patent number: 10151305
    Abstract: A bent-axis machine comprises a housing having a control cover and a piston drum which is rotatably mounted in the housing on a valve plate and which has axial cylinders, each of which receives a piston. An adjustment system includes a pivot cradle via which the piston drum and the valve plate can be pivoted relative to the drive axis about a maximum working range which is delimited by a minimum pivot angle and a maximum pivot angle. The minimum pivot angle of the working range is shifted out of its zero position by at least 5°, and the maximum pivot angle is extended in the same way by at least 5° in order to retain the entire working range about the region left out of the lower region.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: December 11, 2018
    Assignee: Wacker Neuson Linz GmbH
    Inventors: Josef Erlinger, Harald Thumfart, Robert Finzel
  • Patent number: 10066555
    Abstract: A hydraulic system includes an engine; at least one hydraulic pump operatively coupled to the engine for transfer of mechanical power therebetween; and a controller operatively coupled to the engine and the at least one hydraulic pump. The controller is configured to determine a lug speed error as a difference between a target lug speed value and a speed of the engine, set at least one closed-loop gain to zero when the speed of the engine is greater than or equal to the target lug speed value, set the at least one closed-loop gain to a non-zero value when the speed of the engine is less than the target lug speed value, generate a pump control signal by scaling the lug speed error by the at least one closed-loop gain.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: September 4, 2018
    Assignee: Caterpillar Forest Products Inc.
    Inventors: Patrick Opdenbosch, Joseph R. Storey
  • Patent number: 10046351
    Abstract: A pump system for pumping a fluid includes a motor housing, a motor, a rod, a positive displacement pump, a position sensor, and a controller. The motor is located within the motor housing. The rod is connected to and driven by the motor and the positive displacement pump for moving a fluid is driven by the rod. The position sensor produces a rod position signal that is a function of a position of the rod, and the controller produces a drive signal for driving the motor as a function of the rod position signal.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: August 14, 2018
    Assignee: Graco Minnesota Inc.
    Inventors: Mark J. Brudevold, Benjamin R. Godding, Joseph E. Tix, Daniel P. Ross
  • Patent number: 10006457
    Abstract: A variable displacement pump includes: an urging mechanism which includes two spring members; an electromagnetic switching valve which is arranged to connect the second control chamber and the discharge portion in an energized state, and to connect the second control chamber and the low pressure chamber in a deenergized state; and a control valve which is actuated by the pressure of the discharge portion, and which is arranged to decrease the pressure within the second control chamber when the pressure of the discharge portion becomes equal to or greater than a predetermined pressure.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: June 26, 2018
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yasushi Watanabe, Atsushi Naganuma
  • Patent number: 9945360
    Abstract: To provide a radial piston pump capable of displacement control without using an electronic control valve.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: April 17, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Mukai, Norihito Kobata
  • Patent number: 9926924
    Abstract: System for managing a vehicle compressor, wherein the compressor (C) is driven in rotation by a vehicle engine (E). The system varies a stop pressure threshold (cut-off threshold) of the compressor as an inverse function of a compressor speed of rotation. The compressor speed of rotation is directly proportional to the vehicle engine speed of rotation (E).
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: March 27, 2018
    Assignee: Iveco S.p.A.
    Inventors: Massimo Bezze, Claudio Prina
  • Patent number: 9897183
    Abstract: A hydrostatic variator having a common yoke design and two or more bent axis piston drive units is disclosed in which the rotating group of a drive unit is arranged to be movable relative to the yoke to alter the angle between its drive shaft axis and rotating group axis independent of the other drive unit. This can be accomplished using movable sector plates coupled to the rotating groups that are arcuately movable within the yoke about the axis perpendicular to the respective drive shaft axes of the drive units. Such variators enjoy the response and packaging advantages of a common yoke design while still allowing dynamic adjustment of system size. In turn, varying system size allows for efficiency to be improved at conditions other than at the maximum design torque.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: February 20, 2018
    Assignees: Parker-Hannifin Corporation, Kinetics Drive Solutions Inc.
    Inventors: John Czepak, Gerald Dyck, Per-Ola Vallebrant
  • Patent number: 9869311
    Abstract: A system for determining an estimated displacement of a variable displacement hydraulic pump includes a control cylinder associated with the swash plate of the variable displacement hydraulic pump to control the angle of inclination of the swash plate and a valve that controls the flow of hydraulic fluid to the control cylinder and has a position that defines an effective area of an opening of the valve. A pressure sensor generates pressure signals indicative of an output pressure from the variable displacement hydraulic pump. A controller is configured to receive pressure signals from the pressure sensor and determine an estimated displacement of the variable displacement hydraulic pump based upon the pressure signals from the pressure sensor and the position of the valve.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: January 16, 2018
    Assignee: Caterpillar Inc.
    Inventors: Hongliu Du, Ronald D. Shinogle
  • Patent number: 9863532
    Abstract: A hydrostatic variable displacement pump (2) has a displacement volume set by an electro-hydraulic control device (10) provided with a safety function. In a fault scenario, the variable displacement pump (2) is set to a neutral position. The electro-hydraulic control device (10) has a single electro-hydraulic setpoint encoder (30) to specify the setpoint of the displacement volume of the variable displacement pump (2) and an electrically actuatable valve device (35) connected in series downstream of the setpoint encoder (30), by which the direction of displacement of the variable displacement pump (2) is controlled and which is provided with the safety function.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: January 9, 2018
    Assignee: Linde Hydraulics GmbH & Co. KG
    Inventors: Rolf Lasaar, Markus Jung
  • Patent number: 9765778
    Abstract: A rotary positive displacement pump for fluids, in particular for the lubrication oil of a motor vehicle engine (60), has a displacement that can be regulated by means of the rotation of a stator ring (12) having an eccentric cavity (13) in which the rotor (15) of the pump (1) rotates. The stator ring (12) is configured as a multistage rotary piston for displacement regulation and is arranged to be directly driven by a fluid under pressure, in particular oil taken from a delivery side (19) of the pump or from a point of the lubrication circuit located downstream the oil filter (62). The invention also concerns a method of regulating the displacement of the pump (1) and a lubrication system for a motor vehicle engine in which the pump (1) is used.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: September 19, 2017
    Assignee: VHIT S.P.A.
    Inventors: Leonardo Cadeddu, Matteo Cortesi
  • Patent number: 9582008
    Abstract: Fluid pump pressure regulation systems and methods have a valve body with a bore and a valve spool. The valve spool connects a first and second port to a third port in different valve spool positions. The first port is in fluid communication with an output of a fluid pump to receive a first fluid pressure from the fluid pump. The second port is in fluid communication with a fluid reservoir. The third port is in fluid communication with a fluid pump input to provide a second fluid pressure to the fluid pump to control the first fluid pressure from the fluid pump. A linear actuator is adjacent the valve body, with a first spring and a second spring biasing the valve spool in a first or second direction.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: February 28, 2017
    Assignee: HUSCO Automotive Holdings LLC
    Inventor: Curt Van Weelden
  • Patent number: 9581239
    Abstract: A variable capacity type oil pump, which is driven by an engine, supplies hydraulic pressure to a hydraulic control circuit of an automatic transmission. A range switch mechanism, which includes a motor as a motive power source, switches a shift range of the automatic transmission. Further, a switch operation mechanism, which switches a discharge amount of the oil pump, is driven by the motor of the range switch mechanism. In this case, an operative position of the switch operation mechanism is switched by the motor according to an input rotation speed of the oil pump, thereby switching the discharge amount of the oil pump. Accordingly, the motor of the range switch mechanism is used to drive the switch operation mechanism to switch the discharge amount of the oil pump, and thus a motive power source dedicated to changing the discharge amount of the oil pump is not needed.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: February 28, 2017
    Assignee: DENSO CORPORATION
    Inventor: Fuminori Suzuki
  • Patent number: 9551132
    Abstract: The present disclosure relates to an automatic transmission control unit for construction machinery and a control method therefor, and when a load pressure detecting unit detecting a load pressure of hydraulic pressure supplied from a main hydraulic pump to an actuator, such as a cylinder and a hydraulic motor, is in an abnormal state, the automatic transmission control unit receives an electronic control pressure signal having little concerns of a breakdown or a malfunction, and automatically changes a travel speed of construction machinery based on the received electronic control pressure signal.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: January 24, 2017
    Assignee: Doosan Infracore Co., Ltd.
    Inventor: Hyun Sik Lim
  • Patent number: 9422948
    Abstract: There is provided an energy storage system. The system includes a storage tank, a reservoir connected to the storage tank configured to store fluid and exchange the stored fluid with the storage tank, at least one path configured to transfer the stored fluid between the storage tank and the reservoir, a pump configured to inject the stored fluid into the storage tank and compress air in the storage tank, and a generator configured to generate electricity by using the injected fluid transferred from the storage tank to the reservoir.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: August 23, 2016
    Assignee: Hanwha Techwin Co., Ltd.
    Inventors: Myeong-hyo Kim, Jong-sub Shin, Young-Chang Shon
  • Patent number: 9399985
    Abstract: A hydraulic valve arrangement, in particular a control valve arrangement, of a hydraulic machine, in particular a hydraulic pump, includes at least one valve with a valve body penetrated by a pressure medium passage. The pressure medium passage has a minimum cross section that gives rise, in normal operation, to a control pressure downstream of the minimum cross section in accordance with a pressure acting at a pressure port of the valve. The minimum cross section is arranged close to a pressure medium passage mouth which is arranged upstream or is configured to be subjected to the high pressure. A hydraulic machine arrangement, in particular a pump arrangement, includes the hydraulic valve arrangement.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: July 26, 2016
    Assignee: Robert Bosch GmbH
    Inventors: Martin Sewcz, Friedemann Nordt, Carola Diebold
  • Patent number: 9234464
    Abstract: A fuel metering system for supplying fuel to load includes a variable displacement piston pump having an adjustable hanger that is movable to a plurality of positions. The variable displacement piston pump is configured to receive a drive torque and, upon receipt of the drive torque, to supply fuel to the plurality of loads at a flow rate dependent on the position of the adjustable hanger. A hanger actuator is coupled to receive hanger position commands and is operable, in response thereto, to move the adjustable hanger to the commanded position.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: January 12, 2016
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventor: Dwayne Michael Benson
  • Patent number: 9151280
    Abstract: The present disclosure sets forth an axial piston pump barrel. The axial piston pump barrel is provided with cylinders, antechambers, and fluid flow apertures which are uniquely shaped and dimensioned so as to increase the overall flowability and expulsion rate of a piston pump. By providing curvilinear transition zones and fluid flow apertures, the cylinders can be completely filled and pressurized even at the extremely high pressures and RPMs required by modem machines. Such machines may include front-end loaders, excavators, pipe layers, graders, and the like wherein such pumps can be used to power hydraulic cylinders moving the implements, work arms and other tools associated with such machines.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: October 6, 2015
    Assignee: Caterpillar Inc.
    Inventors: Wayne Fritz, Jeremiah C. Johnson
  • Patent number: 9145660
    Abstract: A hydraulic control system for a machine is disclosed. The hydraulic control system may have a tank, a pump configured to draw fluid from the tank and pressurize the fluid, an actuator, and a control valve configured to direct fluid from the pump to the actuator and from the actuator to the tank to move the actuator. The hydraulic system may also have a main relief valve movable away from a closed position to pass pressurized fluid to the tank when a pressure of the fluid directed to the actuator exceeds a first threshold pressure, and a controller in communication with the pump. The controller may be configured to selectively reduce a displacement of the pump after the main relief valve has moved away from the closed position when the pressure of the fluid directed to the actuator exceeds a second threshold pressure.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: September 29, 2015
    Assignee: Caterpillar Inc.
    Inventors: Randal N. Peterson, Aleksandar M. Egelja, Rustu Cesur
  • Patent number: 9063545
    Abstract: A pressure-regulating arrangement includes a main line through which a flow can pass from an intake to an output and in which an adjustable nozzle is arranged. The pressure-regulating arrangement further includes a pressure-regulating valve having a pressure connection which is connected to the main line downstream of the nozzle. A valve body of the pressure-regulating valve is movable from a basic position in an opening direction to increase an outlet pressure of an outlet connection. A first pressure which is tapped off from the main line upstream of the nozzle acts in the opening direction. The outlet pressure and a second pressure, which is tapped off from the main line downstream of the nozzle, act in a closing direction, which is opposed to the opening direction, in order to reduce the outlet pressure.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: June 23, 2015
    Assignee: Robert Bosch GmbH
    Inventor: Horst Stegmaier
  • Patent number: 9028228
    Abstract: A pump may include a rotatable pumping part, a drive shaft, and a coupling for transmitting rotational movement of the drive shaft to the pumping part. The coupling may include a first part which is connected to the pumping part and a second part which is connected to the drive shaft, the first part having an electrically conductive material and the second part having an element for generating a magnetic field. The second part may be moveable relative to the first part to vary the degree of interaction between a magnetic field generated by the element and the electrically conductive material. Movement of the second part relative to the first part may be caused, at least in part, by a fluid controlled actuator having a piston moveable within a cylinder which is substantially non-rotating, such that the drive shaft and the second part are rotatable relative to the cylinder.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: May 12, 2015
    Assignee: Concentric Birmingham Limited
    Inventors: Paul David Shepherd, Magnus Cooper
  • Publication number: 20150118073
    Abstract: A variable displacement compressor having means for regulating the minimum inclination angle of a swash plate, a spring urging the swash plate in the inclination angle-increasing direction, and a spring urging the swash plate in the inclination angle-decreasing direction. The swash plate inclination angle is ?a as the sum of the urging forces of both springs is zero, when the drive shaft is not rotated; and, when the drive shaft is rotated, its inclination angle is ?b at which the sum of moments MS, MF is zero. Moment MS of rotational motion is based on selling the product of inertia in the variable-angle direction of the swash plate to decrease the inclination angle of the swash plate from ?a. Moment MF is based on the combined urging force of both springs set so that the inclination angle ?b is positioned at a minimum angle at maximum rotational speed.
    Type: Application
    Filed: April 24, 2013
    Publication date: April 30, 2015
    Inventors: Satoshi Terauchi, Yukihiko Taguchi
  • Patent number: 9011108
    Abstract: The invention relates to an intelligent online closed-loop balance adjusting system for a pumping unit. The system comprises a connecting rod, balance weights, a transmission device, a balance weight displacement adjusting motor and a control device used for driving the motor to adjust and control the weight displacement. The transmission device and the balance weight displacement adjusting motor are arranged above a walking beam. The balance weight displacement adjusting motor is connected with one end of the connecting rod through the transmission device, and the other end of the connecting rod is connected with balance weights. One end of the walking beam away from the horse-head is connected with the middle part of the connecting rod. The invention can realize automatic weight adjustment without shutting the machine down, and the balance weights can be adjusted with the precision of ±10%.
    Type: Grant
    Filed: December 31, 2010
    Date of Patent: April 21, 2015
    Assignee: Bode Energy Equipment Co., Ltd
    Inventors: Min Zhao, Lianxian Xing
  • Patent number: 8826646
    Abstract: A fluid delivery device, in particular for delivering exhaust gas posttreatment media, such as a urea-water solution, for an internal combustion engine, includes a movable work wall, in particular a work diaphragm. A work chamber is provided for a fluid that is to be delivered via at least one fluid connection. The work chamber is capable of being increased and decreased in size by means of the movable work wall, the at least one fluid connection, and at least one mechanism for moving the work wall upon an intake stroke and a compression stroke. The at least one mechanism is embodied such that the force for moving the work wall both in the intake stroke and in the compression stroke includes a Lorentz force.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: September 9, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Christoph Waletzek, Peter Holek, Ralph Schmidt
  • Publication number: 20140234129
    Abstract: A variable capacity compressor including swash plate connected to rotor via link mechanism can calculate a moment of rotational motion acting on swash plate and set the total moment of rotational motion in inclination angle increasing direction acting on swash plate at minimum inclination angle to a small value. The shape or the like of swash plate 111 or the like are set so that moment MRX+MS becomes a moment which orients swash plate in inclination angle increasing direction in a range from ?min (0°) to ?b and becomes a moment which orients swash plate in inclination angle decreasing direction in a range from an inclination angle exceeding ?b to ?max. The moment acting in inclination angle increasing direction of swash plate by setting the shape or the like of link arm 121 or the like is determined by calculating the sum of moment components.
    Type: Application
    Filed: August 14, 2012
    Publication date: August 21, 2014
    Inventors: Satoshi Terauchi, Yukihiko Taguchi
  • Publication number: 20140227113
    Abstract: The present invention relates to a double hydraulic machine (100) comprising two elementary machines (M1, M2) each having two orifices, the double hydraulic machine (100) comprising a distribution valve (7) suitable for, in a first configuration (C1), feeding both elementary machines (M1, M2) in parallel, and in a second configuration (C2), producing a short circuit of one of the elementary machines (M2). The invention also relates to a system for driving a vehicle comprising such a hydraulic machine (100) for driving the vehicle into motion.
    Type: Application
    Filed: February 11, 2014
    Publication date: August 14, 2014
    Applicant: POCLAIN HYDRAULICS INDUSTRIE
    Inventors: Pierre-Louis Houillon, Gilles Lemaire
  • Patent number: 8690557
    Abstract: A variable displacement vane pump includes: a plate side high pressure introduction groove formed in the pressure plate or in the cam ring, formed so that an entire is positioned within a radial width of the cam ring, and a part is positioned in a circumferential region between the suction port and the discharge port, and arranged to receive a hydraulic pressure larger than a suction pressure; and a housing side high pressure introduction groove formed in the second housing or in the cam ring, formed so that an entire is positioned within the radial width of the cam ring, that a radial center is positioned radially outside the radial center of the plate side high pressure introduction groove, and that a part is overlapped with the plate side high pressure introduction groove in the circumferential direction, and arranged to receive the hydraulic pressure larger than the suction pressure.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: April 8, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventor: Makoto Tada
  • Publication number: 20140072456
    Abstract: A variable displacement pump includes: an urging mechanism which includes two spring members; an electromagnetic switching valve which is arranged to connect the second control chamber and the discharge portion in an energized state, and to connect the second control chamber and the low pressure chamber in a deenergized state; and a control valve which is actuated by the pressure of the discharge portion, and which is arranged to decrease the pressure within the second control chamber when the pressure of the discharge portion becomes equal to or greater than a predetermined pressure.
    Type: Application
    Filed: August 23, 2013
    Publication date: March 13, 2014
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yasushi Watanabe, Atsushi Naganuma
  • Patent number: 8668466
    Abstract: A variable displacement reciprocating pump with pumping rate that is adjustable from zero to maximum stroke while the pump is running. Stroke is varied by changing relative position of pairs of eccentric inner and outer cams that drive the pump's plungers. The pump's input drive shaft drives two gear trains: a first gear train that turns the inner cams and a second gear train that turns the outer cams. These cams normally revolve together with no relative motion occurring between them. A rotary actuator is positioned in the first gear train to rotate the inner cams relative to the outer cams and thereby changes the pump's stroke. A computerized system of sensors and control valves allows the pump to be automatically controlled or limited to any one or combination of desired output flow, pressure and horsepower.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: March 11, 2014
    Assignee: Serva Corporation
    Inventor: Thomas E. Allen
  • Patent number: 8523536
    Abstract: An axial piston pump has: a cylinder body that forms therein a cylinder chamber extending in an axial direction of a drive shaft and rotates integrally with a driven shaft; a piston that reciprocates in the axial direction of the drive shaft; and a cam device that rotates integrally with the drive shaft and has: a fixed cam member that has a cam surface capable of coming into contact with a cam follower coupled to the piston and is capable of rotating integrally with the drive shaft, with movement of the fixed cam member in the axial direction being restricted; and a movable cam member that has a cam surface capable of coming into contact with the cam follower and is capable of rotating integrally with the drive shaft, with movement of the movable cam member in the axial direction being allowed, irregularity differences in the axial direction of the cam surface of the fixed cam member and the movable cam member being different from each other.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: September 3, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinya Kuwabara, Tadashi Fujiyoshi, Hiroyuki Shiori
  • Patent number: 8511216
    Abstract: A hydraulic actuator unit includes a first electric motor assembly formed by mounting one of a pair of electric motors to one of a pair of electric motor covers, wherein the first electric motor assembly is detachably mounted to a pump case so as to rotate a first control shaft around its axis line, and a second electric motor assembly formed by mounting the other one of the pair of electric motors to the other one of the pair of electric motor covers, wherein the second electric motor assembly is detachably mounted to the pump case so as to rotate a second control shaft around its axis line.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: August 20, 2013
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Kengo Sasahara, Toshifumi Yasuda, Minoru Kamada, Masaaki Inoue, Takashi Nishizawa, Fumitoshi Ishino, Masaya Itou, Shinichi Hirose, Jun Matsuura, Ryota Iwaibara
  • Publication number: 20130209284
    Abstract: A hydraulic dual axial piston machine includes a first driving unit and a second driving unit arranged one behind the other in the direction of the axis of a drive shaft and oriented opposite each other. The first and second driving units each have a respective swashplate and single actuating piston. The first and second actuating pistons exert load on a pivot cradle in a functionally identical manner to increase or decrease a pivot angle of the respective swashplate. The first and second actuating pistons are spaced apart from a central plane of the swashplates which extends through the axis of the drive shaft such that dimensions of a housing in the direction of the pivot axes of the swashplates are minimally influenced.
    Type: Application
    Filed: June 24, 2011
    Publication date: August 15, 2013
    Applicant: ROBERT BOSCH GMBH
    Inventor: Herbert Dreher
  • Publication number: 20130164446
    Abstract: A system for spray delivery of liquids comprising a motor axially coupled to one or more pistons through a wobble plate coupling. Each piston feeds an input port of a swirl chamber spray nozzle. Each piston may separately pulse the swirl chamber using a different injection point. In one embodiment, the spray nozzle, swirl chamber, feed channels and cylinder heads for the cylinders may be formed as a single integrated casting. In one embodiment, the sprayer may include an intermediate plate rotatably mounted on the wobble plate. The sprayer may include a piston cap with a flat contact with the wobble plate/intermediate plate and a spherical interface with the piston. In a further embodiment, the system may be configured for handheld application of liquids and may comprise a tank for holding the liquid, a power source and control actuator together with the spray pump and nozzle in a hand operable package.
    Type: Application
    Filed: May 29, 2012
    Publication date: June 27, 2013
    Inventor: Michael R. Harwood
  • Publication number: 20130149171
    Abstract: A fluid-working machine for a renewable energy generation device, the fluid-working machine comprising a ring cam and a plurality of working chambers, the ring cam having an annular working surface extending around an axis of rotation of the ring cam, the annular working surface defining a plurality of waves, each working chamber having a piston, each piston in operative engagement with the ring cam working surface, the ring cam and working chambers being mounted to rotate relative to each other, cycles of working chamber volume being thereby coupled to rotation of the ring cam relative to the working chambers, characterised in that the individual waves of the ring cam working surface have an asymmetric profile.
    Type: Application
    Filed: August 17, 2010
    Publication date: June 13, 2013
    Applicant: Artemis Intelligent Power Limited
    Inventors: Niall James Caldwell, Daniil Sergeevich, William Hugh Salvin Rampen, Alasdair Ian Fletcher Robertson, Uwe Bernhard Pascal Stein, Robert George Fox
  • Publication number: 20120301327
    Abstract: A pump device is operated according to a method for varying the duration of a supply stroke of a pump element, the supply stroke of which is actuated by a rotatably driven pump shaft (P) over a predetermined rotational position range of the pump shaft. In the method, the pump shaft (P) is rotatably driven by a drive shaft (A) and the angular speed of the pump shaft, at a constant angular speed of the drive shaft, is increased and decreased at least once during one revolution of the pump shaft.
    Type: Application
    Filed: January 21, 2011
    Publication date: November 29, 2012
    Applicant: META MOTOREN- UND ENERGIE-TECHNIK GMBH
    Inventor: Peter Kreuter
  • Patent number: 8287251
    Abstract: A hand operated hydraulic pump has a cam that is pivoted by a compensation cylinder that rotates the cam so as to move the pivot of an operating handle closer to the pump plunger as the output pressure of the pump increases.
    Type: Grant
    Filed: February 18, 2008
    Date of Patent: October 16, 2012
    Assignee: Actuant Corporation
    Inventor: Fredericus Johannes Weber
  • Patent number: 8277196
    Abstract: A pumping apparatus for use with a pump set to deliver fluid through the pump set includes a housing capable of receiving at least a portion of the pump set. A pumping device is moveably mounted in the housing and includes a motor that turns independently from movement of the pumping device when activated. The pumping device contacting the pump set when the pump set is received by the housing so the pumping device acts on the pump set to produce fluid flow in the pump set upon activation of the motor.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: October 2, 2012
    Assignee: Tyco Healthcare Group LP
    Inventors: Thomas G. Lewis, Jeffrey E. Price
  • Patent number: 8272847
    Abstract: The present invention relates to a reciprocating compressor. The reciprocating compressor includes a latching unit by which a piston is reciprocated by two times a total eccentric amount obtained by adding an eccentric amount of an eccentric portion to an eccentric amount of an eccentric sleeve in a power mode, while the piston is reciprocated by two times the eccentric amount of the eccentric portion in a saving mode, accordingly the piston can have an upper dead point same in the power mode and the saving mode, thereby reducing a dead volume between the piston and a discharge valve and increasing a variable ratio of a cooling capacity of the compressor in the saving mode.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: September 25, 2012
    Assignee: LG Electronics Inc.
    Inventors: Yun-Hi Lee, Sang-Joon Eum, Seoung-Min Kang, Yoon-Sung Choi, Bum-Dong Sa
  • Publication number: 20120177505
    Abstract: Control structure controls movement of a high pressure fuel pump piston of a fuel system. The piston is constructed and arranged to be inserted into or withdrawn from a pumping chamber to control a flow of fuel from the pumping chamber. The control structure includes a rocker arm with an associated roller follower. The roller follower is constructed and arranged to engage a camshaft of an engine. The rocker arm is operatively associated with the piston such that movement of the camshaft causes movement of the rocker arm and thus movement of the piston. The control structure also includes actuator structure associated with the rocker arm and constructed and arranged to vary a percentage of camshaft motion imparted to the piston via the rocker arm.
    Type: Application
    Filed: January 6, 2011
    Publication date: July 12, 2012
    Applicant: CONTINENTAL AUTOMOTIVE SYSTEMS US, INC.
    Inventor: Keith K. Gerlach
  • Publication number: 20120063925
    Abstract: A fluid metering pump is provided having reciprocating pumps including a first fluid displacer and a second reciprocating pump include a second fluid displacer. A transmission and stroke adjuster assembly for couples a prime mover to each of said first and said second fluid displacers and converting a rotary movement of the prime mover into a reciprocating stroke movement of said first and said second fluid displacers resulting in a continuous fluid flow free of fluid pulsing.
    Type: Application
    Filed: September 12, 2011
    Publication date: March 15, 2012
    Inventor: Dennis Parker
  • Patent number: 8123492
    Abstract: A pump system includes a fixed or variable capacity pump and a speed-related control mechanism to alter the capacity of a variable capacity pump or to alter the relief pressure of a fixed capacity pump in response to changes in the operating speed of the pump. A pressure generator comprising a volume of working fluid is rotated at a speed related to the operating speed of the pump and creates a forced vortex in the working fluid. The pressure induced in the working fluid of the forced vortex is used as a speed related control to alter the discharge pressure of the pump as desired.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: February 28, 2012
    Assignee: Magna Powertrain Inc.
    Inventor: Matthew Williamson
  • Publication number: 20110283878
    Abstract: A rotary pump is provided having a chamber arranged in a body and a displacement member disposed in the chamber for reciprocating therein. A drive member is used to move the displacement member within the chamber in response to relative rotation between the body and the drive member. A radial valve arrangement may be used to time when the chamber is in fluid communication with inlet and outlet ports on the pump.
    Type: Application
    Filed: October 28, 2005
    Publication date: November 24, 2011
    Applicant: NORDSON CORPORATION
    Inventor: Mario Romanin
  • Patent number: 7988432
    Abstract: A rotary compressor has two compression capacities according to two different rotational directions of the driving shaft. The rotary compressor includes a driving shaft with an eccentric portion. A roller rotates on the shaft along an inner circumference of the cylinder. A vane installed in the cylinder continuously contacts the roller. An upper and a lower bearing are respectively disposed on the top and bottom of the cylinder. A disc shaped valve rotates between two positions and has at least one suction port for selectively supplying refrigerant inside the compression chamber according to the rotational direction of the driving shaft and at least one discharge port communicates with the compression chamber for discharging the compressed refrigerant. The refrigerant is supplied through a communication hole to a port formed on the outer valve.
    Type: Grant
    Filed: April 26, 2004
    Date of Patent: August 2, 2011
    Assignee: LG Electronics Inc.
    Inventors: Ji Young Bae, Chul Gi Roh, Kyoung Jun Park, Chang Yong Jang, Jong Bong Kim
  • Patent number: 7944075
    Abstract: An energy storage system, and related method, comprises a plurality of wind turbines, each with a vertical shaft that passes through a support platform. One or more braces may be affixed to each vertical shaft at one end of this platform, at an angle of less than 60 degrees, preferably about 45 degrees. At least one heavily weighted device is configured and disposed to be raised with rotation of the wind turbine about its vertical shaft. The subsequent lowering of that weighted device generates electrical energies for immediate use. Alternatively, the weighted device may be suspended for storage of energy and subsequent use. Preferred embodiments include at least one energy storage system for holding excess unused energy. Representative devices include a weighted cylinder on a shaft or cable, and one or more railcars on a series of inclined tracks.
    Type: Grant
    Filed: November 5, 2008
    Date of Patent: May 17, 2011
    Inventor: Daniel Boone
  • Patent number: 7887308
    Abstract: A volumetric pump (1) comprising a piston (2) and a cylindrical chamber (3), contains an inlet port (10) and an outlet port (11). The piston (2) is actuated by a rotor (5) bearing an eccentric shaft (6). The shaft (6), being connected to the piston (2), causes the piston to slide back and forth inside the cylinder chamber (3) while having a bidirectional angular movement. The instroke of the piston (2) sucks a fluid (15) from the inlet port (10) through a first channel (12) into the pump chamber (3), the fluid being propelled through a second channel (13) to the outlet port (11) during the outstroke of the piston (2). The inlet (10) and outlet port (11) are opened and closed alternatively by the bidirectional angular movement of the piston (2) which acts as a valve for the inlet and outlet ports (10, 11).
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: February 15, 2011
    Assignee: Swissinnov Product sarl
    Inventor: Thierry Navarro