Plural Pump Units With Individual Or Relative Control Patents (Class 417/286)
  • Patent number: 10436199
    Abstract: In a rotary compressor, a protruding portion which protrudes downward from a bottom end of a rotation shaft and in which an outer diameter is smaller than an outer diameter of a sub-bearing unit is formed on the sub-bearing unit which is provided on a lower end plate, a step portion is formed between the protruding portion and the sub-bearing unit, and a center hole of a lower end plate cover is caused to mate with the protruding portion and is caused to come into close contact with the step portion.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 8, 2019
    Assignee: Fujitsu General Limited
    Inventors: Taku Morishita, Naoya Morozumi
  • Patent number: 10344990
    Abstract: A set for assembling a heat source unit of an air conditioner at the site of the air conditioner, includes a heat source heat exchanger module having a first casing, a heat source heat exchanger and a compressor module port fluidly communicated with the heat source heat exchanger, a compressor module having a second casing separate from the first casing, a compressor and a heat source heat exchanger module port fluidly communicated with the compressor, wherein the heat source heat exchanger module and the compressor module are fluidly communicatable via the compressor module port and the heat source heat exchanger port, a main board comprising a control logic of the air conditioner and a first electric connector, wherein at least one of heat source heat exchanger and compressor modules has a circuit board comprising a second electric connector, the circuit board of such a module being configured for data communication with the main board upon electrical connection of the circuit board and the main board via t
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: July 9, 2019
    Assignees: DAIKIN INDUSTRIES, LTD., DAIKIN EUROPE N.V.
    Inventors: Frans Baetens, Pieter Pirmez, Jan Vanooteghem
  • Patent number: 10180271
    Abstract: The multiple cylinder rotary compressor includes a compressor body including a hermetic case, the hermetic case housing inside a rotating shaft, an electric motor section, and a compression mechanism body. The compression mechanism body includes at least three compression mechanism sections which stack with each other, partition plates between the corresponding adjacent compression mechanism sections, and a primary bearing and a secondary bearing supporting the rotating shaft on both end sides of the compression mechanism body. The compression mechanism sections include a cylinder forming inside a cylinder chamber, an eccentric section provided to the rotating shaft, disposed in the cylinder chamber, a roller fitted to the eccentric section, rotating eccentrically within the cylinder chamber, and a blade dividing the inside of the cylinder chamber into two. At least one partition plate constitutes a partition plate bearing supporting the rotating shaft.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: January 15, 2019
    Assignee: TOSHIBA CARRIER CORPORATION
    Inventors: Takuya Hirayama, Isao Kawabe
  • Patent number: 10065623
    Abstract: A method and device for testing the output pressure of a compressed air unit is disclosed. A pressure verification device includes a first port configured for attachment to a compressed air unit. A first pressure relief valve is connected to a second port of the pressure verification device and is set to open at a first set pressure. A switching valve is connected to a third port. When the pressure is at least the first set pressure, a path to atmosphere is established from the first port through the first pressure relief valve when the switching valve is in the closed position. In addition, the first pressure relief valve comprises a means for at least one of an audible, a tactile and a visual indicator of the operation of the compressed air unit.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: September 4, 2018
    Assignee: Bendix Commercial Vehicle Systems LLC
    Inventor: Chad J. Benesh
  • Patent number: 10041508
    Abstract: A hydraulic unit includes two pressure connections for supplying devices, in particular hydraulic rescue devices, including a first hydraulic circuit with a first pump arrangement and a first pressure connection and a second hydraulic circuit with a second pump arrangement and a second pressure connection, wherein the pump arrangements are driven at the same time by a common drive, and wherein by a first valve switch the first hydraulic circuit can be connected to the second hydraulic circuit and by a second valve switch the second hydraulic circuit can be connected to the first hydraulic circuit. The valve switches include a spring acting in the direction of an initial position and from the first hydraulic circuit or from the second hydraulic circuit a first control line runs to the first valve switch and from the second hydraulic circuit or from the first hydraulic circuit a second control line runs to the second valve switch.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: August 7, 2018
    Assignee: Weber-Hydraulik GmbH
    Inventors: Johann Schmollngruber, Johann Auer, Hans-Wilhelm Weiss
  • Patent number: 9552685
    Abstract: A transparent, automatic ball blower configured to generate random outcomes for a game by air-mixing Ping-Pong-style balls in a mixing chamber. During game play, the balls extracted from the mixing chamber via an extractor pipe are subsequently carried by a computer-controlled, motorized ball carrier mechanism to an inlet of a ball accumulator compartment. The ball accumulator compartment may be located proximate to the ball mixing chamber. The ball carrier mechanism moves and drops the extracted balls, one-at-a-time, into the ball accumulator compartment. The balls fall into the ball accumulator compartment by means of gravity alone. The balls fill the ball accumulator compartment which, in one version, accommodates a single vertical layer of balls allowing visual inspection of the balls. At the end of game play, the balls are released from the ball accumulator compartment into the mixing chamber through a computer-controlled, motorized ball release gate.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: January 24, 2017
    Assignee: Fortunet, Inc.
    Inventors: Yuri Itkis, Leo Schpak, Valeri Tsaturyan
  • Patent number: 9464580
    Abstract: A prime mover transfers power to a separate hydraulic circuits via a power take off (PTO). In some situations, a peak torque demand in one of the hydraulic circuits may cause the total torque of all hydraulic circuits to exceed a rated torque at the PTO. An apparatus measures hydraulic fluid pressure in a first hydraulic circuit and adjusts the hydraulic fluid pressure in a second hydraulic circuit. Because pressure is directly correlated to torque at a pump, by adjusting the pressure in the second circuit based on the current pressure in the first hydraulic circuit, the total torque may be capped below the maximum torque rating at the PTO. The first hydraulic circuit may have a higher priority function, such as steering, compared to that of the second hydraulic circuit which may, for example, power a tool.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: October 11, 2016
    Assignee: Caterpillar Paving Products Inc.
    Inventors: James A. Aardema, Eric Engelmann
  • Publication number: 20150114477
    Abstract: A fuel supply system for an aircraft is provided for delivering in use fuel from a fuel tank to an aircraft powerplant. The in use fuel flows along a fuel flow passage from the fuel tank to the powerplant. A downstream pump is associated with the powerplant and configured to draw fluid along the fuel flow path so as to supply it to the powerplant in use. An upstream pump is disposed in or associated with the fuel tank and operable to pump fluid along the fuel flow passage. A pressure sensor is configured to monitor a pressure at an inlet to the downstream pump. A fuel system controller is responsive to the pressure sensor and configured to control the upstream pump so as to maintain the pressure at the inlet to the downstream pump at or above a predetermined threshold pressure.
    Type: Application
    Filed: April 18, 2013
    Publication date: April 30, 2015
    Inventor: John Henry Wood
  • Publication number: 20150098841
    Abstract: The subject matter described herein relates to a spin pump that includes a combination of a compressor and a vacuum pump on respective pistons extending from a common crankshaft in a rotating housing. Related methods, apparatuses, systems, techniques and articles are also described.
    Type: Application
    Filed: October 9, 2014
    Publication date: April 9, 2015
    Inventor: John Corey
  • Publication number: 20150030472
    Abstract: A hydraulic pressure supply system of an automatic transmission for a vehicle may be provided with first and second pump chambers and may supply hydraulic pressure generated at the first and second pump chambers selectively to a high pressure portion or the high pressure portion and a low pressure portion. The hydraulic pressure generated at the first pump chamber may be supplied to the high pressure portion through a high-pressure regulator valve, and the hydraulic pressure generated at the second pump chamber may be supplied to the low pressure portion through a low-pressure regulator valve or may be supplied to the high-pressure regulator valve according to switching operation of a switch valve.
    Type: Application
    Filed: December 31, 2013
    Publication date: January 29, 2015
    Applicant: Hyundai Motor Company
    Inventor: Taehwan WI
  • Publication number: 20140294618
    Abstract: An automatic-transmission hydraulic pressure supply system includes a low-pressure hydraulic pump supplying low hydraulic pressure to a first low-pressure line, a low-pressure regulator valve recirculating through a first recirculation line a portion of the hydraulic pressure supplied through the first low-pressure line to regulate the hydraulic pressure of the first low-pressure line, and supplying the regulated hydraulic pressure to a low pressure portion through a second low-pressure line, a high-pressure hydraulic pump receiving a portion of the hydraulic pressure of the first low-pressure line, increasing and supplying the increased hydraulic pressure to a high pressure portion through a high-pressure line, and a high-pressure regulator valve recirculating a portion of the hydraulic pressure supplied through the high-pressure line through second and/or third recirculation lines, and supplying the regulated hydraulic pressure to the high pressure portion.
    Type: Application
    Filed: November 15, 2013
    Publication date: October 2, 2014
    Applicant: Hyundai Motor Company
    Inventors: Se Hwan Jo, Jin Young Hwang, Taehwan Wi
  • Patent number: 8801407
    Abstract: A hydraulic power device for effecting operation of at least one load, the hydraulic power device including a motor having a predetermined motor speed rating and motor power rating, at least one pump operably coupled to the motor, the pump being configured to provide, to the at least one load, a predetermined hydraulic fluid flow at the predetermined motor speed rating, and a variable frequency drive connected to the motor, the variable frequency drive being configured to effect operation of the motor at a speed above the predetermined motor speed rating such that the at least one pump operates to provide an excess hydraulic fluid flow during operation of the motor substantially above the predetermined motor speed rating where the excess fluid flow is greater than the predetermined hydraulic fluid flow.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: August 12, 2014
    Assignee: Harris Waste Management Group, Inc.
    Inventor: Edwin K. Simpson
  • Patent number: 8721884
    Abstract: Disclosed are hemodialysis and similar dialysis systems including fluid flow circuits. Hemodialysis systems may include a blood flow path, and a dialysate flow path including balancing, mixing, and/or a directing circuits. Preparation of dialysate may be decoupled from patient dialysis. Circuits may be defined within one or more cassettes. The fluid circuit and/or the various fluid flow paths may be isolated from electrical components. A gas supply may be provided that, when activated, is able to urge dialysate through the dialyzer and blood back to the patient. Such a system may be useful during a power failure. The hemodialysis system may also include fluid handling devices, such as pumps, valves, mixers, etc., actuated using a control fluid. The control fluid may be delivered to the fluid handling devices using a detachable external pump. The fluid handling devices may have a spheroid shape with a diaphragm dividing it into two compartments.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: May 13, 2014
    Assignee: DEKA Products Limited Partnership
    Inventors: Michael J. Wilt, Jason A. Demers, Kevin L. Grant, Brian D. Tracey, James D. Dale
  • Patent number: 8668465
    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: Grant
    Filed: October 29, 2008
    Date of Patent: March 11, 2014
    Assignee: Sauer-Danfoss Aps
    Inventors: Luke Wadsley, Niall Caldwell
  • Patent number: 8636483
    Abstract: A pump apparatus configured with a first pump for pumping working fluid in accordance with a reciprocation of a piston using a space between a first open/close valve for suction and a second open/close valve for discharge as a pump chamber. The pump apparatus is also configured a first flow passage for supplying the working fluid from a supply source to an operation subject via the first open/close valve, the pump chamber, and the second open/close valve in accordance with an operation of the first pump. A second flow passage supplies the working fluid pumped by a second pump, which is different from the first pump, to the pump chamber. A selector is configured to select either the first flow passage or the second flow passage.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: January 28, 2014
    Assignee: Aisin AW Co., Ltd.
    Inventors: Tetsuya Shimizu, Kazuhiko Kato, Kazunori Ishikawa, Noriomi Fujii
  • Patent number: 8616857
    Abstract: An oil pump unit with a variable flow rate includes lubrication pumps and a control pump that are driven by rotation of a crankshaft of an engine, and changes an oil supply amount from the control pump to each part of the engine, in which the control pump includes a plurality of oil pumps that have different discharge rates.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: December 31, 2013
    Assignees: Yamada Manufacturing Co., Ltd., Honda Motor Co., Ltd.
    Inventors: Keiichi Kai, Junichi Miyajima, Noriyuki Kawamata, Toshimasa Mitsubori, Satoshi Ino
  • Patent number: 8596993
    Abstract: A dual-supply fluid distribution system includes a first pump having an inlet and an outlet. The first pump is configured to supply a first fluid flow. A second pump has an inlet and an outlet, and is configured to supply a second fluid flow. A check valve is coupled between the first and second pump outlets. The check valve is configured to combine the second fluid flow with the first fluid. A bypass valve is coupled to the outlet of the first pump. The bypass valve has an integral pilot valve and is configured to permit fluid flow from the pump outlets in excess of the fluid demand to recirculate back to the first and second pump inlets. The bypass valve and integral pilot valve are configured to cause the check valve to open when the flow of fluid through the bypass valve is below a threshold amount.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: December 3, 2013
    Assignee: Woodward, Inc.
    Inventor: Joel W. Kleckler
  • Patent number: 8591199
    Abstract: An improved system and methodology for starting up a gas-turbine driven multi-stage compressor. The improvement involves isolating individual compression stages and creating positive pressure in each stage prior to initiating rotation of the compressor/driver system. The isolation of individual compression stages allows the turbine to reach normal operating speeds with substantially no supplemental power from an auxiliary source.
    Type: Grant
    Filed: January 11, 2007
    Date of Patent: November 26, 2013
    Assignee: ConocoPhillips Company
    Inventors: Bobby D. Martinez, John R. Wolflick, Jaleel Valappil
  • Patent number: 8579599
    Abstract: A system for changing a pump displacement configuration includes a blender that provides low-pressure fluid to a pump. The pump has a power end and fluid end, where the fluid end includes a number of plungers. The system includes an actuator that couples the power end with a selectable subset of the plungers. The system further includes a controller that selects a subset of the plungers according to a job pumping rate, a job pumping pressure, and/or a fluid end failure event indicator. The controller further commands the actuator to couple the selected subset of the plungers to the power end.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: November 12, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Edward Leugemors, Rajesh Luharuka
  • Patent number: 8540498
    Abstract: A control method and apparatus for critical rotational speed avoidance in a compressor-expander set in a gas refrigeration system. By varying an opening of an antisurge or recycle valve, a shaft power used by the compressor in the compressor-expander set may be varied, thereby varying the rotational speed of the compressor-expander set to move it away from its critical speed zone. Additionally, a feedforward signal may be provided by a compressor-expander set control system to cause an antisurge valve for a recycle compressor to open upon a trip or shutdown of one compressor-expander set.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: September 24, 2013
    Assignee: Compressor Controls Corp.
    Inventors: Saul Mirsky, Wayne Jacobson, David J. Hoogerwerf
  • Patent number: 8529402
    Abstract: A pump arrangement for fluid in an automotive transmission system includes, but is not limited to a first, low-pressure pump stage and a second, high-pressure pump stage, the first pump stage supplying low-pressure fluid to a lubrication/cooling system and to the inlet of second pump stage, which supplies high pressure fluid to a hydraulic control system. Fluid from both systems is returned via a reservoir and filter to the first pump stage.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: September 10, 2013
    Assignee: GM Global Technology Operations LLC
    Inventor: Eckhard Kirchner
  • Patent number: 8523537
    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: Grant
    Filed: August 23, 2010
    Date of Patent: September 3, 2013
    Assignee: Woodward, Inc.
    Inventor: Michael P. Garry
  • Patent number: 8522913
    Abstract: A transmission assembly for a work machine (10) includes a transmission (16) having a transmission housing (18), a manifold housing (20) attached to the transmission housing (18), and hydraulic pump (22) configured to be connected to the manifold housing (20).
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: September 3, 2013
    Assignee: Deere & Company
    Inventors: Marcelo Mussoi, Dwayne A. Nystrom
  • Patent number: 8439805
    Abstract: An automatic vehicle transmission comprises a first oil supply unit (10) with at least one mechanically driven first pump (11) and a second oil supply unit (20) with at least one electrically driven second pump (21), and a valve device (14) and a clutch system (1). The second oil supply unit (20) supplies the clutch system (1), during a first operating condition, and the first oil supply unit (10) supplies the clutch system (1), during a second operating condition.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: May 14, 2013
    Assignee: ZF Friedrichshafen AG
    Inventors: Rainer Grundler, Thilo Schmidt, Christian Popp, Heinrich Zeller
  • Patent number: 8413783
    Abstract: A power transmission device that includes a clutch that transmits power from a motor to an axle; a first pump that is driven by power from the motor to generate and output fluid pressure; a second pump that receives and is driven by a supply of electric power to generate and output fluid pressure; a line pressure generating valve that is operated by operation fluid input to an operation input port, and regulates fluid pressure output from the first pump to generate a line pressure for engaging the clutch; and a switching valve that switches between a first connection state and a second connection state.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: April 9, 2013
    Assignee: Aisin AW Co., Ltd.
    Inventors: Tetsuya Shimizu, Kazuhiko Kato, Naoyuki Fukaya, Kazunori Ishikawa
  • Publication number: 20130078114
    Abstract: A pump system using multiple reciprocating positive displacement pumps which phase shift is controlled by a phase shift controller. The phase shift controller uses a virtual master pump inside the phase shift controller which is used as a phase reference against which the phase shifts of the individual pumps is calculated. The phase shift controller adjusts the speed reference set-point for the variable speed drives of the individual pumps such that a desired phase shift is obtained and maintained. The operation of multiple reciprocating pumps using phase shift control can significantly reduce the pressure pulsation levels in the pump system. The use of a virtual master pump eliminates master slave scheduling and increases system reliability and availability as the operating of the phase control is not depending on the reliability of a real master pump.
    Type: Application
    Filed: April 5, 2011
    Publication date: March 28, 2013
    Applicant: WEIR MINERALS NETHERLANDS B.V.
    Inventors: Rudolfus Johannes Adeleida Van Rijswick, Felix Johannes Jacobus Van Osch
  • Patent number: 8403646
    Abstract: An oil pump system for a vehicle includes: a vane pump having a plurality of vanes which respectively project retractably from a plurality of vane accommodating grooves provided in a rotor so as to be brought into sliding contact with a cam surface, the vane pump being adapted to supply a hydraulic fluid to an automatic transmission; an electric power-driven oil pump for assisting the hydraulic pressure of the hydraulic fluid during an idling stop of the automobile; and an ECU for controlling its operation. During an idling stop, the hydraulic fluid is fed to the automatic transmission by the operation of the electric power-driven oil pump to assist the hydraulic pressure, while the hydraulic fluid is fed with pressure also to the vane accommodating grooves to press the vanes against the cam surface.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: March 26, 2013
    Assignee: JTEKT Corporation
    Inventor: Koudi Yoshinami
  • Patent number: 8337176
    Abstract: A compressor assembly includes at least two tandem compressors. Tandem compressors have at least one common suction manifold, communicating a source of working fluid to be compressed by each of at least two compressors, and at least one common discharge manifold communicating a compressed fluid downstream for further use. A common intermediate pressure manifold communicates with intermediate pressure ports in at least two compressors. The intermediate manifold may communicate fluid to or out of the at least two compressors. There is normally no direct communication between suction and discharge manifolds.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: December 25, 2012
    Assignee: Carrier Corporation
    Inventors: Alexander Lifson, Michael F. Taras
  • Patent number: 8302406
    Abstract: A fuel delivery and control system is provided including a dual pump fluid circuit configuration comprising a fixed positive displacement pump sized to supply the main engine burn flow ranging from above windmill through cruise, a positive displacement actuation pump including a variable pressure regulator, wherein the actuation pump is sized to supply fluid to engine actuators, valves and other hydraulically operated engine components and a pump flow sharing system interconnecting the two pumps. The combined flow from the two pumps is sufficient to meet the engine flow demand for windmill relight and maximum flow conditions. During cruise or normal operating conditions, the pumps operate in completely isolated flow circuits, minimizing recirculation and therefore heat input into the fuel supply system.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: November 6, 2012
    Assignee: Woodward, Inc.
    Inventor: Carthel C. Baker
  • Patent number: 8297311
    Abstract: Apparatus for establishing and controlling a low pressure gas mixture in a vacuum enclosure (8) comprises at least one secondary pump (9) of the molecular, turbomolecular, or hybrid type, followed by at least one primary pump (10), with first control and adjustment means (22) such as a regulation valve (24) for controlling and adjusting the total gas pressure of the mixture of gases in the vacuum enclosure (8) as a function of a total pressure setpoint (27). The apparatus further comprises second control and adjustment means (28) such as a second regulation valve (29a) downstream from the secondary pump (9). The second regulation valve (29a) is controlled as a function of a delivery pressure setpoint (32) to modify the delivery pressure of the secondary pump (9) and thus to adapt its pumping capacity in selective manner.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: October 30, 2012
    Assignee: Alcatel
    Inventors: Jean-Pierre Desbiolles, Michel Puech
  • 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: 8256222
    Abstract: A fuel supply system includes a fuel metering pump and a servo-flow pump that are used to supply fuel to one or more fuel manifolds and one or more fluid-operated actuators, respectively. The fuel metering pump and the servo-flow pump are driven by the same electric motor(s).
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: September 4, 2012
    Assignee: Honeywell International Inc.
    Inventors: Timothy D. Mahoney, Larry A. Portolese
  • Patent number: 8241013
    Abstract: Embodiments of the present invention are directed to devices and methods for propelling fluids that feature at least one first pump assembly having a primary pump, an accumulator pump, drive means, valve means and control means. The valve means moves between the first position and the second position as the accumulator pump and primary pump alternate between a loading movement and a pump movement. The control means is in signal communication with the accumulator pump, the primary pump and the valve means. The control means issues signal command to the accumulator pump to assume the loading movement and the pump movement and the primary pump to assume the loading movement and pump movement in coordination with the movement of the valve means such that fluids are propelled from the first outlet.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: August 14, 2012
    Assignee: Waters Technologies Corporation
    Inventors: Mark W. Moeller, Daniel J. McCormick, Joseph A. Luongo
  • Patent number: 8206134
    Abstract: A power pack unit includes a first hydraulic pump including a first pump enclosure accommodating a first pump cartridge. A second hydraulic pump includes a second pump enclosure accommodating a second pump cartridge. A hydraulic fluid reservoir is positioned between the first and second hydraulic pumps. A first end of the reservoir is secured to the first pump enclosure and a second end of the reservoir is secured to the second pump enclosure. The first and second hydraulic pumps and the reservoir can extend along a common axis. First and second motors can be connected to the first and second pumps. The entire structure can extend along a common axis.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: June 26, 2012
    Assignee: Maradyne Corporation
    Inventors: Ion Moldovan, Paul Ellsworth
  • Publication number: 20120156005
    Abstract: A method of providing buffer air to a labyrinth seal includes operating a multi-stage compressor system having an earlier stage and a later stage such that the air pressure at the later stage is higher than the air pressure at the earlier stage. The method may further include selectively directing compressed air from one of the earlier stage or the later stage to the seal based on a parameter indicative of air pressure within the compressor system.
    Type: Application
    Filed: December 16, 2010
    Publication date: June 21, 2012
    Inventors: ENGWARD WILLIAM NIELSEN, Daniel William Burnes, Simon Ferguson Reynolds, Michael Dennison Fox
  • Publication number: 20120134848
    Abstract: A hydraulic fan circuit is disclosed. The hydraulic fan circuit may have a primary pump, a high-pressure passage fluidly connected to the primary pump, and a low-pressure passage fluidly connected to the primary pump. The hydraulic fan circuit may also have at least one accumulator in selective fluid communication with at least one of the high- and low-pressure passages, a motor, and a fan connected to the motor. The hydraulic fan circuit may further have a fan isolation valve fluidly connected to the high- and low-pressure passages. The fan isolation valve may be movable between a flow-passing position at which the motor is fluidly connected to the primary pump via the high- and low-pressure passages, and a flow-blocking position at which the motor is substantially isolated from the primary pump.
    Type: Application
    Filed: November 30, 2010
    Publication date: May 31, 2012
    Inventors: Bryan E. Nelson, Jeremy T. Peterson, Jeffrey L. Kuehn
  • Patent number: 8166765
    Abstract: A fuel delivery and control system is provided including a dual pump fluid circuit configuration comprising a fixed positive displacement pump sized to supply the main engine burn flow ranging from above windmill through cruise and a variable displacement pump sized to supply fluid to engine actuators, valves and other hydraulically operated engine components with a pump flow sharing system interconnecting the two pumps. The combined flow from the two pumps is sufficient to meet the engine flow demand for windmill relight and maximum flow conditions. During cruise or normal operating conditions, the pumps operate in completely isolated flow circuits, minimizing recirculation and therefore heat input into the fuel supply system.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: May 1, 2012
    Assignee: Woodward, Inc.
    Inventors: Carthel C. Baker, Joe F. Wollschlager
  • Publication number: 20120070318
    Abstract: An oil pump unit with a variable flow rate includes lubrication pumps and a control pump that are driven by rotation of a crankshaft of an engine, and changes an oil supply amount from the control pump to each part of the engine, in which the control pump includes a plurality of oil pumps that have different discharge rates.
    Type: Application
    Filed: September 9, 2011
    Publication date: March 22, 2012
    Applicants: HONDA MOTOR CO., LTD., YAMADA MANUFACTURING CO., LTD.
    Inventors: Keiichi Kai, Junichi Miyajima, Noriyuki Kawamata, Toshimasa Mitsubori, Satoshi Ino
  • Publication number: 20110318195
    Abstract: The present invention relates to a pump arrangement comprising two pump units, each pump unit comprising a pumping cylinder, a reciprocally movable pumping piston, said pumping piston delimiting a pumping chamber in the pumping cylinder in communication with a pump port for fluids, an actuator connected to the pumping piston, and means for determining a value dependent on the position of the pumping piston in the pumping cylinder, said pump arrangement further comprises a first set of valves connecting the pump port of each pump unit to a source line and a delivery line for pumped fluids, wherein the pump arrangement comprises means for regulating the flow of the pumped fluids based on the value dependent on the positions of the pumping pistons in the pump units. The present invention further relates to a system comprising such a pump arrangement and a method for pumping fluids in said pump arrangement.
    Type: Application
    Filed: December 18, 2009
    Publication date: December 29, 2011
    Applicant: ALFA LAVAL CORPORATE AB
    Inventors: Erik Cardelius, Svante Bahrton, Markus Eklund, Kasper Höglund
  • Publication number: 20110262287
    Abstract: A hydraulic pump controlling apparatus of a construction machine according to the present disclosure includes: a hydraulic pump in which a swash plate angle is controlled to control a discharge flow; an auxiliary pump; a control valve controlling a flowing direction of a fluid discharged from the hydraulic pump and selectively supplying the fluid to an actuator; an orifice and a relief valve connected between a center bypass line of the control valve and a tank T to be parallel to each other; signal pressure selecting units receiving a fluid passing through the center bypass line of the control valve and a fluid discharged from the auxiliary pump, and selecting the pressure of any one of the fluids as a signal pressure; and a regulator receiving the signal pressure selected from the signal pressure selecting units to control the swash plate angle of the hydraulic pump, and the signal pressure selecting unit selects the pressure of the fluid discharged from the auxiliary pump as the signal pressure and transfe
    Type: Application
    Filed: December 23, 2009
    Publication date: October 27, 2011
    Applicant: DOOSAN INFRACORE CO., LTD.
    Inventors: Young Sik Cho, Dal Sik Jang
  • Patent number: 8038416
    Abstract: A device including a first discharge passage from a first rotor assembly to an engine, a first return passage that returns to an intake side of the first rotor assembly, a second discharge passage from a second rotor assembly to the engine, a second return passage that returns to an intake side of the second rotor assembly, and a pressure control valve whose valve main body is provided between a discharge port from the second rotor assembly and the first discharge passage. The first discharge passage and the second discharge passage are coupled, and a flow passage control is executed in each of: a low revolution range; an intermediate revolution range; and a high revolution range.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: October 18, 2011
    Assignee: Yamada Manufacturing Co., Ltd.
    Inventors: Yasunori Ono, Keiichi Kai, Kenichi Fujiki, Kosuke Yamane
  • Patent number: 7988431
    Abstract: A variable capacity rotary compressor is provided, in which a vane may be restricted by a pressure difference generated between both side surfaces of the vane when the compressor performs in a saving driving mode. The vane may be restricted quickly and stably by rapidly decreasing a pressure of a vane chamber by leaking a discharge pressure of the vane chamber to an inlet via a low pressure passage and thereby increasing a pressurizing force applied to a side surface of the vane relatively greater than a supporting force applied to a rear surface thereof. In this way, the vane may be prevented from being vibrated due to a weak restriction force of the vane when a power driving mode of the compressor is switched into the saving driving mode, which prevents noise from increasing due to design conditions, thereby enhancing a comfort feeling of a user.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: August 2, 2011
    Assignee: LG Electronics Inc.
    Inventors: Sang Myung Byun, Jeong Min Han, Jeong Hun Kim
  • Publication number: 20110142690
    Abstract: A pump apparatus configured with a first pump for pumping working fluid in accordance with a reciprocation of a piston using a space between a first open/close valve for suction and a second open/close valve for discharge as a pump chamber. The pump apparatus is also configured a first flow passage for supplying the working fluid from a supply source to an operation subject via the first open/close valve, the pump chamber, and the second open/close valve in accordance with an operation of the first pump. A second flow passage supplies the working fluid pumped by a second pump, which is different from the first pump, to the pump chamber. A selector is configured to select either the first flow passage or the second flow passage.
    Type: Application
    Filed: December 2, 2010
    Publication date: June 16, 2011
    Applicant: AISIN AW CO., LTD.
    Inventors: Tetsuya SHIMIZU, Kazuhiko KATO, Kazunori ISHIKAWA, Noriomi FUJII
  • Publication number: 20110123361
    Abstract: Disclosed is a variable capacity type rotary compressor, in which a refrigerant sucked via one suction pipe can be alternately sucked into each compression space via a communication passage between a plurality of cylinders so as to reduce the number of components and the number of assembly processes, thereby remarkably reducing a fabricating cost, a refrigerant within an idling cylinder can be prevented from flowing back into another cylinder so as to improve the performance of the compressor, a welding space can be ensured when connecting connection pipes so as to realize a welding automation, thereby further reducing the fabricating cost, and a mode switching valve can be stably fixed to an appropriate position so as to attenuate noise due to vibration of the compressor.
    Type: Application
    Filed: July 22, 2009
    Publication date: May 26, 2011
    Inventors: Sang-Myung Byun, Sang-Mo Kim
  • Patent number: 7942645
    Abstract: An oil pump assembly includes a plurality of pump chambers constituting a plurality of oil pumps, respectively, a plurality of rotors are fitted into the pump chambers, respectively, with a single driving shaft carrying the plurality of rotors to form a single body. Oil pumped up from an oil pan is supplied under pressure to different associated destinations with the relief valves being arranged compactly to reduce the size of the oil pump assembly. Oil pumps are provided with respective relief valves provided to pass oil discharged from the corresponding pump chambers therethrough and the axes of the relief valves are arranged parallel to the driving shaft. A driving shaft is provided on which a plurality of the inner rotors are carried concentrically and integrally. The rotors are connected to the driving shaft and changed depending on discharge oil pressures, thereby preventing the driving shaft from increasing its diameter.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: May 17, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Masahiko Nakatsuka, Masaki Cho
  • Patent number: 7942649
    Abstract: An electrical driven pump unit having two hydraulic pumps and two electric motors that are fitted in such a way as to make it possible to obtain the unit's power by adding together the power of the two motors.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: May 17, 2011
    Assignee: JTEKT HPI
    Inventors: Nicaïse Lesther, Francois Fischer
  • Patent number: 7918655
    Abstract: A compressor control system includes at least one variable compressor, at least one fixed-capacity compressor, and a controller. The controller modulates the variable compressor based on a suction pressure reading of the variable compressor. In addition, the controller selectively toggles the fixed-capacity compressor between a run mode and a shutdown mode based on an operating parameter of the variable compressor.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: April 5, 2011
    Assignee: Computer Process Controls, Inc.
    Inventors: Ernest P. Hurst, Jr., Hung M. Pham
  • 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
  • Patent number: 7849679
    Abstract: A fuel delivery system for a combustion engine is provided. The fuel delivery system includes an exhaust treatment device, a fuel injection unit, a fuel supply, and a fuel pump. The fuel pump includes at least one inlet configured to receive fuel from the fuel supply. A first fixed-output pumping element is configured to generate a first fuel flow at a first pressure and a first flow rate. A second fixed-output pumping element is configured to generate a second fuel flow at a second pressure and a second flow rate. At least one of the second pressure and the second flow rate is different from the first pressure and the first flow rate. A first outlet is configured to direct the first fuel flow to the fuel injection unit. A second outlet is configured to direct the second fuel flow to the exhaust treatment device.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: December 14, 2010
    Assignee: Caterpillar Inc
    Inventors: Drew Christopher Donnelli, Ye Tian, Joseph Shane Burkitt
  • Patent number: 7793685
    Abstract: Apparatus for establishing and controlling a low pressure gas mixture in a vacuum enclosure (8) comprises at least one secondary pump (9) of the molecular, turbomolecular, or hybrid type, followed by at least one primary pump (10), with first control and adjustment means (22) such as a regulation valve (24) for controlling and adjusting the total gas pressure of the mixture of gases in the vacuum enclosure (8) as a function of a total pressure setpoint (27). The apparatus further comprises second control and adjustment means (28) such as a second regulation valve (29a) downstream from the secondary pump (9). The second regulation valve (29a) is controlled as a function of a delivery pressure setpoint (32) to modify the delivery pressure of the secondary pump (9) and thus to adapt its pumping capacity in selective manner.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: September 14, 2010
    Assignee: Alcatel
    Inventors: Jean-Pierre Desbiolles, Michel Puech