Plural Paths Having Individual Condition Responsive Control Means Patents (Class 417/302)
  • Patent number: 11697552
    Abstract: A refuse vehicle includes a chassis, an energy storage device, a vehicle body, an electric power take-off system, and a hydraulic component. The energy storage device is supported by the chassis and is configured to provide electrical power to a prime mover. Activation of the prime mover selectively drives the refuse vehicle. The vehicle body is supported by the chassis, and includes an on-board receptacle for storing refuse therein. The electric power take-off system is positioned on the vehicle body, and includes an electric motor configured to drive a hydraulic pump to convert electrical power received from the energy storage device into hydraulic power. An amount of electrical power at least one of received by and provided to the electric motor is limited by a controller to control an output characteristic of the hydraulic pump. The hydraulic component is in fluid communication with the hydraulic pump and configured to operate using hydraulic power from the electric power take-off system.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: July 11, 2023
    Assignee: Oshkosh Corporation
    Inventors: Jeffrey Koga, Emily Davis, Jerrod Kappers, Vince Schad, Robert S. Messina, Christopher K. Yakes, Vincent Hoover, Clinton T. Weckwerth, Zachary L. Klein, John Beck, Brendan Chan, Skylar A. Wachter, Nader Nasr, Chad K. Smith, Logan Gary, Derek A. Wente, Shawn Naglik, Mike J. Bolton, Jacob Wallin, Quincy Wittman, Christopher J. Rukas, Dylan Hess, Jason Rice, Zhenyi Wei, Bashar Amin, Catherine Linsmeier, Joshua D. Rocholl
  • Patent number: 11542966
    Abstract: The invention relates to a compressed-air supply system for operating a pneumatic installation in a pneumatic system of a vehicle, comprising: a compressed-air feed; a compressed-air connection point to the pneumatic installation; a venting connection point to the environment; a pneumatic main line between the compressed-air feed and the compressed-air connection point, which pneumatic main line has an air dryer; a venting valve, which is arranged on the pneumatic main line and is designed as a pilot valve and has a pilot connection point; a compressor having at least one compressor stage; and, in addition to the pneumatic main line, a pilot valve and a pneumatic pilot channel that connects the pilot valve to the pilot connection point of the venting valve.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: January 3, 2023
    Assignee: ZF CV SYSTEMS EUROPE BV
    Inventor: Joerg Meier
  • Patent number: 10863831
    Abstract: The disclosed technology includes a pressure-controlled air mattress for enabling a user to set a desired firmness or pressure level of the air mattress. The pressure-controlled air mattress may automatically maintain the desired pressure by replacing leaked air with air from a pressurized air reservoir.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: December 15, 2020
    Assignee: Polygroup Macau Limited (BVI)
    Inventors: Victor Hugo Ocegueda Gallaga, Jason Loomis
  • Patent number: 10731646
    Abstract: An embodiment provides a vane pump device including a pump unit that includes a high pressure side discharge through-hole which discharges oil, and a low pressure side discharge through-hole which discharges oil; and a housing which accommodates the pump unit, and includes a high pressure side discharge passage that is formed between the high pressure side discharge through-hole and a high pressure side discharge outlet through which oil discharged from the high pressure side discharge through-hole of the pump unit is discharged to the outside, and a cover low pressure side discharge passage and a case low pressure side discharge passage that are formed between the low pressure side discharge through-hole and a low pressure side discharge outlet through which oil is discharged to the outside, and that are shorter than the high pressure side discharge passage.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: August 4, 2020
    Assignee: Showa Corporation
    Inventor: Toshio Nishikawa
  • Patent number: 10451060
    Abstract: A positive displacement pump for pumping oil in a motor vehicle transmission comprises a pump stage that has a central kidney-shaped suction cavity and two kidney-shaped pressure cavities. Oil is selectively pumped via one kidney-shaped pressure cavity or the other kidney-shaped pressure cavity in accordance with the direction of rotation of the pump stage. This makes it possible to create, with little complexity, two operating stages for the positive displacement pump.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: October 22, 2019
    Assignee: Continental Automotive GmbH
    Inventor: Christian Böhm
  • Patent number: 10348073
    Abstract: Aspects of the present disclosure relate to providing cable assemblies for cellular base stations having remote radio head units located atop a radio tower. Each installation requires near-custom cabling, as the electrical resistance of the conductors of the cable assembly varies based on the length of the cable assembly, and because different operators and local governments require different color-coding of the conductors which are coupled to the power trunk. Accordingly, a power distribution system is provided herein wherein conductors of a trunk cable may be coupled to power jumper conductors at transitions. The transitions are generally cylindrical and comprise channels into which splicing lugs are seated. The conductors may be electrically coupled together and secured via set screws. Manufacturing costs may be reduced, as common configurations of trunk cables may be manufactured in higher quantity and coupled to power jumper conductors according to local requirements.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: July 9, 2019
    Assignee: CommScope Technologies LLC
    Inventor: Frank A. Harwath
  • Patent number: 10174948
    Abstract: A combustion staging system for fuel injectors of a multi-stage combustor of a gas turbine engine has pilot and mains fuel manifolds distributing fuel to the injectors. A splitting unit splits a fuel flow and sends portions of the flow to pilot and mains fuel manifolds to perform staging control of the combustor. The splitting unit can deselect the mains manifold so that there is no flow into the combustor from the mains manifold. A cooling flow recirculation line provides a cooling flow of fuel to the mains manifold when that manifold is deselected so that the mains manifold remains primed with relatively cool fuel. A return section collects the cooling flow from the mains manifold. One or more fuel pressure sensors detect pressure of the cooling flow on the recirculation line. A control arrangement closes off the recirculation line when the pressure sensor(s) indicates failure of the cooling flow.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: January 8, 2019
    Assignee: ROLLS-ROYCE PLC
    Inventor: Ralph Hill
  • Patent number: 9994080
    Abstract: An air supply system on a vehicle for inflating and deflating a tire. The system includes a compressor connected to a drier having drying material to extract water from the air and a deflation line connectable between the tire and the dryer. The air dryer is operable in a first mode in which air passing through the dryer in a first direction is dried by the dryer and a second regeneration mode in which air passes through the dryer in a direction opposite to the first to remove water collected by the dryer, characterized in that the air used for the regeneration is air deflated from the tire.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: June 12, 2018
    Assignee: AGCO International GmbH
    Inventor: Bernhard Hoeldrich
  • Patent number: 9826842
    Abstract: Disclosed herein is a cushioning device that includes a plurality of fluid cells each containing fluid for supporting a load. The cushioning device further includes a manifold system interconnecting the plurality of fluid cells, a first reservoir, and a second reservoir connected to the first reservoir in series. The first and second reservoirs are connected with a pressure relief valve allowing fluid to escape from the first reservoir to the second reservoir when the pressure in the first reservoir exceeds a threshold and a check valve allowing fluid to flow back from the second reservoir to the first reservoir. Further disclosed is a method of cushioning a body with a cushioning device.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: November 28, 2017
    Inventor: Jeffrey W. Wilkinson
  • Patent number: 9376209
    Abstract: An aircraft store ejector systems and subsystems thereof. Embodiments can include a two-reservoir re-pressurization system wherein a remote reservoir is used to maintain desired pressure in a local ejector reservoir. The system can include a release valve having a vent valve and valve piston. The release valve can control release of pressurized gas to a pitch control valve. The pitch control valve can be configured to distribute the pressurized gas between two or more ejector piston assemblies. One or more of the ejector piston assemblies can include multiple concentric piston stages and piston chambers, the piston chambers configured to contain a volume of gas. The ejector piston assemblies can be configured to compress the volume of gas within the piston chambers as the piston stages are extended out from the aircraft. Such compression can provide a return force to the piston stages.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: June 28, 2016
    Assignee: Marvin Engineering Co., Inc.
    Inventors: Lee Allen Tobias, Sohrab John Talebian, Robert Ronald Evans
  • Patent number: 8979509
    Abstract: A screw compressor includes a casing and a compression mechanism accommodated in the casing. The compression mechanism has a screw rotor, a gate rotor and a communication mechanism. The gate rotor has a flat plate shape. A rotational axis of gate rotor is orthogonal to a rotational axis of the screw rotor. The communication mechanism is arranged to communicate a high pressure space and a low pressure space in the casing.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: March 17, 2015
    Assignee: Daikin Industries, Ltd.
    Inventors: Norio Matsumoto, Hiromichi Ueno, Shigeharu Shikano
  • Publication number: 20140271262
    Abstract: A fuel supply system for a vehicle uses a seal-less piston LPG injunction pump which pumps fluid from a storage tank to an engine. The pump uses the vehicle's pneumatic air system, wherein the pressurized air of this system alternatingly drives an actuator magnetically coupled to a piston.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Inventors: Michael E. Frey, Richard E. Foster, Michael D. Walters, Jeffrey Jay Sietsema
  • Patent number: 8827659
    Abstract: In an oil supply apparatus, a valve body includes first and second radially protruding lands, and a small-diameter portion continuously connecting the first and second lands and having a diameter smaller than at least the outer diameter of the first and second lands. Rotational speeds of a rotor are set as first, second and third rotational ranges in the ascending order. In the first rotational range, work oil from a second discharge port is fed to a first oil passage via the small diameter portion. In the second rotational range, work oil from the second discharge port is fed to a return oil passage via the small diameter portion. In the third rotational range after the second oil passage is blocked relative to the return oil passage by the second land, work oil from the second discharge port is fed to the first oil passage.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: September 9, 2014
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Yoshito Uno
  • Publication number: 20140248159
    Abstract: Methods and systems for dispensing a fluid using an automated fluid delivery system are disclosed. A pump may be configured to force an aliquot of fluid into a fluid delivery channel. A processor may receive values of a property for the aliquot and the source of the aliquot. The processor may use the values to determine the volume of the aliquot. The determined volume is compared by the processor against an expected volume to establish the amount of fluid being pumped by the pump per unit, such as time or revolutions. The processor controls operation of the pump to dispense a predetermined dose based on the amount of fluid being pumped by the pump per unit.
    Type: Application
    Filed: March 4, 2013
    Publication date: September 4, 2014
    Applicant: MEDRAD, INC.
    Inventors: Charles MARSH, Larry McCUTCHAN
  • Publication number: 20130336814
    Abstract: A pump for pumping fluid includes a tube platen, a plunger, a bias member, inlet and outlet valves, an actuator mechanism, a position sensor, and a processor. The plunger is configured for actuation toward and away from the infusion-tube when the tube platen is disposed opposite to the plunger. The tube platen can hold an intravenous infusion tube. The bias member is configured to urge the plunger toward the tube platen.
    Type: Application
    Filed: March 15, 2013
    Publication date: December 19, 2013
    Applicant: DEKA Products Limited Partnership
    Inventors: Dean Kamen, John M. Kerwin, Colin H. Murphy, Jonathan Parker, Daniel F. Pawlowski, Dirk A. van der Merwe, Larry B. Gray, Christopher C. Langenfeld, Michael S. Place, Michael J. Slate
  • Publication number: 20130224045
    Abstract: A valve arrangement is configured to rectify a volumetric flow supplied by a hydraulic pump to a first pump connection or second pump connection. The valve arrangement includes a first suction valve arranged between a suction-side connection of the valve arrangement and the first pump connection. The valve arrangement also includes a second suction valve arranged between the suction-side connection and the second pump connection. The valve arrangement also includes a first pressure valve arranged between a pumping-side connection of the valve arrangement and the second pump connection. The valve arrangement also includes a second pressure valve arranged between the pump-side connection and the first pump connection. The first suction valve is acted on by the pressure of the second pump connection in the opening direction. The second suction valve is acted on by the pressure of the first pump connection in the opening direction.
    Type: Application
    Filed: August 5, 2011
    Publication date: August 29, 2013
    Applicant: Robert Bosch GmbH
    Inventor: Sebastian Birk
  • Patent number: 8366404
    Abstract: A fuel system is described that comprises a pressure raising and shut-off valve (PRSOV), and a control valve arrangement operable to control a fuel pressure applied to a part of the PRSOV urging the PRSOV towards a closed position, wherein the control valve arrangement is supplied with fuel at a pressure controlled by a variable fluid pressure potentiometer network including a variable flow restrictor which is variable in response to changes in the position occupied by the PRSOV.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: February 5, 2013
    Assignee: Goodrich Control Systems
    Inventors: Michael Griffiths, Martin Richard Kirkman
  • Patent number: 8342815
    Abstract: Fluid inlet and outlet portions are provided for introducing and discharging a hydraulic fluid. The fluid outlet portion includes a plurality of outlet ports. A drive shaft is provided that rotates about its axis. A plurality of volume variable pump chambers are arranged about the drive shaft and rotated by the same. The pump chambers are arranged between the fluid inlet and outlet portions for compressing the hydraulic fluid from the fluid inlet portion before discharging the same from the fluid outlet portion. The pump chambers are exposed to the outlet ports separately one after another when the pump chambers are rotated by the drive shaft. A discharge rate varying mechanism is provided that varies a fluid discharge rate of each of the outlet ports by varying the amount of the fluid led to the outlet ports.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: January 1, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Yasushi Watanabe, Koji Saga
  • Publication number: 20120315152
    Abstract: An accessory flow recovery system includes an inlet that receives a first fluid flow, and a pump with a pump inlet and outlet. The pump inlet receives the first fluid flow from the inlet and discharges a second fluid flow from the outlet. The accessory flow recovery system has an actuation unit for supplying a third fluid flow to accessory components, a metering system to regulate the flow rate of the second fluid flow based on a flow demand, and an inlet pressurizing valve coupled between the outlet and the metering system. The inlet pressurizing valve regulates the second fluid flow between the pump and the metering unit. The accessory flow recovery system further includes a return switch valve to direct the third fluid flow to the metering system when the recovery system is operating in one mode, and to the inlet when the system is operating in another mode.
    Type: Application
    Filed: June 9, 2011
    Publication date: December 13, 2012
    Applicant: WOODWARD, INC.
    Inventor: Carthel C. Baker
  • Patent number: 8287255
    Abstract: A variable displacement rotary pump includes a main pump unit, an auxiliary pump unit, a discharge passage, a bypass passage, a suction passage, a check valve and a control valve. The suction passage is in communication with the discharge passage through the bypass passage and a second discharge port. The check valve is disposed in the discharge passage for preventing fluid in a first discharge port of the main pump unit from flowing into the bypass passage. The control valve is operable for opening and closing the bypass passage. When the control valve opens the bypass passage and the check valve closes the discharge passage, flow rate of the fluid discharged from the discharge passage is reduced. A throttle passage is provided in the bypass passage or the control valve for regulating flow of the fluid in early phase of operation of the control valve to open the bypass passage.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: October 16, 2012
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Hironao Yokoi, Shigeru Suzuki, Katsumi Yamashita, Toshiro Fujii
  • Patent number: 8215923
    Abstract: A system includes a compressor, a control unite and a clutch assigned to the compressor. The control unit is suitable for opening and closing the clutch in order to economize energy. The control unit is suitable for carrying out a monitoring routine during which the clutch is opened or closed in order to prevent the clutch, the compressor and the components arranged downstream of the compressor from being damaged. A method for controlling the system, including the compressor, the control unit and the clutch associated with the compressor, is also provided.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: July 10, 2012
    Assignee: KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
    Inventor: Joerg Mellar
  • Publication number: 20120045348
    Abstract: A dual-pump fluid distribution system that includes a first pump having an inlet and an outlet, and configured to supply a first flow of fluid, and a second pump having an inlet and an outlet, and configured to supply a second flow of fluid. In an embodiment, a bypass flow valve with a four-way hydraulic bridge is configured to initiate the switch between single-pump mode and dual-pump mode based on fluid flow demand. The bypass flow valve is configured such that the position of the bypass flow valve member relative to the four-way hydraulic bridge operates a pump selector valve. In an embodiment, the pump selector valve has a valve member, a biasing element, and a pressure switching port, and is configured such that the position of the valve member determines whether the second flow of fluid is combined with the first flow of fluid.
    Type: Application
    Filed: August 23, 2010
    Publication date: February 23, 2012
    Applicant: WOODWARD GOVERNOR COMPANY
    Inventor: Michael P. Garry
  • Patent number: 8092198
    Abstract: A fuel pump includes a pump housing having a compression chamber. A plunger is axially movable in the pump housing for pressurizing fuel in the compression chamber. A discharge valve is configured to open to supply fuel from the compression chamber to an internal combustion engine when pressure in the compression chamber is more than predetermined pressure. A fuel passage is configured to communicate a downstream of the discharge valve with an upstream of the discharge valve. An in-passage member is accommodated in the fuel passage. The in-passage member includes multiple members, which are combined to define a throttle portion for restricting fuel, which returns from the downstream of the discharge valve to the upstream of the discharge valve.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: January 10, 2012
    Assignee: Denso Corporation
    Inventors: Masayuki Kobayashi, Hitoshi Shibata, Tatsumi Oguri
  • Publication number: 20110268590
    Abstract: A fluid working machine, operable to carry out a motoring cycle under at least some circumstances, comprises a controller (12) and a working chamber (2) of cyclically varying volume. The working chamber has a high pressure valve (18) associated therewith to control the connection of the working chamber to a high pressure manifold (20), and an electronically controllable primary low pressure valve (14) to control the connection of the working chamber to a low pressure manifold. The controller is operable to actively control at least the primary low pressure valve, in phased relationship to cycles of working chamber volume, to determine the net displacement of fluid by the working chamber on a cycle by cycle basis. The fluid working machine is adapted to release pressurised fluid from the working chamber prior to the opening of the primary low-pressure valve, during a motoring cycle. This facilitates the opening of the primary low pressure valve.
    Type: Application
    Filed: June 22, 2009
    Publication date: November 3, 2011
    Applicant: Artemis Intelligent Power Limited
    Inventors: Uwe Bernhard Pascal Stein, Michael Richard Fielding, Stephen Michael Laird, Alasdair Ian Fletcher Robertson
  • Patent number: 7993111
    Abstract: An apparatus for preventing noise from occurring due to cavitation in a power steering pump during low temperature start-up includes the addition of a multi-passage orifice element for adding wetted surface resistance to high viscous fluid flow downstream from a single passage outlet orifice element of a fluid flow control device and upstream of an associated steering gear or steering assist valve.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: August 9, 2011
    Assignee: Ford Global Technologies, LLC
    Inventors: Samir Joshi, Leonard F. Bishop, Douglas C. Myers
  • Publication number: 20110189031
    Abstract: An apparatus for constructing a high pressure fluid pump has a piston housing, a pump head connected to and supported by the piston housing, and a pump pedestal for supporting the pump head and the piston housing. The pump head receives water at low pressure and, in combination with the piston housing, produces fluid through a flow channel at high pressure. The combination of piston housing and pump head contain a “go-thru” valve which, in response to a suction on one side of the valve allows water at low pressure to pass through the valve into a receiving chamber, and in response to a high pressure fluid in the receiving chamber enables fluid at a high pressure to pass through the valve and eventually to an output port while closing off the input path. The pump further has, in one embodiment, an aluminum pump head or manifold appropriately structured to withstand high pressure fluid impact.
    Type: Application
    Filed: May 5, 2010
    Publication date: August 4, 2011
    Inventor: Da Quan Zhang
  • Publication number: 20110052419
    Abstract: To regenerate a compressed air supply device of a commercial vehicle, a first compressed air circuit is supplied with compressed air until reaches a predetermined target pressure value; then a second compressed air circuit is supplied. Between these steps, the method: (1) regenerates an air dryer when the pressure in the first compressed air circuit has reached the target pressure value, and when a moisture value of the air dryer exceeds a predetermined target moisture value; (2) terminates the regeneration when the pressure has dropped to a predetermined limit pressure value or the moisture value of the air dryer has reached or dropped below the target moisture value; (3) supplies the first compressed air circuit until it has reached the predetermined target pressure value; and (4) repeats the preceding intermediate steps when the moisture value is greater than the target moisture value.
    Type: Application
    Filed: August 25, 2010
    Publication date: March 3, 2011
    Applicant: KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
    Inventors: Zoltán Bordacs, Huba Nemeth, Andras Szoboszlay
  • Patent number: 7877186
    Abstract: To detect a failure of a compressed air consumer circuit in a compressed air system for vehicles, pressure is continuously measured in compressed air consumer circuits and evaluated in an electronic control unit which compares the pressure values and/or determined negative pressure gradients of the compressed air consumer circuits with a respective threshold value and shuts off an air-consumer circuit if the pressure values and/or negative pressure gradients thereof satisfy a circuit-failure criterion. The circuit-failure criterion is satisfied when the pressure values and/or pressure gradients are below the respective threshold value for a time equal to or longer than the time of a dynamic pressure change or of a dynamic pressure collapse.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: January 25, 2011
    Assignee: WABCO GmbH
    Inventors: Carsten Detlefs, Heinrich Diekmeyer, Frank-Dietmar Lippelt, Joachim Reinhardt, Bernd Strilka
  • Publication number: 20100322791
    Abstract: If a hydraulic system has several modes of operation, in particular a mode with a high pressure demand (II) and a mode with a high fluid flow demand (II), the hydraulic fluid pump has to be built with an accordingly high fluid flow output. Such a pump is expensive. Therefore it is suggested, to provide two pumps. I.e. a controllable main pump (2) is provided, which supplies the hydraulic consumer (6) during phases (I) of high pressure demand. During phases (II) of high fluid flow demand, normally, relatively low pressures are sufficient. Therefore, it is suggested to provide a parallel boost pump (9), which supplies the hydraulic consumer (6) in addition to the high pressure pump (2), if a high fluid flow is needed. Excess fluid flow output is avoided by controlling the fluid output flow of main pump 2.
    Type: Application
    Filed: October 29, 2008
    Publication date: December 23, 2010
    Applicant: Sauer-Danfoss ApS
    Inventors: Luke Wadsley, Niall Caldwell
  • Publication number: 20090085312
    Abstract: A pressure keeping mechanism is provided downstream of a discharge port of a compressor. The pressure keeping mechanism is set to a small flow path area having only a bypass orifice until a pressure in a downstream pipe reaches a predetermined pressure after the operation is started, the pressure keeping mechanism is set to a large flow path area of a pressure keeping valve which is opened when the pressure exceeds the predetermined pressure and the bypass orifice, thereby changing the flow path area at least in two stages. The pressure in the upstream pipe which is almost closed by the pressure keeping valve can be thus increased at a dash and the pressure in a compression chamber can also be increased swiftly immediately after the compressor is started.
    Type: Application
    Filed: September 29, 2008
    Publication date: April 2, 2009
    Applicant: Hitachi, Ltd.
    Inventors: Shunsuke Mori, Kazutaka Suefuji
  • Publication number: 20090053077
    Abstract: A flow prioritizing system includes a regulating valve and a flow prioritizing valve. The regulating valve receives a first portion of the fluid supplied from a fuel supply pump, and is responsive to a control pressure to selectively allow or prohibit flow to secondary loads. The flow prioritizing control valve is responsive to fluid pressure representative of delivery pump discharge pressure to control the control pressure to which the regulating valve is responsive.
    Type: Application
    Filed: August 23, 2007
    Publication date: February 26, 2009
    Applicant: HONEYWELL INTERNATIONAL, INC.
    Inventors: Eric M. Arnett, Paul W. Futa, Jr.
  • Patent number: 7101155
    Abstract: A vacuum pump system (10; 36; 46) for pumping gas from an enclosure (12) comprises: a vacuum pump unit (14) having a pump inlet (16) connectable with an outlet (18) of such an enclosure and a pump outlet (20) for exhausting gas; and a chamber (22; 50) selectively connectable with the pump inlet and the pump outlet, such that, in use, in a first state gas can be pumped from the chamber to the pump inlet by the vacuum pump unit and in a second state gas can be evacuated from the pump outlet to the chamber to reduce pressure at the pump outlet. A method of controlling the vacuum pump system (10; 36; 46) comprises a first step of pumping gas from the chamber to the pump inlet using the vacuum pump unit and a second step of allowing gas to be evacuated from the pump outlet to the chamber to reduce pressure at the pump outlet.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: September 5, 2006
    Assignee: The BOC Group Plc
    Inventors: Derek Graeme Madgewick Savidge, Neil Turner, Graeme Huntley
  • Patent number: 6962485
    Abstract: A fuel metering unit for controlling a variable displacement pump including a main metering valve in fluid communication with the pump for metering an output of the pump, a pressure regulator in fluid communication with the metering valve to create a spill return and a control valve in fluid communication with the pressure regulator and the pump for regulating the spill return flow so the spill return flow is maintained substantially constant at a low level to minimize the heat generated by recirculation by setting a displacement of the pump.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: November 8, 2005
    Assignee: Goodrich Pump and Engine Control Systems, Inc.
    Inventors: George L. Bennett, William H. Dalton, Raymond D. Zagranski
  • Patent number: 6682316
    Abstract: A dispensing system for petrol pumps, comprising a pump, a dispensing valve in a petrol pump nozzle and an electrically controllable solenoid valve (10), characterized in that the solenoid valve (10) includes a directly acting principal valve (18) and a bypass valve (30) arranged so as to bypass the principal valve (18), and a solenoid drive (34) by which in case of a differential pressure present above the sealing seat (24) of the principal valve (18) at first only the bypass valve (30) is able to be switched to the open position, and only after a pressure compensation has, occurred at the sealing seat (24) of the principal valve (18) by the opening of the bypass valve (30) is the principal valve (18) also able to be switched to the open position.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: January 27, 2004
    Assignee: Burkert Werke GmbH & Co.
    Inventor: Harald Böke
  • Patent number: 6641372
    Abstract: A hydraulic pump includes a housing, a primary discharge outlet, an auxiliary discharge outlet, and a flow control valve for controlling fluid flow from the primary and auxiliary discharge outlets. A first fluid passageway within the housing passes fluid from a first discharge port to the primary discharge outlet, and a second fluid passageway within the housing passes fluid from a second discharge port to a common port of the flow control valve. In a first position, the valve directs fluid from the second discharge port to the primary discharge outlet. In a second position, the valve diverts fluid from the second discharge port to the auxiliary discharge outlet. The valve may be positioned in response to such operating conditions as excessive pressure differential between the high and low-pressure sides, excessive pump rate of rotation (RPM), or excessive rate of fluid flow, among others.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: November 4, 2003
    Assignee: Delphi Technologies, Inc.
    Inventors: Thomas C. Rytlewski, David R. Aden, James L. Davison
  • Patent number: 6497557
    Abstract: A sliding vane pump comprising a rotor housing having a pumping chamber, a rotor in the pumping chamber having a plurality of radially disposed slots, and a plurality of sliding vanes disposed in the slots configured to extend to follow an inner wall of said pumping chamber.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: December 24, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: David R. Aden, Thomas C. Rytlewski, Jerrod M. Etienne, David Fredrick Hammerbacher, Bruce Alan Tucker, Roy William Heath
  • Publication number: 20020187056
    Abstract: A rapid tire inflation plant comprising a low pressure high flow inflating gas source (2), an inflation device (DG), a motor (T), a compressor (C) driven by said motor and a control circuit arranged to control feed of low pressure inflating gas from said inflating gas source (2) to said compressor (C) and the feed of inflating gas at a relatively high flow and pressure to said inflation device (DG).
    Type: Application
    Filed: October 23, 2001
    Publication date: December 12, 2002
    Inventor: Tullio Gonzaga
  • Publication number: 20020136645
    Abstract: A closed level control system includes an air dryer (10) which is mounted in a pressurized air line (4). The compressor output (16) can be connected to the pressurized air supply vessel (12) via the pressurized air line (4). Air from the atmosphere can be transferred via an intake valve (30) into the pressurized air supply vessel (12) via the compressor and the air dryer (10). Furthermore, pressurized air can be discharged into the atmosphere from the pressurized air supply vessel (12) via the air dryer (10) and the intake valve (30). There is a flow in the opposite direction through the air dryer than when filling the pressurized air supply vessel (12) from the atmosphere. In this way, an excellent regeneration of the air dryer (10) is ensured.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 26, 2002
    Inventors: Uwe Folchert, Christoph Behmenburg, Helge Westerkamp, Werner Grabherr, Dierk Hein
  • Patent number: 6428285
    Abstract: The invention relates to a hydraulic delivery device with a displacement unit which delivers a medium from a suction connection under output pressure to a pressure connection, connectable with a consumer, and under consumer pressure, and a regulating device for setting and/or limiting a volume flow delivered by the delivery device.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: August 6, 2002
    Assignee: LuK Fahrzeung-Hydraulik GmbH & Co. KG
    Inventors: Peter Breuer, Van Doan Nguyen, Hans-Jürgen Lauth, Randolf Körtge, Martin Jordan, Volker Seipel, Christof Lausser
  • Patent number: 6379132
    Abstract: A fuel pump comprising a pumping plunger reciprocable within a bore, and a drive arrangement for driving the pumping plunger. The drive arrangement includes a compressible load transmission arrangement for transmitting movement of the drive arrangement to the pumping plunger. The load transmission arrangement comprises first and second surfaces which define, therebetween, a chamber for fluid. The fuel pump also comprises supply means for permitting the chamber to be supplied with fluid, in use, and control means for controlling the flow of fluid from the chamber.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: April 30, 2002
    Assignee: Delphi Technologies, Inc.
    Inventor: Anthony John Williams
  • Patent number: 6276154
    Abstract: A two-step metering device for controlling the flow of an operating fluid to a variable capacity compressor is provided. The metering device includes a valve that defines a fluid flow path having a large orifice configured to allow a flow rate corresponding to a high operating capacity of the compressor and a small orifice configured to allow a flow rate corresponding to a reduced operating capacity of the compressor. The metering device further includes a control operable to adjust the valve to direct the operating fluid through the large orifice when the compressor is operating at the high capacity and to direct fluid through the small orifice when the compressor is operating at the reduced capacity.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: August 21, 2001
    Assignee: Bristol Compressors, Inc.
    Inventor: Larry Pippin
  • Patent number: 6250894
    Abstract: A system allows pumps to run in parallel and preventing back flow through a non-operational pump. The system includes a first pump in parallel with a second pump. The system further includes a check valve in fluid communication with the first pump for preventing flow through the first pump when the first pump is not operating. The system further includes a sensing valve in fluid communication with the first pump and the second pump. The system also includes a load sharing valve in fluid communication with the check valve, the sensing valve, and the second pump for controlling a system flow, wherein the system flow is provided by the first pump when the second pump is not operating, and wherein the system flow is provided by the second pump when the first pump is not operating, and wherein the system flow includes a portion of flow from both the first and second pumps when both pumps are operational.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: June 26, 2001
    Assignee: United Technologies Corporation
    Inventors: Gerald P. Dyer, Charles E. Reuter
  • Publication number: 20010004443
    Abstract: The invention relates to a closed level control system for a vehicle. The closed level control system includes a pump which transfers a pressurized medium between a pressurized medium supply vessel (4) and pressurized medium chambers (2a to 2d). The input (8) of the pump (6) is connected to the supply vessel (4) and the output (10) of the pump (6) is connected to the pressurized medium chambers (2a to 2d) when the pressurized medium is to be pumped from the supply vessel (4) into the pressurized medium chambers (2a to 2d). If, in contrast, pressurized air is to be pumped from a pressurized medium chamber (2a to 2d) into the supply vessel (4), then the input (8) of the pump (6) is connected to the pressurized medium chamber and the output (10) of the pump (6) is connected to the supply vessel (4). The above-mentioned connections preferably take place via controllable directional valves (14, 18). The level control system makes it possible that the pump (6) has to always run only in one direction.
    Type: Application
    Filed: December 11, 2000
    Publication date: June 21, 2001
    Inventors: Christof Behmenburg, Helge Westerkamp
  • Patent number: 6179581
    Abstract: A pump having a pump housing with a rotor in it, particularly a vane pump. The pump housing having a centering aid in the form of a sleeve that extends toward a drive shaft. The shaft has a smaller diameter than the bore through the sleeve. The shaft has a preferably toothed end portion that is received in a non-positively locking manner in the rotor. In a single stroke vane pump, the axis of the drive shaft is offset from the axis of the sleeve to compensate for the forces in pumping. The housing over the rotor and drive thereto is disclosed.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: January 30, 2001
    Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KG
    Inventors: Karsten Schnittger, Hans-J{umlaut over (u)}rgen Lauth
  • Patent number: 6089831
    Abstract: An air compressor, from whose outlet a supply line leads to an air drier for the purpose of supplying the compressed air system. On the outlet side of the air drier, the supply line branches into a plurality of line branches that lead to at least two consumer circuits. The pressure in the consumer circuits can be monitored by pressure sensors. Furthermore, control electronics are provided which are connected to the pressure sensors. The consumer circuits can be disconnected from the compressed air supply by a closing member that is disposed in the respective supply line branch and can be switched by the programmable control electronics. By means of this, the supply of compressed air into the consumer circuits and the withdrawal of compressed air for transfer from one circuit into the others can be controlled by the control electronics. The compressed air supply device can be used in the vehicle compressed air systems of commercial vehicles.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: July 18, 2000
    Assignee: Knorr-Bremse, Systeme fur Nutzfahrzeuge GmbH
    Inventors: Werner Bruehmann, Matthias Alt
  • Patent number: 6086337
    Abstract: An oil pump effects a pumping action to deliver oil from an inlet port to a first outlet port and also to a second outlet port. An oil supply passage is connected to the second outlet port. A regulator valve has a bore, a spool disposed in the bore, a pressure chamber, and a pressure admission port connected to the oil supply passage and communicating with the pressure chamber. A branch passage connected to the oil supply passage opens to the bore. The regulator valve also has relief port connected to the inlet port and opening to the bore, and a transfer port connected to the first outlet port. The spool disposed in the bore is moveable responsive to pressure within the pressure chamber between a first position in which the transfer port is connected to the branch passage and a second position in which the transfer port is connected to the relief port.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: July 11, 2000
    Assignee: Unisia Jecs Corporation
    Inventors: Yasushi Watanabe, Hideaki Ohnishi
  • Patent number: 6050779
    Abstract: A conveying system comprising a pump whose power source is an unstable electric power supply, such as a solar cell; a first supply pipe for conveying liquid from an intake to the pump; a second supply pipe for conveying the liquid from the pump to a discharge opening; a liquid storage tank provided at a position which is below the discharge opening and above the pump; a third supply pipe branching from the second supply pipe, for conveying the liquid to the liquid storage tank; a fourth supply pipe connected between the liquid storage tank and the first supply pipe; a first valve, provided between the branching point of the first and fourth supply pipes and the intake, for opening and closing the first supply pipe; a second valve, provided between the branching point of the second and third supply pipes and the discharge opening, for opening and closing the second supply pipe; a third valve for opening and closing the third supply pipe; and a fourth valve for opening and closing the fourth supply pipe.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: April 18, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshitaka Nagao, Kimitoshi Fukae, Nobuyoshi Takehara
  • Patent number: 6033190
    Abstract: In a vane cell pump for pumping a pressure fluid from a container to a consumer, all the essential components and functional characteristics are accommodated in a bearing housing (10). The components include a suction connection (13) for connecting to the container, a pressure connection (14) for connecting to the consumer, a flow regulating valve (15) for regulating the pressure fluid pumped to the pressure connection (15), a pressure limiting valve (16) and suction and pressure conduits, which connect the work chambers to the suction connection (13), flow regulating valve (15), and pressure limiting valve (16). Also located in the bearing housing (10) is the sole radial bearing point of a drive shaft (12), by which a rotor (5) is supported in a cam ring (4). Between the cam ring (4), the rotor (5) and vanes (6) are inserted into it, so that work chambers are formed, which are defined in the axial direction by two control plates (7, 8).
    Type: Grant
    Filed: December 30, 1997
    Date of Patent: March 7, 2000
    Assignee: ZF Friedrichshafen AG
    Inventor: Johann Merz
  • Patent number: 5984644
    Abstract: A dual outlet washer pump for an automotive vehicle to alternately supply a stream of washer fluid to separate locations has a valve element with a frame portion surrounding a flat, flexible membrane mounted in vertically plainer fashion in a discharge section, which is movable from a center position unobstructing either of a pair of discharge ports to a first position in which fluid flow from a pumping chamber enters a first discharge side of the discharge section to directly impact a first side of the membrane causing flexure thereof away from the first discharge port to fluid flow there through and can currently causes contact of a second side of the membrane within an inner, lateral side of the discharge section adjacent the second discharge port to block fluid flow there through, the membrane opening the second discharge port and closing the first discharge port in the like manner when an impeller pump is rotated in a counter direction.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: November 16, 1999
    Assignee: Ford Motor Company
    Inventors: Dequan Yu, Frances S. Marchand
  • Patent number: 5975232
    Abstract: A power assisted steering apparatus for a vehicle has a driving source and an actuator for the vehicle's steering mechanism, to power assist the steering operation. The driving source, such as an engine, continuously drives a pump. A working passage is arranged so that working oil discharged from the pump is introduced into the actuator. A check valve is disposed in the working passage, between the actuator and the pump so that the working oil flows only one way to the actuator. An accumulator is connected to the working passage, between the check valve and the actuator to maintain a predetermined pressure in the working passage. A regulator is connected to the working passage, between the pump and the check valve to regulate flow to the actuator. When the pressure within the working passage reaches the predetermined pressure, the working fluid is dumped to a reservoir, bypassing the check valve, the accumulator, and the actuator.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: November 2, 1999
    Assignee: Unisia Jecs Corporation
    Inventors: Koichi Komatsu, Tatsuyoshi Maruyama, Tadaharu Yokota, Toshinori Aihara, Norihiro Saita