Having Plural Energy Input Means, Pumps Or Diverse Pump Outlets Patents (Class 60/486)
  • Patent number: 10935117
    Abstract: A hydrostatic transmission assembly includes a first housing member and a housing cap sealed to the first housing member to form a sump wherein a pump and motor are rotatably disposed. A pump mount is located in the sump and engaged to the housing cap. The housing cap also includes a motor mount for an axial piston motor, and hydraulic fluid passages for connecting the pump to the motor. A pocket is located in the housing cap to rotationally support a swash plate for the pump.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: March 2, 2021
    Assignee: Hydro-Gear Limited Partnership
    Inventor: Michael L. Bennett
  • Patent number: 10673266
    Abstract: An electric vehicle supply equipment includes multiple first power modules and a control circuit. The first power modules are electrically coupled in series at output and configured to provide a charging current and a charging voltage to charge an electric vehicle. The control circuit is configured to control one of the first power modules to be operated in a constant current mode to output the charging current, and configured to control the rest of first power modules to be operated in a constant voltage mode respectively to have at least one output voltage for generation of the charging voltage.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: June 2, 2020
    Assignee: DELTA ELECTRONICS, INC.
    Inventor: Tsung-Yuan Wu
  • Patent number: 10394215
    Abstract: The invention relates to a control method for a quick change device of a work tool, comprising the steps of: receiving a command to disengage a work tool clamping device; determining whether the work tool clamping device is in an engaged state; detecting functionality of a disengagement alarm if the work tool is in the engaged state; switching to an emergency state upon the detection of failure of the disengagement alarm. The present invention further relates to a corresponding control apparatus and work machine.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: August 27, 2019
    Assignee: Caterpillar Inc.
    Inventors: Liang Li, Mingsheng Xiao, Zhen Li, Thuong Le
  • Patent number: 10392779
    Abstract: In a method of controlling a main control valve of an excavator, when speeds of a boom cylinder and an arm cylinder is increased by handling a boom joystick and an arm joystick, a second arm control spool between a first hydraulic pump and the arm cylinder may be closed. A first boom control spool between the first hydraulic pump and the boom cylinder may be opened to supply a first flux generated from the first hydraulic pump to the boom cylinder. A second boom control spool between a second hydraulic pump and the boom cylinder may be closed. A first arm control spool between the second hydraulic pump and the arm cylinder may be opened to supply a second flux generated from the second hydraulic pump to the arm cylinder.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: August 27, 2019
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Ki-Yong Kim, Hyeon-Sik Ahn, Woo-Yong Jung, Chang-Mook Kim
  • Patent number: 9726276
    Abstract: A mixer drum driving apparatus includes an auxiliary fluid pressure pump that is provided independently of a fluid pressure pump and is capable of supplying a working fluid to a fluid pressure motor so as to cause a mixer drum to perform agitation rotation, a plurality of motors configured to drive the auxiliary fluid pressure pump to rotate, and a control unit that controls rotation of the mixer drum. When an engine is stopped during the agitation rotation of the mixer drum, the control unit drives the auxiliary fluid pressure pump to rotate by operating the plurality of motors selectively in accordance with a load of the mixer drum.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: August 8, 2017
    Assignee: KYB Corporation
    Inventor: Yoshimitsu Takahashi
  • Patent number: 9574328
    Abstract: In a lowering operation of a boom, the amount of operation of a control lever is detected by a pressure sensor and input to a controller. Based on the input operation amount, the controller obtains a target flow rate Q0 of return oil discharged from a boom cylinder, calculates a deviation ?Q between the target flow rate Q0 and an actual flow rate Q obtained from an actual rotation speed N of an electric motor acquired by a rotation speed sensor, calculates a signal Sm for controlling the opening area of a proportional solenoid valve in a manner allowing hydraulic fluid to flow to a control valve in just as much as ?Q, and controls an operation pilot pressure of the control valve supplied from a sub-pump in accordance with the signal Sm so that the hydraulic fluid will flow to the control valve exactly in the amount of ?Q.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: February 21, 2017
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventor: Seiji Hijikata
  • Patent number: 9221336
    Abstract: A power distribution assembly integrated into the lower engine housing of an internal combustion engine, the assembly having a drive train with a T-box output configuration and power take off driven by the crankshaft of the engine. The drive train may power the input shafts of a pair of independent, variable drive transmissions. In one embodiment, a single actuator engages a manual clutch/brake mechanism that controls the output shaft of the power take off. In other embodiments, an electric clutch affords control of the power take off mechanism. In further embodiments, a hydraulic clutch/brake assembly allows control of the power take off, and an additional hydraulic clutch assembly may be used to control the outputs of the T-box.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: December 29, 2015
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Nathan W. Bonny, Raymond Hauser, Scott W. Keller
  • Patent number: 9188114
    Abstract: In open-circuit hydraulic systems (1), the cross-sections of the supply lines (6) and input valves of the hydraulic pump (3) have to be large, so that sufficient flow flux can be provided. This hinders a reduction of the size of the pump and the whole hydraulic system. It is suggested that the supply flow (7) of a hydraulic pump (3) is charged by a second, charging pump (2), to a mid-pressure level (7). The cross-sections of the supply flow areas can thus be decreased.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: November 17, 2015
    Assignee: Danfoss Power Solutions ApS
    Inventors: Onno Kuttler, Luke Wadsley, Michael D. Gandrud, Pierre Joly
  • Patent number: 9181677
    Abstract: A construction machine includes a hydraulic actuator circuit including: a first circuit connected to one of travel motors and a boom cylinder; a second circuit connected to the other travel motor and arm cylinder; and a third circuit connected to a slewing motor; control valves for hydraulic actuators; and a merging valve having a first position for unloading hydraulic fluid discharged from a third pump upon no operation except for two travel motors; a second position for merging the hydraulic fluid into the first and second circuits upon a simultaneous operation of the travel motors and an operation of at least one remaining hydraulic actuator except for a boom raising operation; and a third position for merging the hydraulic fluid into the first circuit while blocking it from the second circuit upon the boom raising operation.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: November 10, 2015
    Assignee: KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Yoshimi Saotome, Shota Oguma
  • Patent number: 9163619
    Abstract: A valve actuator control system for use with a valve actuator may include two pump assemblies, two control valve assemblies, two transducers, a fluid reservoir, and a controller assembly. The controller assembly may actuate the pump assemblies to direct fluid from the fluid reservoir to the valve actuator, and may actuate the control valve assemblies to direct fluid from the valve actuator to the fluid reservoir. A method of actuating a valve actuator using a valve actuator control system may comprise sending a signal to the valve actuator control system, injecting pressurized fluid from a fluid reservoir of the valve actuator control system into a first chamber of the valve actuator, discharging pressurized fluid from a second chamber of the valve actuator into the fluid reservoir, and actuating the valve actuator from a first position to a second position.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: October 20, 2015
    Assignee: SAFOCO, INC.
    Inventor: David Lymberopoulos
  • Publication number: 20150135700
    Abstract: This invention consists of the addition of a novel clutch arrangement which facilitates speed changing gears on both the output and input of the transmission and provides for a compact packaging configuration for a plurality of hydraulic pump/motors. The use of a small accumulator without a valve and a related reservoir absorbs the pressure shocks from rapidly opening and closing the valves that that select or de-select the pump/motors. It is also disclosed that two adjacent pump/motors on the same shaft can be constructed such that they share an input or output port thereby reducing the size of the combination. The transmission can perform the retarder function by placing a flow retarding valve in the re-circulating path in one or more of the pump/motors.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 21, 2015
    Inventor: ROBERT HUGH FRANCIS LLOYD
  • Publication number: 20150107237
    Abstract: Provided is a hydraulic engine that generates power using oil pressure, the hydraulic engine including: a hydraulic power unit including a hydraulic tube comprising a hollow portion having an opened front end and being filled with a fluid, an amplitude amplification device that is disposed at the rear side of the hydraulic tube, an oscillator that is disposed at the rear side of the amplitude amplification device so as to be deformed and increases and decreases a pressure within the hydraulic tube, and an oscillator head that is attached to a front end of the oscillator.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 23, 2015
    Inventor: Lucas IHSL
  • Patent number: 9010105
    Abstract: A drive train configuration is disclosed. The drive train configuration has a transmission or transaxle assembly which may be directly mounted to a vehicle frame. The drive train configuration also comprises an engine that may be attached to a housing of the transmission or transaxle portion. The drive train configuration may also have a power take off mechanism.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: April 21, 2015
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Michael L. Bennett, Raymond Hauser
  • Patent number: 8997478
    Abstract: A work vehicle has a pump group with two fixed-displacement pumps, an electro-hydraulic diverter openable to divert flow from one of the pumps to a fluid reservoir, and a controller configured to command the diverter to open.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: April 7, 2015
    Assignee: Deere & Company
    Inventors: Erik W. McWethy, Mark D. Anderson
  • Publication number: 20150059330
    Abstract: A fluid delivery system includes a first hydraulic circuit, and a second hydraulic circuit. The first hydraulic circuit includes a first hydraulic pump, and a first hydraulic motor. The first hydraulic motor is fluidly connected to the first hydraulic pump and is configured to be driven by the first hydraulic pump. The second hydraulic circuit includes a second hydraulic pump, and a second hydraulic motor. The second hydraulic pump is mechanically coupled to the first hydraulic motor and configured to be driven by the first hydraulic motor. The second hydraulic motor is disposed in loop with the second hydraulic pump and configured to be driven by the second hydraulic pump. The fluid delivery system further includes a delivery pump mechanically coupled to the second hydraulic motor and fluidly connected to a fluid source. The delivery pump is configured to deliver a pressurized fluid.
    Type: Application
    Filed: September 5, 2013
    Publication date: March 5, 2015
    Applicant: Caterpillar Inc.
    Inventors: Balamurugesh Thirunavukarasu, Monte C. Cook
  • Patent number: 8966890
    Abstract: A hydraulic system having an actuator having a piston and associated rod forming head and rod chambers and being adapted to move between retracted and extended positions within a cylinder, and first and second sources of fluid. A first pump provides fluid from the first source to the head chamber at a first pressure. At least one valve provides fluid from the second source at a second pressure to supplement fluid provided to the head chamber from the first pump when the second pressure is greater than the first pressure.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: March 3, 2015
    Assignee: Caterpillar Inc.
    Inventors: Daniel T. Mather, Troy A. Shawgo, Daniel H. Killion, Vishnu Irigireddy, Deepak Amaravadi, Dayao Chen, Matthew Hempel, Kenneth A. Dust, Ryan M. Ludwig, Alfred J. Abraham, Michael E. Nesbitt
  • Publication number: 20150048188
    Abstract: A wood chipping system including a vehicle having an engine and a power take off attached to and selectively powered by the engine. A hydraulic pump is positioned on the vehicle and is driven by the power take off. The system can include a towable support having a chipper mounted thereon, the chipper having a chipper drum driven by a hydraulic motor, the hydraulic motor driving a hydraulic pump that drives a feed roll system of the chipper. The system can include a brake valve associated with the main motor to stop rotation of the chipper drum.
    Type: Application
    Filed: August 15, 2013
    Publication date: February 19, 2015
    Inventor: Jarmo Harsia
  • Patent number: 8943819
    Abstract: A hydraulic system includes a variable displacement first pump, a first linear actuator fluidly connected to the first pump via a first closed-loop circuit, a variable displacement second pump, and second and third linear actuators fluidly connected to the second pump in parallel via a second closed-loop circuit. The system also includes a variable displacement third pump, a fourth linear actuator fluidly connected to the third pump via a third closed-loop circuit, a variable displacement fourth pump, and a first rotary actuator fluidly connected to the fourth pump via a fourth closed-loop circuit. The system further includes a second rotary actuator fluidly connected to the second pump in parallel with the second and third linear actuators. The system also includes a third rotary actuator fluidly connected to the third pump in parallel with the fourth linear actuator.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: February 3, 2015
    Assignee: Caterpillar Inc.
    Inventor: Michael L. Knussman
  • Patent number: 8919114
    Abstract: A hydraulic system is disclosed having first, second, and third pumps. The hydraulic system may also have a first actuator connected to the first pump in closed-loop manner, a second actuator connected to the second pump in closed-loop manner, and a third actuator. The hydraulic system may further have a selector valve associated with the third pump, and a first switching valve associated with the third pump and the third actuator. The first switching valve may be movable between a first position at which the third pump is connected to the third actuator in a closed-loop manner to move the third actuator in a first direction, a second position at which the third pump is connected to the third actuator in a closed-loop manner to move the third actuator in a second direction, and a third position at which the third pump is connected to the selector valve.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: December 30, 2014
    Assignee: Caterpillar Inc.
    Inventors: Brad A. Edler, Jeffrey L. Kuehn, Jeremy T. Peterson, Michael T. Verkuilen
  • Patent number: 8910562
    Abstract: A pneumatic system controlling a bath crust breaker includes a cylinder defining a piston chamber. A piston is slideably displaced within the cylinder by pressurized fluid directed to either a piston chamber first portion with respect to the piston or a piston chamber second portion oppositely positioned about the piston. A pneumatic valve system includes a first control valve aligned between first control valve first and second positions, the first control valve first position aligned with the first portion, and in the first control valve second position is aligned with the second portion. A second control valve is aligned between second control valve first and second positions. An orifice between a pressure source and first control valve is sized to control fluid flow rate so a pressure reached in either the first or second portion during a crust breaking cycle is less than a pressure source maximum pressure.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: December 16, 2014
    Assignee: MAC Valves, Inc.
    Inventor: Gilles Beaulieu
  • Patent number: 8887500
    Abstract: A hydraulic transaxle comprises a transaxle housing, an axle, a hydraulic pump, a hydraulic motor, a hydraulic circuit, and a pair of auxiliary pumps. The transaxle housing defines a fluid sump therein. The axle is supported by the transaxle housing. The hydraulic motor is disposed in the transaxle housing so as to drive the axle. The hydraulic pump is disposed in the transaxle housing so as to supply hydraulic fluid to the hydraulic motor. The hydraulic circuit is disposed in the transaxle housing so as to fluidly connect the hydraulic pump to the hydraulic motor. The pair of auxiliary pumps are disposed in the transaxle housing so as to supply fluid from the fluid sump to outside of the transaxle housing.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: November 18, 2014
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Hideki Kanenobu, Masaru Iida, Koji Iwaki, Shinya Sakakura
  • Patent number: 8869521
    Abstract: An apparatus includes a first plurality of cylinders, each coupled to a shared first port by a separate first valve and to a shared second port by a separate second valve. Each first and second valve has a chamber to which pressure from either the associated cylinder or the respective port is dynamically applied to select different operating modes. Each one of a second plurality of cylinders is coupled to the first port by a separate third valve and to a shared third port by a separate fourth valve. Each third and fourth valve has a chamber to which pressure from either the associated cylinder or the respective port is dynamically applied to select different operating modes. Selecting an operating mode enables the apparatus to act as a bidirectional pump or a hydraulic motor. Selectively controller the valves can deactivate an individual cylinder, while other cylinders remain active.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: October 28, 2014
    Assignee: Husco International, Inc.
    Inventors: Dwight B. Stephenson, Prashant K. Rajput
  • Publication number: 20140298783
    Abstract: A hydraulic control device that controls a hydraulic pressure for a plurality of friction engagement elements included in an automatic transmission mounted on a vehicle to establish a plurality of shift speeds, including: a plurality of pressure regulation valves, a plurality of hydraulic switches, speed change control means, and abnormality determination means.
    Type: Application
    Filed: November 15, 2012
    Publication date: October 9, 2014
    Applicant: AISIN AW CO., LTD.
    Inventors: Tomoya Jinno, Munehiro Tashiro, Masamichi Yamaguchi, Tetsuya Shimizu, Kazunori Ishikawa
  • Publication number: 20140271066
    Abstract: A hydraulic system for a vehicle includes a first hydraulic circuit, a second hydraulic circuit, and a main actuator. The first hydraulic circuit includes a first pump having a flow outlet; a first pressure line having a pump end coupled to the flow outlet of the first pump; and a first load sensing line having a pump end coupled to the first pump and a pressure end coupled to the first pressure line. The second hydraulic circuit includes a second pump having a flow outlet; a second pressure line having a pump end coupled to the flow outlet of the second pump; and a second load sensing line having a pump end coupled to the second pump and a pressure end coupled to the second pressure line. The main actuator is coupled to the first pressure line and the second pressure line and is configured to oppose a load force. The first load sensing line is separate from the second load sensing line such that the first pump and the second pump respond independently to the load force.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: OSHKOSH CORPORATION
    Inventor: Yanming Hou
  • Publication number: 20140246792
    Abstract: The invention captures harvestable mechanical energy, e.g., in the form of wind or moving water, and uses it for electrical generation or other work. In various embodiments a turbine is used to pressurize a fluid, and the pressurized fluid is then optionally stored and then used to drive an electric generator. Because the pressurized fluid can be stored in a pressurized state indefinitely, the invention provides a straightforward way to accumulate the mechanical energy until it is needed. Additionally, the invention allows portions of the system, e.g., a pressure vessel or generator, to be located away from the turbine, reducing the costs of deploying and maintaining the system.
    Type: Application
    Filed: February 11, 2014
    Publication date: September 4, 2014
    Applicant: CURIOSITATE, INC.
    Inventor: Elan Y. Pavlov
  • Patent number: 8806862
    Abstract: A smart flow sharing system, useful in hydraulic systems having more than one hydraulically demanding equipment function wherein more than one of the hydraulically demanding functions are sometimes activated at the same time, has modified hydraulic passages and at least two fixed displacement pumps. The system automatically prioritizes hydraulic fluid flow so that when only one of two hydraulically demanding functions is activated by an operator, it receives the hydraulic fluid flow from both fixed displacement pumps, but when both hydraulically demanding functions are activated, one of the functions receives hydraulic fluid flow from the first fixed displacement pump, and the other function separately receives hydraulic fluid flow from the second fixed displacement pump. The smart flow sharing system accomplishes the foregoing without resorting to complex hydraulics or expensive additional components.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: August 19, 2014
    Assignee: Parker-Hannifin Corporation
    Inventor: Jarmo Antero Harsia
  • Patent number: 8713931
    Abstract: A working vehicle, wherein flows of hydraulic oil delivered under pressure from two or more hydraulic pumps are joined together and the joined hydraulic oil can be taken out. A working vehicle is provided with two hydraulic pumps independent of each other and adapted to deliver hydraulic oil under pressure, a mode switching valve (230) capable of being switched to a flow joining position (K) at which flows of the hydraulic oil delivered under pressure by the two hydraulic pumps are joined together, PTO ports (260, 261) out of which the hydraulic oil is taken, and a PTO switching valve (240) provided downstream of the mode switching valve (230) and switching flow of the hydraulic oil so that the oil can be delivered under pressure to the PTO ports (260, 261).
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: May 6, 2014
    Assignee: Yanmar Co., Ltd.
    Inventors: Kunihiko Sakamoto, Riki Fujita, Masaaki Yamashita, Nagahiro Ogata, Yousuke Yamashita
  • Patent number: 8707692
    Abstract: A center section or other mounting member for mounting and hydraulically connecting a pump and motor, includes a first piece having a running surface for the pump and connected to hydraulic porting and a second separable piece having a running surface for the motor and connected to the hydraulic porting. A spacer is disposed between the first piece and the second piece for hydraulically connecting the first piece and the second piece and for modifying the distance between the pump running surface and the motor running surface, whereby the first piece is physically separated from the second piece. Two such mounting members may be used at opposite ends of a main housing with a drive device having two pumps and two motors.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: April 29, 2014
    Assignee: Hydro-Gear Limited Partnership
    Inventor: Raymond Hauser
  • Patent number: 8701399
    Abstract: A pair of dozer control valves V3, V6 concurrently operable; a pilot pressure valve V14 switchable between an independent position 27 where, when only track devices 5 are operated, discharged fluid from one hydraulic-fluid discharge port P1 is independently supplied to one track control valve and one dozer control valve, and discharged fluid from the other hydraulic-fluid discharge port P2 is independently supplied to the other track control valve and the other dozer control valve, and a merging position 28 where, when the other control valves are operated, discharged fluid from the one hydraulic-fluid discharge port and from the other hydraulic-fluid discharge port are merged and supplied to the control valves V1 to 10; and pressure compensation valves V11 in the control valves and for distributing hydraulic fluid at flow rates based on extent of actuation of the other control valves operated, irrespective of the magnitude of the loads.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: April 22, 2014
    Assignee: Kubota Corporation
    Inventor: Hiroshi Horii
  • Publication number: 20140090369
    Abstract: A hydraulic drive device for a hydraulic excavator, includes: a first hydraulic pump; a first boom directional control valve and a second arm directional control valve which are connected in parallel to the first pump; a second hydraulic pump; and a second boom directional control valve and a first arm directional control valve which are connected in parallel to the second pump; wherein: the hydraulic drive device also includes: a third hydraulic pump; a third boom directional control valve connected to the third pump and controlling the flow of pressure oil supplied to a boom cylinder; and a third arm directional control valve connected in tandem with the third boom directional control valve and controlling the flow of pressure oil supplied to an arm cylinder.
    Type: Application
    Filed: May 17, 2012
    Publication date: April 3, 2014
    Applicant: Hitachi Contruction Machinery Co., Ltd.
    Inventors: Tsuyoshi Nakamura, Kazunori Nakamura, Yasuo Okano, Kouji Ishikawa, Kensuke Sato, Hiroyuki Azuma, Mitsuhiko Kanehama, Yusuke Kajita
  • Patent number: 8640452
    Abstract: A hydraulic fluid circuit for a power transmission device includes a first hydraulic circuit segment fluidly decoupled from a second hydraulic circuit segment. A hydraulic pump includes a first fluidic pumping element and a second fluidic pumping element. The first fluidic pumping element fluidly communicates with the first hydraulic circuit segment. The second fluidic pumping element fluidly communicates with the second hydraulic circuit segment. The first fluidic pumping element is controllable to a first pump operating point to achieve a preferred high fluidic flow rate in the first hydraulic circuit segment. The second fluidic pumping element is controllable to a second pump operating point to achieve a preferred high fluidic pressure in the second hydraulic circuit segment.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: February 4, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: John C. Schultz, Norman Schoenek, Kevin Michael Dougan, Edwin T. Grochowski, Daryl A Wilton, Edward W. Mellet
  • Publication number: 20140007566
    Abstract: Provided is a construction machine, wherein an upper slewing body comprises a slewing frame and first and second power units, and wherein the second power unit comprises a second engine, a second controller to control driving of the second engine, a second hydraulic oil tank, a second hydraulic pump configured to be driven by the second engine to thereby suck hydraulic oil from the second hydraulic oil tank and discharge the hydraulic oil toward a hydraulic actuator, a second fuel tank configured to store fuel, and a second support member supporting the second engine, the second hydraulic oil tank, the second hydraulic pump and the second fuel tank, and wherein the second support member is configured to be attachable and detachable with respect to the slewing frame independently of a first support member of the first power unit, and the second hydraulic pump is detachably connected to the hydraulic actuator.
    Type: Application
    Filed: July 3, 2013
    Publication date: January 9, 2014
    Inventors: Tomohiko ASAKAGE, Hironori TAKENAKA
  • Publication number: 20140007468
    Abstract: A dipper assembly for a mining shovel includes a dipper body, a dipper door pivotably coupled to the dipper body, an arm, a housing coupled to one of the body and the door, and a piston. The arm includes a first end pivotably coupled to the body and a second end pivotably coupled to the door. The movement of the door relative to the body drives the arm to pivot relative to the body. The housing includes an inlet in fluid communication with a fluid source, an outlet, and a cylinder partially defining a pump chamber in fluid communication with the inlet and the outlet. The piston is movable within the cylinder and biased in a first direction. The pivoting movement of the arm causes the piston to move in a second direction opposite the first direction. The movement of the piston changes a volume of the pump chamber.
    Type: Application
    Filed: July 9, 2013
    Publication date: January 9, 2014
    Inventors: Matthew L. Gross, Joseph J. Colwell
  • Patent number: 8596056
    Abstract: A configurable hydraulic system facilitates a variety of oilfield cementing and other oilfield or related applications. The system employs a plurality of prime movers to drive a plurality of loads. The plurality of prime movers and loads are coupled with a configurable hydraulic system that maintains a separate, sealed hydraulic system associated with each prime mover. The configurable hydraulic system also enables the load configuration driven by each prime mover to be changed without losing the benefit of a separate, sealed hydraulic system associated with each specific prime mover.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: December 3, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Michael Woodmansee, Philip Zsiga, Josh Rayner
  • Patent number: 8572958
    Abstract: A hydraulic energy source for supplying a downstream hydraulic system with hydraulic energy. In particular, a hydraulic system for controlling and/or cooling a transmission preferably a dual clutch transmission. The hydraulic energy source enables a first partial volume flow which is produced at a comparatively high system pressure and which is used to supply an actuator of the hydraulic system and a second partial volume flow which is produced at a comparatively low cooling pressure and which is used to cool the hydraulic system, to be produced The hydraulic energy source has an electrically driveable first volume flow source which is used to produce the first partial volume flow and a second volume flow source which is used to produce the second partial volume flow. The second volume flow source is drivingly connected independently of an internal combustion engine.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: November 5, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Marco Grethel, Martin Staudinger
  • Patent number: 8572957
    Abstract: A hydraulic system for construction equipment is provided, which can increase the driving speed of a corresponding working device by making hydraulic fluid of a hydraulic pump, which is added to the hydraulic system having two hydraulic pumps in the construction equipment, join hydraulic fluid on the working device side, and can intercept the supply of hydraulic fluid from the working device side to a traveling apparatus side when the working device and the traveling apparatus are simultaneously manipulated.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: November 5, 2013
    Assignee: Volvo Construction Equipment Holding Sweden AB
    Inventors: Toshimichi Ikeda, Yang Koo Lee
  • Publication number: 20130239561
    Abstract: A hydraulic transaxle comprises a transaxle housing, an axle, a hydraulic pump, a hydraulic motor, a hydraulic circuit, and a pair of auxiliary pumps. The transaxle housing defines a fluid sump therein. The axle is supported by the transaxle housing. The hydraulic motor is disposed in the transaxle housing so as to drive the axle. The hydraulic pump is disposed in the transaxle housing so as to supply hydraulic fluid to the hydraulic motor. The hydraulic circuit is disposed in the transaxle housing so as to fluidly connect the hydraulic pump to the hydraulic motor. The pair of auxiliary pumps are disposed in the transaxle housing so as to supply fluid from the fluid sump to outside of the transaxle housing.
    Type: Application
    Filed: March 15, 2012
    Publication date: September 19, 2013
    Inventors: Hideki KANENOBU, Masaru Iida, Koji Iwaki, Shinya Sakakura
  • Publication number: 20130232964
    Abstract: A hybrid power source includes an electric power source, a first hydraulic pump powered by the electric power source, a hydrocarbon burning power source, and a second hydraulic pump powered by the hydrocarbon burning power source. A hydraulic fluid output is fed by a combined output from the first hydraulic pump and the second hydraulic pump. A controller is provided for dynamically calculating hydraulic fluid requirements at the hydraulic fluid output as work is performed. The hydraulic fluid requirements are primarily provided by the first hydraulic pump powered by the electric power source and supplemented, as directed by the controller, by the second hydraulic pump powered by the hydrocarbon burning power source.
    Type: Application
    Filed: November 15, 2010
    Publication date: September 12, 2013
    Inventors: Shawn James Nielsen, Sinisa Dobrijevic
  • Patent number: 8528325
    Abstract: A pump apparatus for use on a vehicle or industrial application having a housing in which an end cap is disposed. Multiple hydraulic pumps driven by a prime mover are mounted on the end cap and connected to hydraulic ports formed in the end cap. An auxiliary pump may be drivingly coupled to the prime mover and a power take off unit may also be connected thereto. The end cap may further include a charge pump mounting surface and a charge port for connecting a charge pump.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: September 10, 2013
    Assignee: Hydro-Gear Limited Partnership
    Inventor: Raymond Hauser
  • Patent number: 8522541
    Abstract: Second-gear blocking switching valves 101 to 104 are provided in pipe lines providing communication between remote control valves 22, 24 and pilot operation portions of valve sections of second-gear spools of control valves. A switching selection means 105 switches the second-gear blocking switching valves 101 to 104. Proportional pressure reduction valves 111 to 114 change secondary pressure to be outputted in accordance with secondary pressure of the remote control valves. Secondary pressure changing switching valves 116 to 119 are provided in pipe lines providing communication between the remote control valves and pilot operation portions of valve sections of first-gear spools of the control valves.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: September 3, 2013
    Assignee: Kobelco Cranes Co., Ltd.
    Inventor: Katsuki Yamagata
  • Publication number: 20130213031
    Abstract: Disclosed is a hydraulic system for a construction machine, which makes it possible to adjust the geometric position of a working device comprising a boom and an arm by means of a single manipulation lever, thereby enabling a leveling/flattening process to be conveniently performed. The hydraulic system includes: a working mode selection switch for selecting a leveling/flattening process; a boom driving switch valve for controlling the driving of a boom cylinder in response to a control signal from a first manipulation lever; an arm driving switch valve for controlling the driving of an arm cylinder in response to a control signal from a second manipulation lever; a shuttle valve including input parts that connect to both an electronic proportional control valve and to the first manipulation lever, respectively, and an output part connecting to the boom driving switch valve; and an electronic controller.
    Type: Application
    Filed: October 20, 2010
    Publication date: August 22, 2013
    Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventors: Jae-Whan Ok, Jin-Youn Choi
  • Patent number: 8505289
    Abstract: A fixed/variable hybrid system has modified constant flow open center hydraulic valves (“fixed/variable valves”), including an open center core, spools, a power core, and a tank galley. A small fixed displacement pump provides fluid at a constant rate to the open center core. A variable displacement piston pump provides fluid directly to the power core as needed. Activation of spools partially restricts the open center core causing an increase in fluid pressure that is communicated to the variable displacement piston pump's load sense signal port, causing the pump to increase fluid flow and pressure to the power core. Activated spools direct pressurized fluid from the power core to the applications through selected hydraulic ports. Activated spools also direct fluid flow from selected hydraulic ports via the tank galley to a hydraulic tank. Pumping the majority of fluid only on an as-needed basis results in significant efficiencies.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: August 13, 2013
    Assignee: Parker Hannifin Corporation
    Inventor: Jarmo Antero Harsia
  • Publication number: 20130174541
    Abstract: A device for a vehicle or a production machine, having: a first hydraulic pump, which hydraulically drives a load; an internal combustion engine, which mechanically drives the first hydraulic pump; a second hydraulic pump, which is hydraulically coupled to the first hydraulic pump; an apparatus, which drives the second hydraulic pump while utilizing the energy in the exhaust gas stream of the internal combustion engine; the load on the output side being directly connected to a tank.
    Type: Application
    Filed: May 11, 2011
    Publication date: July 11, 2013
    Inventors: Hinrich Meinheit, Boris Buchtala, Bojan Ferhadbegovic
  • Publication number: 20130145758
    Abstract: A hydraulic module includes a pump housing with an opening in communication with an exterior surface of the pump housing. A plurality of pump chambers are in communication with the opening. A plurality of pump elements correspond to the plurality of pump chambers, each of the plurality of pump elements being movable within the respective one of the pump chambers to increase the pressure in a fluid from a suction side of the pump chamber to a pressure side of the pump chamber. A motor has an output member extending into the opening of the pump housing and coupled with the plurality of pump elements. A channel is formed in the exterior surface of the pump housing. The channel establishes fluid communication between the plurality of pump chambers.
    Type: Application
    Filed: December 13, 2011
    Publication date: June 13, 2013
    Applicant: ROBERT BOSCH GMBH
    Inventors: Guy Michalski, Douglas Patterson, Bernhard Gnamm
  • Patent number: 8459019
    Abstract: A system and method for operating a two-stage, high-pressure pumping system includes a low-pressure pump having an output configured to deliver a hydraulic fluid under a low-pressure at a high-volume to drive a tool associated with the two-stage, high-pressure, pumping system under low load conditions. The system also includes a high-pressure pump having an output configured to deliver the hydraulic fluid under a high-pressure at a low-volume to drive the tool under high load conditions. A pilot-operated device is included that is configured to selectively drive the tool with pressure from at least one of the output of the low-pressure pump and the output of the high-pressure pump. The pilot-operated device receives pilot pressure from the output of the low-pressure pump to control selectively driving the tool with the output of the two stage pump.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: June 11, 2013
    Assignee: Actuant Corporation
    Inventor: Paul A. Hohensee
  • Publication number: 20130091833
    Abstract: A hydraulic control system and a hydraulic control method are disclosed. The hydraulic control system comprises a first closed pump (P1) and a first engine (M1) connected with each other, a second closed pump (P2) and a second engine (M2) connected with each other, and a hydraulic motor (P3). The first closed pump (P1), the second closed pump (P2) and the hydraulic motor (P3) are connected in parallel. Compared with the prior art, the present hydraulic control system has advantages of wider engine model selection range, higher reliability and better micro-motion performance.
    Type: Application
    Filed: April 11, 2011
    Publication date: April 18, 2013
    Applicants: HUNAN ZOOMLION SPECIAL VEHICLE CO., LTD, ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY CO. LTD.
    Inventors: Chunxin Zhan, Quan Liu, Yuan Zhang, Chunyang Song, Shaojun Wang, Zhihua Yuan
  • Patent number: 8387376
    Abstract: A hydraulic system with an improved complex operation is provided, which can prevent the generation of shock in a boom by delaying pressure supply during start and end of pilot signal pressure supplied to a spool for controlling an option device when a boom ascending operation and an operation of an option device are simultaneously performed or when such a simultaneous operation of the boom and the option device switches over to an independent operation of the boom.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: March 5, 2013
    Assignee: Vovlvo Construction Equipment Holding Sweden AB
    Inventor: Young Jin Son
  • Publication number: 20130047600
    Abstract: In open-circuit hydraulic systems (1), the cross-sections of the supply lines (6) and input valves of the hydraulic pump (3) have to be large, so that sufficient flow flux can be provided. This hinders a reduction of the size of the pump and the whole hydraulic system. It is suggested that the supply flow (7) of a hydraulic pump (3) is charged by a second, charging pump (2), to a mid-pressure level (7). The cross-sections of the supply flow areas can thus be decreased.
    Type: Application
    Filed: October 24, 2012
    Publication date: February 28, 2013
    Applicant: Sauer-Danfoss ApS
    Inventor: Sauer-Danfoss ApS
  • Patent number: 8375711
    Abstract: An improved vacuum material handler having an onboard drive engine powering a vacuum pump and a hydraulic pump. The vacuum material handler also having a frame with integrated forklift lugs.
    Type: Grant
    Filed: January 19, 2009
    Date of Patent: February 19, 2013
    Assignee: Vaculift, Inc.
    Inventors: William J. Solomon, Darrell Hocutt
  • Publication number: 20130036730
    Abstract: A hybrid power distribution system for an aircraft generates hydraulic power from one of a plurality of power sources based on which power source provides energy most efficiently. Power sources includes an electric power distribution bus that distributes electrical energy onboard the aircraft, a pneumatic distribution channel that distributes pneumatic energy onboard the aircraft, and mechanical power provided by one or more engines associated with the aircraft.
    Type: Application
    Filed: August 10, 2011
    Publication date: February 14, 2013
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Louis J. Bruno, Anthony C. Jones, Todd A. Spierling, Gregory L. DeFrancesco