Having Distinct Cooling Or Lubricating Structure Patents (Class 60/456)
  • Patent number: 11054198
    Abstract: A cooling apparatus for a hydrostatic transmission includes a cooling body to be coupled with a hydrostatic transmission, a sidewall member protruding from the cooling body to surround a cooling flow path which cools a working fluid supplied from the hydrostatic transmission and discharges the working fluid into the hydrostatic transmission or a storage tank, an installing member protruding from the cooling body at a position spaced apart from the sidewall member to be disposed inside the sidewall member, a detour member connected to the installing member and protruding from the cooling body to extend in a first axial direction to allow the working fluid, which flows along the cooling flow path, to make a detour, and a plurality of protruding members protruding from the cooling body to be spaced apart from each of the sidewall member, the installing member, and the detour member in the cooling flow path.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: July 6, 2021
    Assignee: LS MTRON LTD.
    Inventors: Jong Rak Choi, Jai Yoon Shin, Young Gil Park, Cheung Hyun Nam, Nam Hyung Chung, Shin Hwa Choi
  • Patent number: 10969009
    Abstract: The present invention relates to an oil cooling apparatus for hydrostatic transmissions that includes a cooling main body coupled to a transmission case; an accommodating groove formed in the cooling main body to accommodate oil; a cover unit coupled to the cooling main body to cover the accommodating groove; a supply port configured to supply the oil to the accommodating groove; a discharge port configured to discharge the oil from the accommodating groove; a separating unit coupled to the cooling main body and configured to separate a flow path formed in the accommodating groove into a supply flow path connected to the supply port and a discharge flow path connected to the discharge port; and a hurdle unit coupled to each of an outer wall of the cooling main body and the separating unit, wherein the hurdle units may be formed to protrude from a bottom surface of the cooling main body so that an area of a flow region through which the oil passes is decreased.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: April 6, 2021
    Assignee: LS MTRON LTD.
    Inventors: Jai Yoon Shin, Jong Rak Choi
  • Patent number: 10823159
    Abstract: A method for high fluid shear processing of a fluid uses an isolator that has a first sub-chamber for containing a first fluid and a second sub-chamber for containing a second fluid defined by a separator positioned in the chamber and movable between a first end of the chamber and a second end of the chamber. The two sub-chambers are in pressure communication with each other but are not in fluid communication with each other. A first fluid is pumped at an ultrahigh pressure into the first-sub chamber, and the pressure in the first sub-chamber causes a second fluid to be processed to be discharged from the second sub-chamber into a processing valve. A system is also provided for performing the steps of this method.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: November 3, 2020
    Assignee: PRESSURE BIOSCIENCES, INC.
    Inventor: Edmund Y. Ting
  • Patent number: 10704232
    Abstract: A hydraulic system for a working machine includes an fluid cooler including an input port and an output port, the fluid cooler being configured to cool an operation fluid, an outputting portion to output the operation fluid, a traveling hydraulic device to be activated by the operation fluid, an operating hydraulic device to be activated by the operation fluid, a first output fluid tube connecting the operating hydraulic device to a tank, a second output fluid tube branching from the first output fluid tube and being connected to the input port of the fluid cooler, a third output fluid tube connecting the outputting portion to the output port of the fluid cooler, a fourth output fluid tube connected to the traveling hydraulic device, the fourth output fluid tube being connected to the second output fluid tube, and a first check valve disposed on the fourth output fluid tube.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: July 7, 2020
    Assignee: KUBOTA CORPORATION
    Inventors: Yuji Fukuda, Keigo Honda, Hiroaki Nakagawa, Daisuke Sakurai, Toshiya Tani, Taisuke Shinohara, Yoshihiro Ebata
  • Patent number: 10612532
    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: February 27, 2017
    Date of Patent: April 7, 2020
    Assignee: Vaculift, Inc.
    Inventors: William J. Solomon, Darrell Hocutt
  • Patent number: 10221936
    Abstract: An external cooling circuit for an integrated transaxle includes an integrated transaxle having a casing and a motor and a pump contained within the casing. The pump is connected to and actuable by an input shaft extending from the casing. The motor is connected to an output shaft extending from the casing. Hydraulic fluid is circulated in the casing by the pump to drive the motor. First and second ports are formed in the casing and a charge pump is contained within the casing. A reservoir is external to the casing. The reservoir is in fluid communication with the first and second ports of the casing such that the charge pump is configured to create a vacuum at the second port to cause hydraulic fluid to exit the casing through the first port, enter the reservoir, and re-enter the casing through the second port.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: March 5, 2019
    Assignee: Schiller Grounds Care, Inc.
    Inventors: Jonathan Lapp, Mark J. Wegner
  • Patent number: 9945101
    Abstract: A work vehicle includes a drive unit, a fan motor, a fan configured to be driven by the fan motor, an overrun state detecting unit configured to detect an overrun state of the drive unit, and a control unit. The control unit is configured to control a rotational speed of the fan to reach a first fan rotational speed by increasing the rotational speed of the fan when a detection value detected by the overrun state detecting unit becomes greater than or equal to a first threshold. The control unit is configured to control the rotational speed of the fan to reach a second fan rotational speed higher than the first fan rotational speed when the detection value becomes greater than or equal to a second threshold greater than the first threshold.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: April 17, 2018
    Assignee: KOMATSU LTD.
    Inventors: Yoshiaki Hino, Kazuyuki Kirino, Tomoyuki Iwasawa
  • Patent number: 9719587
    Abstract: A hydraulic axle includes a reversible hydraulic pump. The hydraulic axle has a multi-surface cylinder with two retraction surfaces and two deployment surfaces. A first deployment surface and a first retraction surface are configured to interconnect with each other and separate from other surface during a rapid-traverse stroke. A pressure medium is configured to act on the second deployment surface to enable deployment.
    Type: Grant
    Filed: December 20, 2014
    Date of Patent: August 1, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Stefan Schmidt, Gottfried Hendrix
  • Patent number: 9695841
    Abstract: In a hydraulic closed circuit system with hydraulic pumps which maintains a well-balanced flow rate by automatically controlling the flow rate, a first hydraulic pump is connected to a hydraulic cylinder device such that the hydraulic closed circuit is made, a second hydraulic pump is connected at one of paired delivery ports to a bottom side of the hydraulic cylinder device and at the other of the ports to a tank, and a prime mover drives the first and second hydraulic pumps and recovers motive power from these pumps. A pump capacity control unit detects a moving direction of the hydraulic cylinder device, and a pressure in a lower-thrust side of the device, and controls a capacity of the second hydraulic pump so that the flow rate during the extension/retraction of the hydraulic cylinder device becomes balanced between the first and second hydraulic pumps and the hydraulic cylinder device.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: July 4, 2017
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Tsutomu Udagawa, Hiroaki Tanaka
  • Patent number: 9695843
    Abstract: A hydraulic load-sensing control arrangement for a first and second hydraulic consumer has a variable displacement pump having load-sensing regulation, to which the highest respective load-sensing pressure of consumers is reported. The first consumer has the highest load pressure in normal operation and therefore the highest load-sensing pressure dependent on the load pressure. A pressure reducing valve is arranged in the pressure medium flow path between the variable displacement pump and the first consumer. A spring force from a regulating spring and a regulating pressure dependent on the load pressure of the first consumer are applied in the opening direction of a valve gate in this pressure reducing valve and pressure is applied directly downstream from the pressure reducing valve in the closing direction thereof. A pressure equivalent of the spring force of the regulating spring and the regulating pressure are greater than a pressure of the variable displacement pump.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: July 4, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Peter Buettner, Robert Rueppel, Timo Ikonen
  • Patent number: 9670942
    Abstract: A separate hydraulic power pack for providing at least one user with an oil flow. The hydraulic unit includes a motor, a hydraulic pump driven by the motor, a tank, an oil inlet, an oil outlet, a heat exchanger, and a first conduit system for oil. The first conduit system connects at least the oil inlet, the heat exchanger, the oil tank, the hydraulic pump and the oil outlet. The heat exchanger is provided for liquid cooling of the oil. A cooling liquid inlet for connection to a cooling liquid source, a first cooling liquid outlet and a second conduit system for a cooling liquid.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: June 6, 2017
    Assignee: CONSTRUCTION TOOLS PC AB
    Inventors: Magnus Karlsson, Torkel Danielsson
  • Patent number: 9580887
    Abstract: The present disclosure provides a method for controlling a cooling fan-brake of construction equipment, including: generating a brake charging signal of a brake unit; charging hydraulic oil with a high flow rate in the brake unit and completing the charging of hydraulic oil; turning a loading valve of a cooling fan unit off and turning an unloading valve of the cooling fan unit on when the hydraulic oil is charged; and turning the loading valve of the cooling fan unit on and turning the unloading valve of the cooling fan unit off after the charging of hydraulic oil is completed and a predetermined time elapses.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: February 28, 2017
    Assignee: Doosan Infracore Co., Ltd.
    Inventor: In Pyo Jang
  • Patent number: 9360005
    Abstract: An auxiliary device for an agricultural working machine includes a hydraulic pump unit designed to pump a hydraulic fluid at a predetermined working pressure; a drive unit connected to the hydraulic pump unit that drives the hydraulic pump unit at the working pressure; a hydraulic drive having a drive-fluid inlet connected to a pump-fluid outlet of the hydraulic pump unit via a pressure line (P1, P2) and a drive-fluid outlet connected to a pump-fluid inlet via a supply line (S); and a fluid exchange device having a fluid supply line connected to the supply line (S) for a controlled supply of the hydraulic fluid from a hydraulic circuit of the working machine and a fluid discharge line connected to the supply line (S) upstream of the fluid supply line for the controlled discharge of the hydraulic fluid from the supply line (S) into the hydraulic circuit.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: June 7, 2016
    Assignee: CLAAS SAULGAU GMBH
    Inventors: Thomas Fedde, Matthias Zimmermann
  • Patent number: 9328748
    Abstract: A hydraulic excavator is provided which can allow the cooling device to be arranged in proximity to a rear wall of a cab. The rear wall of the cab has an upright wall part extending in the vertical direction and an inclined wall part inclined to the rear upper side with respect to the upright wall part. The outer surface of an oil cooler has a front surface facing the upright wall part and extending in the vertical direction and an inclined surface inclined to the rear upper side with respect to the front surface. The upper edge of the front surface is arranged below the height position of the other edge of the inclined wall part. An angle formed by the upright wall part and the inclined wall part is more than or equal to an angle formed by the front surface and the inclined surface.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: May 3, 2016
    Assignee: KOMATSU LTD.
    Inventor: Hironori Yotsuzuka
  • Patent number: 9127697
    Abstract: A hydraulic pressure control system having a variable displacement pump fluidly connected to a hydraulic motor. The pump provides flow to a first circuit upon demand. Remaining flow is provided to a second circuit. The second circuit includes a pilot controlled pressure reducing valve that adjusts the pumps outlet pressure based upon a sensed loads taken from a conduit between the pressure control valve and an active flow regulator valve.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: September 8, 2015
    Assignee: SAUER-DANFOSS INC.
    Inventors: Charles D. Throckmorton, Stephen D. Cromer, Glenn M. Mahony, Michael J. Stoltenow, Chad J. Daniel
  • Patent number: 9103096
    Abstract: A control unit for controlling a flow rate control valve includes a first computing unit for determining an energy component that heats hydraulic oil, a first setting unit for setting a second relationship between a flow rate through an oil cooler and the energy component based on an experimentally or empirically known, first relationship between flow rate through the oil cooler and an amount of oil cooler heat radiation as derived by replacing the amount of oil cooler heat radiation in the first relationship to the energy component, and a second computing unit for determining the flow rate through the oil cooler based on the energy component determined by the first computing unit and the second relationship. The control unit controls the flow rate control valve according to the flow rate determined by the second computing unit.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: August 11, 2015
    Assignee: Hitachi Construction Manchinery Co., Ltd.
    Inventor: Satomi Kondo
  • Patent number: 9021796
    Abstract: A pipelayer includes a pilot pressure control unit. The pilot pressure control unit supplies hydraulic fluid to a pilot port of a warm-up control valve so that the warm-up control valve enters an open state when a winch control valve is in the closed state. The pilot pressure control unit drains hydraulic fluid from the pilot port of the warm-up control valve so that the warm-up control valve enters the closed state when the winch control valve is in the open state. The stroke amount from the stroke end of the closed side of the spool of the warm-up control valve when the meter-out opening of the warm-up control valve is fully closed is larger than the stroke amount from the stroke end of the closed side of the spool of the winch control valve when the meter-in opening of the winch control valve is fully closed.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: May 5, 2015
    Assignee: Komatsu Ltd.
    Inventors: Takuya Uemura, Yasuhiko Takeuchi
  • Publication number: 20150096288
    Abstract: A thermal management system is provided. The thermal management system includes a first hydraulic system for circulating a first hydraulic fluid at a first temperature, a second hydraulic system for circulating a second hydraulic fluid at a second temperature that is higher than the first temperature, and a heat exchanger coupling the first hydraulic system to the second hydraulic system, wherein the heat exchanger is configured to exchange heat between the first hydraulic fluid and the second hydraulic fluid.
    Type: Application
    Filed: July 9, 2013
    Publication date: April 9, 2015
    Inventor: Jianmin Liao
  • Patent number: 8997476
    Abstract: A machine includes a hydraulic cylinder configured to raise and lower a boom of the machine, and an accumulator selectively fluidly connected to the hydraulic cylinder. The accumulator is configured to receive fluid from the hydraulic cylinder during lowering of the boom. The machine also includes a hydraulic motor fluidly connected to the accumulator via an independent metering valve. The machine further includes a fan driven by the hydraulic motor and configured to assist in cooling fluid displaced from the hydraulic cylinder.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: April 7, 2015
    Assignee: Caterpillar Inc.
    Inventors: Jason Lee Brinkman, Wesley Thomas Payne, Aristoteles Rosa Neto
  • Patent number: 8997471
    Abstract: A hydraulic system for a machine is disclosed. The hydraulic system may include a fluid tank, a first manifold, a valve body, a second manifold, and a plurality of conduits. The first manifold may be operatively attached to the fluid tank and have at least two inlets and at least one outlet in fluid communication with the fluid tank. The number of the at least one outlet may be less than the number of the at least two inlets. The second manifold may be operatively attached to the valve body and have at least one inlet in fluid communication with the valve body and at least two outlets. The number of the at least one inlet may be less than the number of the at least two outlets. The plurality of conduits may fluidly connect the at least two inlets of the first manifold and the at least two outlets of the second manifold.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: April 7, 2015
    Assignee: Caterpillar Inc.
    Inventors: Jason Brinkman, Shaun Currier, Eric Jakubiak
  • Patent number: 8984872
    Abstract: A method for estimating a fluid charge of a hydraulic accumulator includes determining a first accumulator pressure at a first time with a pressure sensor, the first time during accumulator charging; determining a second accumulator pressure at a second time with the pressure sensor, the second time during accumulator charging; determining a first fan speed at the first time; determining a second fan speed at the second time; and estimating the fluid charge of the hydraulic accumulator as a function of the first accumulator pressure, the second accumulator pressure, the first fan speed, and the second fan speed.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: March 24, 2015
    Assignee: Caterpillar Inc.
    Inventors: Bryan E. Nelson, Jeremy T. Peterson, Jeffrey L. Kuehn
  • 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: 8955316
    Abstract: In a drive train device, in particular a motor vehicle drive train device, with a working fluid pressure system for providing an operating fluid pressure including at least a first and a second operating fluid pressure source connected in at least one operating state directly to the working fluid pressure system, and a lubricating and cooling fluid pressure system with an operating fluid pressure deviating from the operating fluid pressure in the working fluid pressure system, a hydraulic switching unit is provided which in at least one operating state connects the second operating fluid pressure source directly to the lubricating and cooling fluid pressure system for increasing the pressure thereof.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: February 17, 2015
    Assignee: Daimler AG
    Inventors: Michael Baraga, Gerd Jäggle, Steffen Henzler
  • Publication number: 20150033729
    Abstract: A flow control assembly for controlling cooling flow of a turbine engine is provided. The flow control assembly includes a first flow control device having a first sidewall and a second sidewall. The first sidewall is coupled to a compressor vane and is configured to define a first flow path from a compressor to a turbine vane. The second sidewall is coupled to a compressor vane and is configured to define a second flow path from the compressor to a turbine blade. A second flow control device is coupled to the compressor and includes an orifice device coupled to the compressor vane and a meter device coupled to the orifice, wherein the orifice is configured to direct a cooling flow to the meter device. A controller is configured to control the meter device to facilitate regulating the cooling flow into at least one of the first flow path and the second flow path.
    Type: Application
    Filed: July 31, 2013
    Publication date: February 5, 2015
    Applicant: General Electric Company
    Inventors: Corey Bourassa, William Dwight Gerstler, Bruce Philip Biederman
  • Publication number: 20150033730
    Abstract: A component of an air cycle machine includes a fan housing portion, a compressor housing portion, a main bore housing radius, a static seal radius, a shroud pilot housing radius, and an insulator seal plate housing radius. The fan housing portion includes a shroud for a fan section. The compressor housing portion includes a shroud for a compressor air inlet, a shroud portion for a compressor blade section, and a shroud portion for a compressor air outlet. The main bore housing radius is arranged about a central axis and is configured to circumscribe a shaft arranged along the central axis, the main bore housing radius being between 1.9400 and 1.9440 inches. The static seal portion is arranged about the central axis and positioned longitudinally adjacent to the main bore housing portion. The static seal portion is configured to circumscribe a static seal defined by the shaft, and has a radius between 2.0420 and 2.0440 inches. The shroud pilot housing radius is arranged about the central axis.
    Type: Application
    Filed: August 2, 2013
    Publication date: February 5, 2015
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Craig M. Beers, Brent J. Merritt
  • Publication number: 20150013321
    Abstract: A separate hydraulic power pack for providing at least one user with an oil flow. The hydraulic unit includes a motor, a hydraulic pump driven by the motor, a tank, an oil inlet, an oil outlet, a heat exchanger, and a first conduit system for oil. The first conduit system connects at least the oil inlet, the heat exchanger, the oil tank, the hydraulic pump and the oil outlet. The heat exchanger is provided for liquid cooling of the oil. A cooling liquid inlet for connection to a cooling liquid source, a first cooling liquid outlet and a second conduit system for a cooling liquid.
    Type: Application
    Filed: February 11, 2013
    Publication date: January 15, 2015
    Applicant: CONSTRUCTION TOOLS PC AB
    Inventors: Magnus Karlsson, Torkel Danielsson
  • Patent number: 8915076
    Abstract: A system for providing pressurized hydraulic fluid includes an engine driven main pump and an electrical motor driven auxiliary pump. The auxiliary pump provides hydraulic fluid at line pressure to shift control subsystems during a vehicle launch while the main pump provides hydraulic fluid to cooler or lubrication subsystems during the vehicle launch. A pressure regulation valve regulates the pressure of the hydraulic fluid from the main pump. Once the main pump reaches a critical speed, the main pump provides hydraulic fluid at line pressure to the hydraulic control system and the auxiliary pump is turned off.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: December 23, 2014
    Assignee: GM Global Technology Operations, LLC
    Inventors: Zhe Xie, Hong Yang, Anthony L. Smith, James M. Hart, Steven P. Moorman
  • Patent number: 8910473
    Abstract: A warm-up pilot pressure control unit adjusts pilot pressure inputted to a first flow channel open/close unit so that the flow channel open/close unit is switched to an open state when a warm-up start state is entered under the necessary condition that a first winch operation member is in a neutral position. When the first flow channel open/close unit is in the open state, a first pump displacement adjustment unit adjusts the displacement of a first hydraulic pump so that the differential pressure between a first pump hydraulic circuit and a first warm-up hydraulic circuit becomes constant at a predetermined set pressure.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: December 16, 2014
    Assignee: Komatsu Ltd.
    Inventors: Takuya Uemura, Yasuhiko Takeuchi, Takashi Noda
  • Patent number: 8876495
    Abstract: Example fluid circuits (e.g., within aircrafts) include first and second pump assemblies. The first pump assembly has an electric motor and a first fluid pump. The first fluid pump is coupled to the electric motor and has a case drain port that is in fluid communication with a case drain region of the first fluid pump. The second pump assembly is powered by hydraulic pressure from the first fluid outlet of the first fluid pump and functions to augment flow through the case drain region of the first fluid pump.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: November 4, 2014
    Assignee: Eaton Corporation
    Inventors: Phillip Wayne Galloway, Jeffrey David Skinner, Kelly Dale Valtr
  • Patent number: 8857188
    Abstract: A hybrid drive device including an electric motor; an automatic transmission; a lubricating oil passage to which a lubricating oil pressure is supplied; and a switching valve that is switched between a first state where the lubricating oil passage communicates with a first lubricating oil passage that guides lubricating oil to the automatic transmission, and a second state where the lubricating oil passage communicates with a second lubricating oil passage that guides the lubricating oil to the electric motor. The electric motor and an internal combustion engine output shaft are operable in conjunction with the automatic transmission. The switching valve is switched from the first state to the second state when a vehicle is in a stationary state or running at a speed of a predetermined value or less including the stationary state of the vehicle.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: October 14, 2014
    Assignee: Aisin AW Co., Ltd.
    Inventors: Kazuyuki Noda, Masashi Kito, Yuichi Seki, Satoru Kasuya
  • Patent number: 8857170
    Abstract: A Gas Pressure Reduction Generator (GPRG) System and a method for implementing a GPRG System is provided, where the GPRG System includes a gas inlet configured to receive a pressurized gas flow from a gas supply, at least one expander in flow communication with the gas inlet to receive the pressurized gas flow, wherein the expander is operable to convert the pressurized gas flow into mechanical energy and a depressurized gas flow and a generator associated with the expander, wherein the generator is configured to convert the mechanical energy into electrical energy.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: October 14, 2014
    Assignee: ElectraTherm, Inc.
    Inventors: Andrew Oxner, Richard K. Langson
  • Patent number: 8844278
    Abstract: The disclosure describes, in one aspect, a control system for charging an electro-hydraulic charging system. The control system including at least one sensor operatively coupled to an engine for sensing at least one engine parameter indicative of an operating status of the engine and a controller adapted to charge the charging system when the operating status of the engine is determined to be stable.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: September 30, 2014
    Assignee: Caterpillar Inc.
    Inventors: Ethan M. Tevis, Maureen E. Beck, Shawn I. Cullen
  • Patent number: 8844279
    Abstract: A hydraulic fan circuit includes a primary pump, a motor fluidly connected to the primary pump, and a fan operably connected to and driven by the motor. The circuit also includes a supply passage extending from the primary pump to the motor, a return passage extending from the motor to the primary pump, and a pressure limiting valve configured to selectively reduce pressure of a flow of pilot fluid directed to the primary pump. The circuit further includes an override valve configured to selectively connect the supply passage to the pressure limiting valve.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: September 30, 2014
    Assignee: Caterpillar Inc.
    Inventors: Bryan E. Nelson, Jeremy T. Peterson
  • Publication number: 20140260234
    Abstract: An oil-hydraulic unit includes a power module generating heat when energized. The power module is provided on the bottom surface of a recess facing hydraulic oil in a tank. Thus, the power module is cooled by the hydraulic oil in the tank. This reduces the difference in temperature between the power module and the hydraulic oil in the tank. In the oil-hydraulic unit, the temperature sensor detects the temperature of the power module. The oil temperature in the tank is estimated based on the temperature detected by the temperature sensor.
    Type: Application
    Filed: September 24, 2012
    Publication date: September 18, 2014
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventor: Tetsuo Nakata
  • Publication number: 20140245731
    Abstract: A spool valve that has a hollow portion formed with an input port, a first output port, and a second output port, and a spool capable of sliding within the hollow portion and having a plurality of lands, the spool valve being configured to distribute output for input to the input port to the first output port and the second output port in accordance with a proportion of distribution that matches a position of the spool. An opening of the second output port is formed in such a shape that a width of the opening becomes gradually smaller in a direction of movement of the spool in which distribution of the output to the first output port is increased.
    Type: Application
    Filed: December 20, 2012
    Publication date: September 4, 2014
    Applicant: AISIN AW CO., LTD.
    Inventors: Hiroyuki Kutsubo, Kazuki Kojima, Tetsuya Shimizu, Kenichi Tsuchida, Kazunori Ishikawa, Tomomi Ishikawa
  • Patent number: 8793989
    Abstract: A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: August 5, 2014
    Assignee: Lightsail Energy, Inc.
    Inventors: Danielle A. Fong, Stephen E. Crane, Edwin P. Berlin, Jr.
  • Patent number: 8783027
    Abstract: A pressure regulation circuit delivers pressurized fluid into a generator. The circuit includes pressure regulator structure and a primary valve. The pressure regulator structure outputs pressurized fluid at a predetermined output pressure that is greater than a desired operating pressure of the generator and less than a predetermined upper alarm pressure. The primary valve is downstream from the pressure regulator structure and is selectively opened and closed by a controller based on the pressure within the generator. The controller opens the primary valve to allow the pressurized fluid outputted from the pressure regulator structure to flow into the generator upon the pressure within the generator being at or below a predetermined lower limit. The controller closes the primary valve to prevent the pressurized fluid outputted from the pressure regulator structure from flowing into the generator upon the pressure within the generator being at or above a predetermined upper limit.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: July 22, 2014
    Assignee: Siemens Energy, Inc.
    Inventor: Owen R. Snuttjer
  • Publication number: 20140196447
    Abstract: The CVT 1 includes a part to be lubricated and a hydraulic control part for controlling transmission. The hydraulic circuit for transmissions includes a first hydraulic oil pathway for supplying oil from the pump apparatus to the hydraulic control part, and a second lubricating oil pathway for supplying oil containing an air bubble to the part to be lubricated. The pump apparatus includes a multi-stage trochoid pump and has an air bubble-containing oil discharging part for discharging the oil containing an air bubble to the first stage trochoid pump part. The air bubble-containing oil discharging part is connected to the second lubricating oil pathway. The second stage trochoid pump part increases pressure of the oil discharged from the first stage trochoid pump part, and discharges it from the high-pressure oil discharging part. The first hydraulic oil pathway is connected to the high-pressure oil discharging part.
    Type: Application
    Filed: July 17, 2012
    Publication date: July 17, 2014
    Applicant: MIKUNI CORPORATION
    Inventor: Norio Takehana
  • Patent number: 8745983
    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. An auxiliary hydraulic circuit is between the pair of integrated hydrostatic transmissions. The system pumps hydraulic fluid from one of the integrated hydrostatic transmission to the auxiliary hydraulic circuit, and the return line from the auxiliary hydraulic circuit may be connected to the other integrated hydrostatic transmission.
    Type: Grant
    Filed: January 6, 2010
    Date of Patent: June 10, 2014
    Assignee: Deere & Company
    Inventor: James E. Hardzinski
  • Patent number: 8739522
    Abstract: Systems and methods provide for capturing heat energy in a power generation system. The system includes: a first compressor configured to exhaust a first compressed, heated air flow; a heat exchanger connected to the first compressor and configured to receive the first compressed, heated air flow and configured to transfer heat energy from the first compressed, heated air flow to an oil; at least one pump connected to the heat exchanger and configured to pump the heated oil in a closed-loop system from the heat exchanger to an insulated storage tank; a second compressor connected to the heat exchanger and configured to exhaust a second compressed, heated air flow; and an energy storage unit connected to the second compressor and configured to store heat energy from the second compressed, heated air flow.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: June 3, 2014
    Assignee: Nuovo Pignone S.p.A.
    Inventors: Sanjay Anikhindi, Bhaskara Kosamana
  • Patent number: 8720197
    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: Grant
    Filed: February 11, 2009
    Date of Patent: May 13, 2014
    Assignee: Parker-Hannifin Corporation
    Inventors: Bengt-Goran Persson, Dale Vanderlaan, Lew Kasper
  • Patent number: 8701397
    Abstract: A hydraulic oil supply device includes: a work equipment pump that supplies a hydraulic oil to a hydraulic actuator that drives a work equipment; a fan pump that supplies the hydraulic oil to a hydraulic motor that drives a cooling fan; and a circuit switching valve provided on a hydraulic circuit being branched from a hydraulic circuit connecting the hydraulic actuator with the work equipment pump to be connected to the fan pump, the circuit switching valve selectively connecting a discharge portion of the fan pump to the hydraulic actuator and the hydraulic motor.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: April 22, 2014
    Assignee: Komatsu Ltd.
    Inventors: Satoshi Tanaka, Norihide Mizoguchi
  • Publication number: 20140083092
    Abstract: A hydraulic circuit for construction equipment is provided, which supplements hydraulic fluid of a hydraulic pump for a cooling fan and hydraulic fluid of a main hydraulic pump and uses the supplemented hydraulic fluid as a hydraulic source of a RCV in order to supply signal pressure to a control valve that controls the driving of a hydraulic actuator.
    Type: Application
    Filed: September 2, 2010
    Publication date: March 27, 2014
    Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventors: Young-Jin Son, Jae-Whan Ok
  • Patent number: 8668467
    Abstract: An integrated fluid handling apparatus 10 includes a power take off device 108 having a rotating power take off mechanism 122, a hydraulic pump 104 having a rotating fluid pump mechanism 146, a flow torque tube 106, and an electric motor/generator 102 having a rotating electric power conversion mechanism 173. A rotational power transfer system includes connector devices 128, 138, 166 and 172 that are drivingly connected to and that drivingly connect the mechanisms 122, 146 and 173 in one mode of operation. The electric motor/generator 102 includes heat exchange fluid flow passages that establish a fluid flow path to the inlet of the pump. The mechanisms 122, 146 and 173, and the connector devices 128, 138, 166 and 172 are assembled and used as a whole within a housing, without externally exposed mechanical drive connections and without externally exposed fluid connections, between such mechanisms and devices.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: March 11, 2014
    Assignee: Parker Hannifin Corporation
    Inventors: Robert Bruce Douglas, Dale Vanderlaan, Bruce D. Larkin
  • Patent number: 8647087
    Abstract: A hydraulic motor having a cooling system includes a stator, a rotor that rotates and orbits in the stator, a drive link connected to the rotor, and a housing connected with the stator. The housing includes a working fluid inlet port, a working fluid outlet port, a cooling fluid inlet port, and a cooling fluid outlet port. Each port extends through the housing and is configured to connect with a different associated external fluid line. Pressurized fluid enters the working fluid inlet port to rotate and orbit the rotor en route to the working fluid outlet port. The cooling fluid ports are isolated from the working fluid inlet port and the working fluid outlet port within the housing.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: February 11, 2014
    Assignee: White Drive Products, Inc.
    Inventor: Richard Daigre
  • Patent number: 8646264
    Abstract: The present invention provides a cooling system such as employed in cooling a heat source and a transmission system having said cooling system integrated therewith. The cooling system further includes a pump for supplying hydraulic fluid under pressure to a motor for driving a fan employed in the cooling process. In operation, a controller initiates operation of the pump such as to supply hydraulic fluid to said motor only when needed, thereby to improve the efficiency and controllability of the cooling system.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: February 11, 2014
    Assignee: Artemis Intelligent Power Ltd
    Inventors: William Rampen, Niall Caldwell, Uwe Bernhard Pascall Stein
  • Publication number: 20140026550
    Abstract: A machine includes a hydraulic cylinder configured to raise and lower a boom of the machine, and an accumulator selectively fluidly connected to the hydraulic cylinder. The accumulator is configured to receive fluid from the hydraulic cylinder during lowering of the boom. The machine also includes a hydraulic motor fluidly connected to the accumulator via an independent metering valve. The machine further includes a fan driven by the hydraulic motor and configured to assist in cooling fluid displaced from the hydraulic cylinder.
    Type: Application
    Filed: July 27, 2012
    Publication date: January 30, 2014
    Inventors: Jason Lee Brinkman, Wesley Thomas Payne, Aristoteles Rosa Neto
  • Patent number: 8627656
    Abstract: An oil supply device for a vehicle includes an oil pump driven by a rotation of an internal combustion engine, a hydraulic actuator to which oil is supplied from the oil pump, an engine lubricating system to which the oil is supplied from the oil pump, an oil supply adjusting valve adjusting a supply condition of the oil from the oil pump to the hydraulic actuator and the engine lubricating system, a first oil supply passage supplying the oil from the oil pump to the hydraulic actuator, and a second oil supply passage supplying the oil from the oil pump to the engine lubricating system, wherein the oil supply adjusting valve consistently distributes the oil to the first oil supply passage and the second oil supply passage.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: January 14, 2014
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Eiji Miyachi, Hisashi Ono
  • Patent number: 8601804
    Abstract: A power generating apparatus includes a rotating shaft, a hydraulic pump driven by the rotating shaft, a hydraulic motor driven by operating oil supplied from the hydraulic pump; and a generator coupled to the hydraulic motor. The apparatus further includes an oil line connected to the hydraulic pump and the hydraulic motor for circulating the operating oil between the hydraulic pump and the hydraulic motor, an oil cooler connected to the oil line for cooling the operating oil by heat exchange with a cooling medium, a cooling-medium line supplying the cooling medium to the oil cooler; a bypass line diverging from at least one of the oil line and the cooling-medium line and merging into at least one of the oil line and the cooling-medium line to bypass the oil cooler; and a flow regulating valve in at least one of the oil line and the cooling-medium line.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: December 10, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yu Akashi, Takeshi Matsuo, Shinsuke Sato, Takuro Kameda
  • Patent number: 8567183
    Abstract: Multistage hydraulic systems and methods for converting the potential energy of a pressurized gas, particularly air, into mechanical work when operating in motor, and for producing compressed gas from the mechanical work of the rotating shaft when rotating when operating in compressor mode, by performing a successive expansion/compression of the said gas. Each of the systems comprises: a multistage Compression-Expansion Unit made of several hydraulic Compression-Expansion Modules having different capacity and integrating a gas/liquid separating heat exchanger, designed to convert pressure power into a hydraulic power and vice-versa, by performing an essentially isothermal compression/expansion of the gas; a single stage or multistage, direct or indirect, external forced-air Heat Exchanger for maintaining the active liquid at ambient temperature; and a multi-circuit, multi-displacement Hydraulic Motor/Pump for converting hydraulic power into mechanical power and vice-versa.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: October 29, 2013
    Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)
    Inventors: Sylvain Lemofouet, Alfred Rufer