With Means Purging, Cleaning Or Separating Undesirables From Motive Fluid Patents (Class 60/453)
  • Patent number: 11983000
    Abstract: A device for outputting a future state of a central lubrication system includes at least one sensor for recording a parameter of the central lubrication system, a processing unit for processing the recorded parameter, determining a current state of the central lubrication system based on the processed parameter, and estimating a future state of the central lubrication system over a certain period of time based on the current state and stored data, and an output unit for outputting the future state of the central lubrication system.
    Type: Grant
    Filed: May 6, 2021
    Date of Patent: May 14, 2024
    Assignee: SKF LUBRICATION SYSTEMS GERMANY GMBH
    Inventors: Stefan Gebauer, Armin Guenther, Dieter Hess, Juergen Kreutzkaemper, Andreas Stellmach
  • Patent number: 11499574
    Abstract: A fluid leakage detection device includes: a rod seal provided in a cylinder head, a rod seal being configured to seal an annular gap between a piston rod and the cylinder head; a detection seal configured to seal an annular gap, a detection seal being configured to partition the detection space together with the rod seal; a communication passage in communication with the detection space; a pressure sensor configured to detect the pressure of the working oil guided through the communication passage; and a relief valve configured to release the pressure in the communication passage, wherein the detection seal is provided between the rod seal and a dust seal, the dust seal being configured to seal the annular gap by being provided in the cylinder head so as to face the outside of the cylinder tube.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: November 15, 2022
    Assignee: KYB CORPORATION
    Inventor: Yusuke Takahashi
  • Patent number: 11339810
    Abstract: A fluid leakage detection system includes: a measurement unit configured to detect leakage of working oil in a hydraulic cylinder; and a controller configured to acquire a measurement result from the measurement unit, wherein the controller diagnoses that a battery depletion has been caused in a battery in a case in which it is determined that a data from the measurement unit has not been acquired and it is determined that the battery of the measurement unit has been in a low-remaining-battery-level state, and the controller diagnoses that a communication abnormality has been caused in a first communication part of the measurement unit in a case in which it is determined that the data from the measurement unit has not been acquired and it is determined that the battery has not been in the low-remaining-battery-level state.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: May 24, 2022
    Assignee: KYB CORPORATION
    Inventors: Takayoshi Kikuchi, Keitaro Yoshida, Takahiro Iwamoto
  • Patent number: 11264884
    Abstract: A vehicle linear motor includes: a tubular casing; a pair of armatures placed and fixed in the casing; a mover formed in a flat plate shape and placed to face the pair of armatures and to be movable in the casing; and a support member configured to slidably support the mover such that the mover moves in a longitudinal direction of the mover. The mover formed in the flat plate shape includes a plurality of magnets that are arranged at intervals in the longitudinal direction. Each of the pair of armatures has a magnetic pole that is arranged to move the mover relative to the armatures in the longitudinal direction. The casing is mounted on a vehicle such that the longitudinal direction is a horizontal direction, and the mover and the armatures are placed to face each other in the horizontal direction.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: March 1, 2022
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Yoshinori Kawai, Kan Kobayashi, Hiroshi Chikuma, Aya Mizukoshi
  • Patent number: 10859148
    Abstract: A modular porting manifold for a hydrostatic transmission that serves as an end cover for the hydraulic motor, and which may be modularly interfaced with multiple different pump configurations having the same or similar pump interface across the different pump configurations. A pump interfacing section of the porting manifold may have a mating surface that interfaces with a corresponding mating surface of an outwardly addressable manifold of the pump. The pump interfacing section of the porting manifold may have at least two ports for communication of hydraulic fluid with the pump, in which the at least two ports are laterally spaced apart in the same horizontal plane to align with at least two corresponding ports on the pump manifold that are also in the same horizontal plane, which may provide less complex and easier to manufacture flow passages for the porting manifold and/or pump end block.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: December 8, 2020
    Assignee: Parker-Hannifin Corporation
    Inventors: Jason Scot Richardson, Thomas Kevin Castle, David Mark Heathcoat, Jr.
  • Patent number: 10661521
    Abstract: An automatic residual load relief system for hydraulic compactors having rotary pumps relieves residual load inherent in the compacted material by releasing hydraulic fluid from the cylinder prior to reversal of the rotary pump while preventing the fluid from returning to the pump. The system comprises in general a rotary pump powered by a motor, one-way suction check valves, a flow check valve, a one-way, normally-open, pilot operated check valve, a cylinder comprising a reciprocating piston, the piston defining a disk void and an annular void within the cylinder, and a tank.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: May 26, 2020
    Inventors: Anatoly D. Lee, Kim Kawasaki
  • Patent number: 10584781
    Abstract: The present disclosure relates to a hydro-mechanical transmission having two rotating groups that mount on a common shaft. At least one of the rotating groups operates as a variable displacement pump or motor. At least one of the rotating groups interacts with a torque transfer unit rotatable about the shaft axis relative to both the shaft and the rotating group. The torque transfer unit includes a valve plate, a swash plate and a torque output section that all rotate in unison with one another about the shaft axis relative to the shaft and the rotating group. The valve plate includes an inlet passage for inletting hydraulic fluid to the rotating group and an outlet passage for outletting hydraulic fluid from the rotating group.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: March 10, 2020
    Assignee: Eaton Intelligent Power Limited
    Inventor: Nikhil Shyamsunder Shetty
  • Patent number: 10041515
    Abstract: The present disclosure discloses a reducing noise double-channel oil pump including a pump body. The pump body connects an oil box and an actuator. Parallel distributed a small and a big flow oil channels are located between the oil box and the actuator. The small flow oil channel connects a first twin pump and first one-way valves. The big flow oil channel connects a second twin pump and second one-way valves. The pump body also disposes a reducing noise oil channel. A connection of the reducing noise oil channel and the big flow oil channel locates a one-way controlled valve. Another end of the reducing noise oil channel connects an oil pressure feedback oil way. A connection of the reducing noise oil channel and the oil pressure feedback oil way locates an oil pressure driving mechanism. The middle of the reducing noise oil channel connects an unloading oil way.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: August 7, 2018
    Assignee: JIASHAN HANDIJACK TOOLS CORP
    Inventor: Yonggang Fu
  • Patent number: 9677653
    Abstract: A hydrostatic transmission assembly includes a main housing and a housing cap sealed to the main housing 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: October 23, 2015
    Date of Patent: June 13, 2017
    Assignee: Hydro-Gear Limited Partnership
    Inventor: Michael L. Bennett
  • Patent number: 9010365
    Abstract: The present invention provides an apparatus and method for filtering fluid in a breather assembly and providing uncontaminated fluid to a reservoir. The breather allows in-take fluid traveling through a first flow path to be filtered before entering the reservoir through a first directional valve. The breather also allows exhaust fluid traveling through a second flow path, separate from the first flow path, to exit through a second directional valve.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: April 21, 2015
    Assignee: Parker-Hannifin Corporation
    Inventors: Albert F. Cella, Donald J. Gembolis, John A. Trott
  • Publication number: 20150089936
    Abstract: An aircraft hydraulic system for operating a plurality of hydraulically-operated actuators in the aircraft having a hydraulic reservoir in which hydraulic fluid is stored, a hydraulic distribution system coupling the hydraulic reservoir to the actuators and having a main flow line coupled to the hydraulic reservoir, a hydraulic pump fluidly coupled to the main flow line and the hydraulic reservoir to pump hydraulic fluid from the reservoir to the main flow line, a main filtration system fluidly coupled to the main flow line upstream of at least some of the actuators, and a self-cleaning filter fluidly coupled upstream of the main filtration system.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 2, 2015
    Applicant: GE Aviation Systems LLC
    Inventor: John S. Mears
  • Publication number: 20150052884
    Abstract: The present invention provides a hydraulic actuator arrangement 100 comprising a hydraulic actuator 110, a hydraulic fluid supply line 120 connected to the actuator for supplying hydraulic fluid to the actuator, and a bleed port 124 for enabling air in the hydraulic actuator arrangement to be bled out, wherein the hydraulic actuator arrangement further comprises a bleed line 130 connected to the bleed port to enable any hydraulic fluid bled through the bleed port to be conveyed along the bleed line.
    Type: Application
    Filed: July 25, 2014
    Publication date: February 26, 2015
    Inventor: Anthony BRACEY
  • Patent number: 8960227
    Abstract: A tank for a hydraulic fluid has a housing with opposed end walls and side walls defining an interior chamber. A primary baffle is disposed inside the housing and divides the interior chamber into an inlet chamber and an outlet chamber, with a primary gap between the primary baffle and the housing fluidly communicating between the inlet chamber and the outlet chamber. The primary baffle further defines a contact surface facing the inlet chamber and has first and second weirs which extend into the inlet chamber. A first fluid inlet fluidly communicates with the inlet chamber and is oriented along a first inlet axis that intersects the contact surface, while a fluid outlet communicates with the outlet chamber. The tank produces an interior flow that mixes and deaerates the fluid as it travels from the first fluid inlet to the fluid outlet.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: February 24, 2015
    Assignee: Caterpillar SARL
    Inventors: Sage Frederick Smith, Brian Franklin Taggart, Xuekui Lan, Weixue Tian
  • Patent number: 8833069
    Abstract: A closed hydrostatic circuit with variable charge and variable flushing systems is disclosed. A variable displacement charge pump is configured to supply charge fluid and pilot control fluid to the hydrostatic circuit. An electronically controlled pressure regulating valve is in communication with an output of the charge pump and is linked to a controller. When the hydrostatic control system detects a high hydraulic temperature condition, the electronically controlled pressure regulating valve, that is in communication with an output of the charge pump and that is linked to a controller, increases the charge pump flow. A bidirectional variable displacement hydrostatic motor is connected in parallel to two input/output lines. A flush valve is in communication with the hydrostatic motor and both input/output lines. The flush valve and hydrostatic motor are both in communication with the flush orifice and a flush relief valve.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: September 16, 2014
    Assignee: Caterpillar Inc.
    Inventors: Christopher J. Demick, Paul A. Dvorak, William Christopher Swick, Vincent Guyard, Christopher Mark Elliott, Christopher Pruess
  • Publication number: 20140230424
    Abstract: The invention relates to a hydraulic system, preferably for piloting and actuating a two-cylinder thick matter pump. The hydraulic system comprises a tank (68) for receiving hydraulic oil, a primary circuit having at least one hydraulic consumer (AH, MH) which has at least one primary pump (36, 38, 61, 70), which is loaded with hydraulic oil via a first suction line (42), and is connected on the outlet side to at least one first return line, and which has a suction/return filter (40) which communicates with the first suction line (42) on the outlet side and is loaded on the inlet side with return oil from the at least one return line. A special feature of the invention consists in that the first suction line (42) communicates with the tank (68) via a separate replenishing suction line (86) and a suction filter (66), wherein a replenishing suction valve (88) which is preloaded in the direction of the suction filter (66) is arranged in the replenishing suction line (86).
    Type: Application
    Filed: August 15, 2012
    Publication date: August 21, 2014
    Applicant: PUTZMEISTER ENGINEERING GMBH
    Inventors: Jan-Martin Veit, Markus Stass, Werner Muenzenmaier, Hans-Peter Renz
  • Publication number: 20140174070
    Abstract: A liquid and air separator includes a housing having a sloped floor and a domed roof, an adaptor, a spacer, a deflector having a plurality of perforations thereon, and a plurality of breathers, each of the plurality of breathers having a stepped portion.
    Type: Application
    Filed: March 1, 2013
    Publication date: June 26, 2014
    Applicant: Caterpillar Inc.
    Inventors: Isaiah Olateru, Mark Allott, Jeffrey R. Ries, Lynsey Hart
  • Patent number: 8701402
    Abstract: A reservoir-less power steering system having a hydraulic pump, a storage tube, a steering gear assembly, and a return line. The storage tube accommodates and provides hydraulic fluid to the hydraulic pump. Further, the hydraulic pump increases the hydraulic fluid pressure and transfers the pressurized hydraulic fluid to the steering gear assembly. A return line is connected to the steering gear assembly and coupled to the storage tube for returning the hydraulic fluid from the steering gear assembly to the hydraulic pump. Moreover, the storage tube extends upwards from the hydraulic pump to include a hydraulic fluid level measurement assembly.
    Type: Grant
    Filed: September 11, 2010
    Date of Patent: April 22, 2014
    Assignee: Ford Global Technologies, LLC
    Inventor: Kenneth Kamman
  • Publication number: 20140083290
    Abstract: Provided is a de-aeration device that de-aerates hydraulic fluid in a hydraulic system (10). The hydraulic fluid is controllably supplied to the de-aeration device (28) in response to one or more sensed parameters. Consequently, the de-aeration device can de-aerate fluid at strategic times during operation of the hydraulic system to prevent a decrease in system performance and prevent cavitation.
    Type: Application
    Filed: September 1, 2011
    Publication date: March 27, 2014
    Inventor: Eric William Larson
  • Patent number: 8615995
    Abstract: A fluid reservoir for a motor vehicle hydraulic brake system, having a housing with at least one fluid chamber, the housing preferably having a housing upper part and a housing lower part, a reservoir warning device for monitoring the reservoir filling level of the fluid reservoir, a filler neck for filling the fluid reservoir, a cap for fluid-tight closure of the filler neck, provisions for pressure balancing of the fluid reservoir and preferably a canister-shaped filling filter arranged in the area of the filler neck and having a wall and a base. In order to provide a cost-effective and easily assembled fluid reservoir, the filling filter, which reliably prevents the ingress of dirt, extends into the fluid chamber and includes a wall molded onto the housing of the fluid reservoir that adjoins the reservoir filler neck.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: December 31, 2013
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Hans-Jürgen Neumann, Peter Tandler, Stephan Schlicht
  • Patent number: 8590297
    Abstract: Apparatus and method for processing a process fluid at a remote location, with the apparatus including a pump located at a first location and configured to provide a pressurized working fluid. The apparatus also includes an umbilical coupled to the pump such that the umbilical receives the pressurized working fluid from the pump and transports the pressurized working fluid therefrom. The apparatus further includes a hydraulic turbine disposed at the remote location and coupled to the umbilical such that the hydraulic turbine receives the pressurized working fluid from the umbilical. The apparatus additionally includes one or more shaft energy conversion devices operatively coupled to the hydraulic turbine and disposed at the remote location.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: November 26, 2013
    Assignee: Dresser-Rand Company
    Inventors: H. Allan Kidd, William C. Maier
  • Patent number: 8491707
    Abstract: A fluid storage tank including an entrained air removal mechanism is provided. The entrained air removal mechanism assists in consolidating small air bubbles entrained within the fluid into larger bubbles such that the air bubbles have sufficient buoyancy to escape the fluid flow. The entrained air removal mechanism may be in the form of a plurality of saw toothed slots communicating different chambers within the fluid storage tank. The fluid storage tank can also be configured to direct fluid flow towards the sidewalls of the fluid storage tank as the fluid transitions from one chamber to another to promote heat transfer out of the fluid storage tank and to avoid the fluid within the tank acting as a thermal insulator.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: July 23, 2013
    Assignee: Helgesen Design Services, LLC
    Inventor: Bruce E. Knuth
  • Patent number: 8452510
    Abstract: A device includes: actual-intake-pipe-pressure detection unit (11); estimated-intake-pipe-pressure detection unit (12) for calculating an estimated intake pipe pressure based on a rotation speed of the engine and an opening degree of a throttle valve; pressure difference calculation unit (13) for calculating a pressure difference between the actual and estimated intake pipe pressures; pressure difference integration unit (14) for integrating the pressure difference with respect to time; pumping brake detection unit (15) for determining that a pumping brake operation is performed when a integral value is equal to or more than a first determination value; and throttle valve control unit (16) for carrying out control for the pumping brake during the pumping brake operation based on a result of the determination by the pumping brake detection unit (15), and carrying out ordinary control otherwise.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: May 28, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akiyoshi Katayama, Takashi Matsumoto
  • Patent number: 8439065
    Abstract: An auto bleed valve and method of bleeding a hydraulic system of an aircraft is accomplished by illuminating a plenum of a bleed valve using an LED oriented to illuminate a phototransistor when air is present in the plenum. A comparator circuit is used on an output of the phototransistor such that a predetermined voltage output corresponds to air detected in the plenum. An integrating circuit and a second comparator in series with the first comparator circuit is used to determine when a predetermined time period is met in which air is continuously detected in the plenum. Thereafter an air bleed solenoid can be used to vent the air upon a signal from the aircraft computer logic system.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: May 14, 2013
    Assignee: Parker-Hannifin Corporation
    Inventors: William Dirkin, Franklin C. Lee, William Lui
  • Patent number: 8336306
    Abstract: A hydraulic fluid cooling system for a pair of integrated hydrostatic transmissions includes a common reservoir holding hydraulic fluid and having hydraulic lines connecting the common reservoir to each integrated hydrostatic transmission, a hydraulic fluid reservoir inside each integrated hydrostatic transmission, and a pump for pumping fluid from each transmission's hydraulic fluid reservoir to the other transmission. Hydraulic fluid lines link each transmission's hydraulic fluid reservoir to the other transmission. The system pumps hydraulic fluid from the sump or reservoir of each integrated hydrostatic transmission to the other transmission, providing the cooling capacity of a non-loaded transmission to cool hydraulic fluid for a fully loaded transmission.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: December 25, 2012
    Assignee: Deere & Company
    Inventors: James E. Hardzinski, Bryan D. Blauwet, Damon C. Green, Michael L. Lentz
  • Patent number: 8215110
    Abstract: A hydraulic drive apparatus having a center section assembly for mounting inside a housing is disclosed. The center section includes generally flat side edge surfaces formed adjacent and perpendicular to a cylinder block running surface, and shaped to engage a channel formed in an internal surface of the housing to secure the center section to the housing. The assembly may also include a filter using a connection member to permit the filter to slide on and engage the peripheral edge of a flange formed on the center section.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: July 10, 2012
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Michael L. Bennett, Scott W. Keller
  • Patent number: 8122713
    Abstract: A hydraulic circuit of a servo-assisted mechanical transmission, which is provided with a number of hydraulic actuators provided with corresponding actuation chambers adapted to be filled with pressurized oil; the hydraulic circuit is provided with: a number of solenoid valves, each of which is coupled to a corresponding actuation chamber of a hydraulic actuator; a tank, which contains the oil at atmospheric pressure and is provided with an upper loading aperture; the cap, which closes the loading aperture of the tank and is provided with a through venting hole which puts the tank into communication with the external environment; a filtering element, which is coupled to the cap and is arranged under the venting hole; a hydraulic accumulator containing the pressurized oil; and an electric pump which draws from the tank and feeds the hydraulic accumulator.
    Type: Grant
    Filed: November 26, 2008
    Date of Patent: February 28, 2012
    Assignee: Magneti Marelli Powertrain S.p.A.
    Inventors: Giovanni Pepe, Pasquale Palumbo
  • Publication number: 20110277456
    Abstract: Apparatus and method for processing a process fluid at a remote location, with the apparatus including a pump located at a first location and configured to provide a pressurized working fluid. The apparatus also includes an umbilical coupled to the pump such that the umbilical receives the pressurized working fluid from the pump and transports the pressurized working fluid therefrom. The apparatus further includes a hydraulic turbine disposed at the remote location and coupled to the umbilical such that the hydraulic turbine receives the pressurized working fluid from the umbilical. The apparatus additionally includes one or more shaft energy conversion devices operatively coupled to the hydraulic turbine and disposed at the remote location.
    Type: Application
    Filed: May 12, 2011
    Publication date: November 17, 2011
    Applicant: DRESSER-RAND COMPANY
    Inventors: H. Allan Kidd, William C. Maier
  • Publication number: 20110067392
    Abstract: The present invention provides an apparatus and method for filtering fluid in a breather assembly and providing uncontaminated fluid to a reservoir. The breather allows in-take fluid traveling through a first flow path to be filtered before entering the reservoir through a first directional valve. The breather also allows exhaust fluid traveling through a second flow path, separate from the first flow path, to exit through a second directional valve.
    Type: Application
    Filed: May 21, 2009
    Publication date: March 24, 2011
    Inventors: Albert F. Cella, Donald J. Gembolis, John A. Trott
  • Publication number: 20110030364
    Abstract: A flow management system capable of providing adjustable hydraulic fluid flow or pressure at a common line to supply bidirectional pumps in electro-hydrostatic actuation systems and conditioning re-circulated hydraulic fluid. The system enables flow sharing between multiple actuation systems and minimization of energy consumption by a power-on-demand approach and/or electrical energy regeneration while eliminating the need for an accumulator. The system has particular application to electro-hydrostatic actuation systems that typically include bi-directional electric motor driven pumps and unbalanced hydraulic actuators connected within closed circuits to provide work output against external loads and reversely recover energy from externally applied loads.
    Type: Application
    Filed: February 11, 2009
    Publication date: February 10, 2011
    Applicant: Parker-Hannifin Corporation
    Inventors: Bengt-Goran Persson, Dale Vanderlaan, Lew Kasper
  • Patent number: 7854117
    Abstract: A center section assembly for mounting inside the housing of a hydrostatic or hydraulic drive apparatus is disclosed. The center section includes generally flat side edge surfaces formed adjacent and perpendicular to a cylinder block running surface, and shaped to engage a channel formed in an internal surface of the housing to secure the center section to the housing. The assembly may also include a filter using a connection member to permit the filter to slide on and engage the peripheral edge of a flange formed on the center section.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: December 21, 2010
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Michael L. Bennett, Scott W. Keller
  • Patent number: 7802971
    Abstract: The disclosure relates to a feed pump for hydraulic media having an input and an output. A pressure-reducing element is connected to the output, at the output of the element the system pressure being present and the output being connected to a consumer, wherein the output is connected to the first input of a pump controller, the second input being connected to the output of the pressure-reducing element, and wherein the pump controller adjusts the feed pump toward maximum delivery if the system pressure is smaller than a minimum pressure or if the system pressure is smaller than the feed pressure, and wherein parallel to the pump controller a pressure limiter is switched such that at the first input thereof the feed pressure is present and at the control input the system pressure is present, wherein the pressure limiter opens if the feed pressure is greater than a desired value.
    Type: Grant
    Filed: September 2, 2007
    Date of Patent: September 28, 2010
    Assignee: Joma-Hydromechanic GmbH
    Inventors: Willi Schneider, Torsten Helle
  • Publication number: 20100219289
    Abstract: Purge device and hydraulic system comprising such a purge device. The purge device (1) comprises a connecting tube (8) connecting a main pipe (5A) of a hydraulic system (1A) to a secondary pipe (6), a valve (9) mounted on this connecting tube (8) and able to be in either a closed or an open position, and means (10) for controlling this valve (9).
    Type: Application
    Filed: January 26, 2007
    Publication date: September 2, 2010
    Applicant: AIRBUS FRANCE
    Inventor: Christophe Vieules
  • Publication number: 20100186403
    Abstract: The hydrostatic system for the step less rotary movement transmission contains two hydrostatic motors with radial pistons (1 and 2) connected in push-pull configuration, the oil distribution system and the system for elimination of air and other volatile substances from the working spaces. The input of the gear box is connected to the engine (M) and the output is connected to the external load (W). In this push-pull configuration of both hydrostatic motors (1 and 2), the stators (1a and 2a) of both hydrostatic motors (1 and 2) are the active part of the gear box, while, the mounted on one and the same driven shaft (3) rotors (1b and 2b) of both hydrostatic motors (1 and 2) are the passive part of the system. In this configuration, the connection (4) containing the planetary gear box (4a) with the transmission ratio 1:?1 and the shafts (4b) mounted in housing (4c). It creates the situation that the stators (1a and 2a) of both hydrostatic motors have the same rotary speed but in the opposite direction.
    Type: Application
    Filed: April 29, 2009
    Publication date: July 29, 2010
    Inventor: Jacek Zaleski
  • Patent number: 7677038
    Abstract: There is provided a pump unit including plurality of hydraulic pumps respectively fluidly connected to plurality of hydraulic motors, which are disposed away from the pump unit, so as to form closed circuits, the pump unit including a pump case accommodating the plurality of hydraulic pumps so that the plurality of hydraulic pumps are operatively driven by a common power source; and a filter mounted at the pump case so as to be inserted in a charge passage for replenishing operation fluid from a fluid sump to the closed circuits.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: March 16, 2010
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Ryota Ohashi, Hironori Sumomozawa, Nobuhisa Kamikawa, Masahisa Kawamura
  • Patent number: 7670117
    Abstract: A fluid metering device for monitoring flow of fluid is provided. The fluid metering device comprises: an electric motor; and a housing having a manifold section, a motor adapter plate and a pressure retaining container, said pressure retaining container encompassing a pressurized chamber having a hydraulic pump placed in the pressurized chamber; and the manifold section including an air bleed valve and a pressure biased relief valve for maintaining pressure within the housing.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: March 2, 2010
    Assignee: Kermit L. Achterman & Associates, Inc.
    Inventor: Kermit Achterman
  • Patent number: 7658065
    Abstract: A hydraulic energy recovery device for a hydraulic system is disclosed. The hydraulic energy recovery device has a first impeller configured to receive a flow of pressurized liquid, and a second impeller configured to pressurize a flow of liquid. The hydraulic energy recovery device also has a common shaft connecting the first and second impellers.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: February 9, 2010
    Assignee: Caterpillar Inc.
    Inventors: David P. Smith, Igor Strashny, Daniel T. Mather
  • Publication number: 20090236169
    Abstract: The working vehicle includes an axle unit that has a differential gear device, an axle case, an axle input shaft and first and second main output shafts, and an HST unit that has a hydraulic pump main body, a hydraulic motor main body, a capacity adjustment mechanism, an HST case, a pump shaft and a motor shaft, an HST input shaft, and an HST output shaft, wherein the axle unit is directly or indirectly supported by the vehicle frame so as to be positioned close to a first main driving wheel in a state where the axle input shaft extends in a vehicle widthwise direction, wherein the HST unit is directly or indirectly supported by the vehicle frame at a position away from the axle unit in a state where the HST output shaft extends in the vehicle widthwise direction, and wherein the HST output shaft and the axle input shaft are operatively connected to each other through an endless type transmission member.
    Type: Application
    Filed: March 20, 2009
    Publication date: September 24, 2009
    Inventors: Hiroshi SUGIMOTO, Hideki Kanenobu, Koji Iwaki, Kenta Sashikuma
  • Patent number: 7497082
    Abstract: A two piece center section assembly for mounting inside the housing of a hydrostatic or hydraulic drive apparatus is disclosed. The assembly includes separate pump and motor support portions that are preferably generally identical in structure. The need for fasteners between the pump and motor portions is eliminated.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: March 3, 2009
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Michael L. Bennett, Scott W. Keller
  • Patent number: 7493849
    Abstract: A hydraulic cylinder has a pressure chamber delimited on one side by a piston accommodated in a longitudinally displaceable manner in a cylinder housing, on the other side by a housing bottom of the cylinder housing, and radially outwards by a circumferential wall of the cylinder housing, wherein the pressure chamber can be acted upon by a pressure medium via a pressure connection provided at the housing bottom in order to displace the piston in the cylinder housing. An insertion part is inserted in the pressure connection and has a channel section which communicates with the pressure connection and, in the installed position of the hydraulic cylinder, extends essentially in the vertical direction and opens into the pressure chamber in the vicinity of the circumferential wall of the cylinder housing. As a result, a hydraulic cylinder is provided which is compact and is designed in a simple manner, and which can be deaerated in a simpler manner compared to the prior art.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: February 24, 2009
    Assignee: FTE automotive GmbH
    Inventors: Egid Macht, Hubert Derra, Jürgen Ryba, Dieter Grimmer
  • Patent number: 7412829
    Abstract: A hydraulic apparatus such as a bleeder screw comprises an inner end, an outer end, and a main body extending between the inner end and the outer end. The main body includes a first section having a threaded outer peripheral surface a second section disposed between the first section and the inner end. The second section has a smaller diameter than the threaded outer peripheral surface of the first section, and an axial length of the threaded outer peripheral surface is less than an axial length of the second section. An internal fluid passage opens through an outer peripheral surface of the second section at a location between the inner end and the threaded outer peripheral surface, and the internal fluid passage opens through the main body at a location between the threaded outer peripheral surface and the outer end.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: August 19, 2008
    Assignee: Shimano, Inc.
    Inventors: Tatsuya Matsushita, Osamu Kariyama, Shinichi Takizawa, Toshiyuki Ueda, Kenichi Kikuno
  • Publication number: 20080173362
    Abstract: A hydraulic fluid reservoir assembly is disclosed. The reservoir assembly includes a reservoir housing defining a fluid chamber and a baffle member. The baffle member is disposed within the fluid chamber above the inlet and defines a central opening disposed radially inwardly of the reservoir housing. The central opening provides fluid communication between an inlet zone below the baffle and an upper zone above the baffle. The hydraulic fluid introduced through the inlet is directed to flow circumferentially along a radially outer section of the inlet zone whereby air entrained in the hydraulic fluid collects in a central portion of the inlet zone and is communicated to the upper zone thereby deaerating the fluid. A means for forming a substantially fluid tight seal between the reservoir housing and the baffle member is provided along an outer radial edge of the baffle member. A method of manufacture is also disclosed.
    Type: Application
    Filed: January 19, 2007
    Publication date: July 24, 2008
    Inventors: Albert C. Wong, Johnny M. Paris, Rodney M. Sanderson
  • Patent number: 7343740
    Abstract: A filter-integrated orifice element is provided which can reduce manufacturing costs and assembling costs in a hydraulic circuit for which size reduction is desirable. A filter-integrated orifice element is obtained by integrating a filter for removing an obstacle which could block an orifice with an orifice member. The filter-integrated orifice element may be used in a slow return valve in a hydraulic circuit.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: March 18, 2008
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Yoshitake Sakai, Osamu Sato
  • Patent number: 7255730
    Abstract: A fluid deceleration device is provided for a hydraulic system having a housing forming a sump, and a valve unit having an outlet port through which hydraulic fluid is expelled for communication to the sump. The fluid deceleration device includes an elongated tilted fluid container and a conduit which communicates fluid from the outlet port to an interior of the container. The container has an upper open end surrounded by a lip. When the container is filled, de-aerated fluid spills over the lip and falls into the sump.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: August 14, 2007
    Assignee: Deere & Company
    Inventor: Gaylen Eugene Hicok
  • Patent number: 7232518
    Abstract: A filter device includes at least one filter unit (10), connectable to a hydraulic circuit (14), with at least one supply line (16), one discharge line (18), and at least one cooling unit (22). The cooling unit is connected to a secondary branch line (20), is connected to the hydraulic unit (14) parallel to the supply line (16), and is supplied with a hydraulic medium by a switching device (24) once a predetermined temperature threshold value of the hydraulic medium to be cooled is attained. A permanent supply (36) for the cooling unit (22) is provided in the direction of flow of the hydraulic medium in the supply line (18) before the switching device (24). This permanent supply (36), connected in parallel to the switching device (24), flows into the secondary branch line (20) to control the volume flow in reverse flow according to the fluid temperature.
    Type: Grant
    Filed: October 6, 2001
    Date of Patent: June 19, 2007
    Assignee: Hydac Filtertechnik GmbH
    Inventor: Werner Wilkendorf
  • Patent number: 7225719
    Abstract: A distributing valve for a speed governor of a turbine is provided, the distributing valve having a structure to reliably vent air therefrom. The distributing valve is disposed such that the direction of movement of a plunger is horizontal, with air vent valves being provided at the highest portion of each of ports of the distributing valve, to facilitate reliable venting of air out of a pressure oil system. Also provided is a structure of the distributing valve to facilitate machining or assembly of the distributing valve.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: June 5, 2007
    Assignee: Hitachi, Ltd.
    Inventor: Hideaki Imai
  • Patent number: 7100372
    Abstract: The present invention provides a vehicle air compressor device which includes a motor device serving as a driving power source, and a drier device that conducts compressed air; the drier device arranged opposite to the motor device; and a supporting member for supporting the air compressor device on a vehicle at a portion where the motor device and the drier device are adjacent to each other.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: September 5, 2006
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Morito Ohshita, Masakazu Ohashi
  • Patent number: 7082758
    Abstract: In a hydraulic machine, hydraulic pump failure is detected and the pump lifespan is estimated before the pump failure occurs. The discharge pressure 122, oil temperature 126, and drain filter differential pressure 120 are measured, a correlative relationship 128 between the filter differential pressure and the discharge pressure is determined, and a representative filter differential pressure 130 is calculated from this correlative relationship. Using an oil temperature-differential pressure correlation function, the representative differential pressure value 130 is corrected so that the variable component 132 caused by the oil temperature 126 is eliminated therefrom. The long-term trend and the short-term trend of the increase over time of the corrected differential pressure is calculated. A pump failure is predicted or the pump lifespan is estimated based on the degree of deviation between the long-term trend and the short-term trend.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: August 1, 2006
    Assignee: Komatsu, Ltd.
    Inventors: Masato Kageyama, Yukio Shoji, Nobumi Yoshida
  • Patent number: 7013642
    Abstract: The present invention provides a clutch bleeder tool assembly to force air bubbles from a clutch hydraulic control assembly of a standard vehicle transmission. The clutch bleeder tool assembly includes an adaptor cap to replace the factory cap on the hydraulic fluid reservoir of the clutch assembly. The adaptor cap has a hose attached at one end to the adaptor cap. The other end of the hose is attached to a bulb pump having a check valve. When the bulb pump is operated a positive pressure is maintained in the fluid reservoir. The hydraulically closed clutch hydraulic control assembly is opened at the slave cylinder to allow air bubbles to be forced out, so that proper operation of the clutch hydraulic control assembly is maintained when the hydraulic fluid reservoir is filled and the factory cap is reinstalled.
    Type: Grant
    Filed: June 21, 2004
    Date of Patent: March 21, 2006
    Inventor: Frederick Riley Smith
  • Patent number: 6964162
    Abstract: A hydraulic pressure generating apparatus includes a hydraulic oil feed line for feeding hydraulic oil with high pressure from an oil tank to a hydraulic pressure control system of a generator by an oil feeding pump unit, a hydraulic oil return line for returning drain oil from the hydraulic pressure control system to the oil tank, and a circulation line for circulating and purifying the hydraulic oil of the oil tank by a circulating pump unit. In such apparatus, the hydraulic oil is flame resistant hydraulic oil which is hardly deteriorated by direct heating, and the flame resistant hydraulic oil is heated by a heater disposed in the oil tank.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: November 15, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Makoto Takahashi, Osamu Shindo, Atsushi Narabe
  • Patent number: 6913040
    Abstract: A hydraulic fluid reservoir apparatus for an automotive power steering system comprises a filter chamber, and a filter parallel to a vertical axis and dividing the filter chamber into an upstream region and a downstream region. The reservoir apparatus also includes a stagnant fluid well apart from the filter chamber, and a de-aeration zone overlying the filter chamber. A vent is provided between the upstream region and the de-aeration zone. Fluid recycled to the reservoir apparatus contains entrained gas. The filter separates the gas from the fluid within the upstream region, whereupon the gas is vented to the de-aeration zone and separates from the fluid circulated to the stagnant fluid well.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: July 5, 2005
    Assignee: Visteon Global Technologies, Inc.
    Inventors: John Crossman, Neil Lauer, Stuart Dale Barter