Expansible Chamber Pump Distributor Operation Modified Patents (Class 417/297)
  • Patent number: 10359044
    Abstract: A compressor system is disclosed. The compressor system includes a motor, a compressor driven by the motor, a first after cooler, a second after cooler, and a heat exchanger housed in an enclosure. Interior panels are arranged in the enclosure to separate the motor and compressor, the first after cooler, the second after cooler, and the heat exchanger from one another. Conduit extends through the interior panels to provide a fluid path between the compressor, the first after cooler, the second after cooler, and the heat exchanger. Ducting is provided in the enclosure to provide fluid communication between various components of the compressor system.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: July 23, 2019
    Assignee: Powerex/Scott Fetzer Company
    Inventors: Ryosuke Kawano, Joseph Anton Abt
  • Patent number: 9976641
    Abstract: A hydraulic transmission comprising a variable displacement pump and motor, at least one having cylinders having valves which are controllable on each cycle of cylinder working volume to determine the net displacement of working fluid by the cylinder. The transmission has a valve control module which determines a displacement of the pump and the motor by specifying a displacement demand. The pump and/or motor valve control module determine the frequency of intensity peaks in the frequency spectrum of the pattern of cylinders carrying out active and inactive cycles of cylinder working volume using a first procedure and, if these will fall within disallowed frequency bands including the resonant frequency of components with which the transmission is in mechanical communication, the displacement demand, or another input, is periodically modified to suppress generation of those frequencies. The hydraulic transmission is useful for example in a wind turbine generator, or a vehicle.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: May 22, 2018
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Niall Caldwell, Daniel Abrahams, Daniil Dumnov
  • Patent number: 9255580
    Abstract: Certain embodiments of the disclosure may include systems, methods and apparatus for operating and validating a compressor. According to an example embodiment of the disclosure, a method is provided for validating compressor operation. The method can include receiving compressor operating parameter data from a plurality of sensors; and adjusting a portion of a variable flow area downstream of a compressor discharge to achieve a desired compressor pressure ratio.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: February 9, 2016
    Assignee: General Electric Company
    Inventors: Daniel Richard Waugh, Karl Dean Minto, Scott William Szepek, Louis Veltre
  • Publication number: 20150139826
    Abstract: Cam actuated valves for compressors including mechanisms for changing an instant when the cam actuated valve is opened and/or a time interval during which the cam actuated valve is in an open state within the time range of a compression cycle. A reciprocating compressor has: a body including a compression chamber; a cam having an oblong portion, being located inside the body and being configured to be rotated around a rotation axis, to perform a rotation during each compression cycle; an actuating element located inside the body and configured to receive a linear displacement or an angular displacement due to the oblong portion of the cam; and a valve located on a flow path of the fluid toward or from the compression chamber and configured to be switched to an open state by the actuating element. The reciprocating compressor also includes a controller configured to adjust timing of the valve.
    Type: Application
    Filed: May 1, 2013
    Publication date: May 21, 2015
    Inventors: Riccardo Bagagli, Leonardo Tognarelli
  • Patent number: 8838306
    Abstract: In a method and a device for operating a drive unit, a first output variable of the drive unit is restricted; a setpoint value of a second output variable of the drive unit is specified; and an actual value of the second output variable of the drive unit is determined. The setpoint value is compared with the actual value, and if it is determined that the actual value does not exceed the setpoint value, then the first output variable is restricted to a first value. If it is determined that the actual value exceeds the setpoint value, then the first output variable is restricted to a second value smaller than the first value.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: September 16, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Guenter Kettenacker, Christian Ruland, Klaus Schwarze
  • Patent number: 8678779
    Abstract: A high pressure fuel pump for use with a direct injection engine having a housing which defines a pump chamber. A port is formed in the housing which fluidly connects a fuel in the passageway with the pump chamber. An elongated valve is movably mounted within the housing between an open and a closed position. In its open position, the inlet passageway is fluidly connected with the pump chamber while, conversely, in the closed position the fuel valve blocks the fluid flow between the inlet passageway and the pump chamber. A circuit controls the deceleration of the valve to reduce pump noise.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: March 25, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Yoshizawa, Donald J. McCune, Harsha Badarinarayan, Akira Inoue
  • Patent number: 8651827
    Abstract: A lead line weld joined portion is disposed externally of a magnetic circuit, i.e., of a yoke portion. This allows generation of a sufficient magnetic biasing force between a first core portion and the anchor.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: February 18, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Satoshi Usui, Katsumi Miyazaki, Hiroyuki Yamada, Shingo Tamura
  • Patent number: 8556225
    Abstract: The present invention involves, in some embodiments, pump chambers are configured to prevent contact of at least a portion of a membrane movable within the pump chamber to effect pumping from contacting an inner wall of the pump chamber, which can, in some embodiments, be useful to prevent any gas in the pump chamber from being pumped from the pump chamber during pumping. The pump chambers and pumping cartridges may form part of a pumping system further comprising valve(s) and a controller configured to detect and purge gas from the pump chamber.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: October 15, 2013
    Assignee: DEKA Products Limited Partnership
    Inventor: Larry B. Gray
  • Publication number: 20120177510
    Abstract: A check valve is disclosed that includes a base having a porous first surface, a keeper coupled to the base, and a flexible leaf with a first section that is fixedly coupled between the keeper and the base and a second section that is cantilevered from the first section. The leaf has a first position when the leaf is fully in contact with the base and a second position when the leaf is fully in contact with the keeper. The leaf is configured to sealingly cover the porous first surface when the leaf is in the first position. The leaf is in an unstressed configuration when in the first position, and a maximum stress in the leaf is less than the yield stress when the leaf is in the second position. The check valve is particularly suited for use with cryogenic fluids such as liquid hydrogen and liquid oxygen.
    Type: Application
    Filed: January 6, 2012
    Publication date: July 12, 2012
    Applicant: XCOR Aerospace, Inc.
    Inventors: Daniel L. DELONG, Michael E. VALANT, Jeffrey K. GREASON
  • Patent number: 8192176
    Abstract: A hydraulic fluid supply system includes an active pressure regulator or feed limit valve with a flow cut-off which may be used with dual clutch transmission hydraulic control systems. The supply system includes a pump, a filter, pressure relief and filter bypass valves, an accumulator, a system pressure sensor and the active feed limit valve. The active feed limit and flow cut-off valve includes an on-off solenoid valve and a spool or logic valve having an inlet port, an outlet port, a control port, a feedback port and an exhaust port. The inlet port is supplied with pressurized hydraulic fluid and the control port is supplied with hydraulic fluid from the solenoid control valve when it is energized. A valve spool having a pair of spaced-apart lands is biased toward the control port. One side of a check valve is in fluid communication with the feedback port.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: June 5, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Philip C. Lundberg, Bret M. Olson
  • Publication number: 20120121443
    Abstract: An air compressor includes a cylinder housing, an outlet receptacle disposed on the cylinder housing, and a partition formed between the cylinder housing and the outlet receptacle and having an air passage formed in the partition, a piston slidably received in the cylinder housing and coupled to a motor for moving relative to the cylinder housing in a reciprocating action in order to generate a pressurized air, and a spring-biased check valve engaged with the partition for selectively blocking the air passage of the partition, the outlet receptacle includes an inner diameter “D2” no less than an inner diameter “D1” of the cylinder housing for allowing the pressurized air to easily flow into the outlet receptacle and for allowing the piston to be moved in a greater moving speed.
    Type: Application
    Filed: November 16, 2010
    Publication date: May 17, 2012
    Inventor: Wen San Chou
  • Patent number: 8128378
    Abstract: A system and method is provided for controlling a variable displacement piston pump that supplies fluid to one or more loads. If fluid is being supplied through a metering valve to a load, then the variable displacement piston pump is controlled to operate in accordance with a variable flow/variable discharge pressure scheme. However, if fluid is not being supplied through the metering valve to the load, then the variable displacement piston pump is controlled to operate in accordance with a variable flow/constant discharge pressure scheme.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: March 6, 2012
    Assignee: Honeywell International Inc.
    Inventors: William Scott Rowan, Larry Portolese, Brad McRoberts, George Wieger
  • Patent number: 7993110
    Abstract: A gas/air compressor system used for compressing a gas/air stream of air, oxygen, oxygen-enriched air and other combustible gases and delivering a moderate-to-high temperature, moderate-to-high pressure fluid to a pipeline connected to one or more injection wells. Fuel with cooling water is injected downhole for combustion in the compressed gas/air stream to be used for in-situ-retorting of oil shale, volatile coal beds, tar sands, heavy oil and other hydrocarbon or carbonaceous deposits. A preferred embodiment of the compressor system includes a compressor housing with a male screw rotor having helical lobes received in helical grooves in a female screw rotor. The housing includes a gas/air inlet for receiving the gas/air stream therein and a series of water/mineral injectors for injecting a water/mineral slurry into the rotating screw rotors. The water/mineral slurry acts as a sealant, a lubricant and also a coolant for male and female screw rotors during the compression cycle.
    Type: Grant
    Filed: September 8, 2007
    Date of Patent: August 9, 2011
    Inventor: Gilman A. Hill
  • Publication number: 20110091335
    Abstract: Methods and apparatus are provided for determining pump fillage, using data arrays of pump plunger position with respect to time and/or pump plunger load with respect to time. In this manner, well operators may be able to accurately monitor the pump fillage and control the pump accordingly.
    Type: Application
    Filed: March 8, 2010
    Publication date: April 21, 2011
    Inventors: VICTORIA M. EHIMEAKHE, Ken George Booth
  • Patent number: 7789634
    Abstract: A reed valve and a valve retainer for the reed valve are provided at a discharge port of a compression mechanism that compresses fluid. The valve retainer has a polymer actuator at an end part of a valve fixing part for fixing the reed valve. The polymer actuator expands or contracts in length to change a fixed length of the reed valve, thereby changing a rigidity of the reed valve. This attains appropriate control of responsiveness of the reed valve according to the volume.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: September 7, 2010
    Assignee: Daikin Industries, Ltd.
    Inventors: Hirofumi Higashi, Masanori Masuda, Katsumi Sakitani
  • Patent number: 7628590
    Abstract: A technique for reducing the risk of free flow through a pump is disclosed. The technique includes sensing a pressure difference between the pump inlet and outlet. The pressure difference is mechanically communicated to a flow restricting element. The flow restricting element increases resistance to flow exiting the pump outlet in a relation to the pressure difference present between the pump inlet and pump outlet.
    Type: Grant
    Filed: February 16, 2005
    Date of Patent: December 8, 2009
    Assignee: Sterling Investments LC
    Inventors: Stephen C. Jacobsen, Jon Beck, Christopher Brydon
  • Patent number: 7625190
    Abstract: The present invention involves several different embodiments related to a crossover switching valve. The crossover switching valve is preferably designed to receive fluid from a reservoir, or other fluid source, and direct the inflow and outflow of the fluid between the valve and one or more pumps. In one embodiment, the valve is configured to provide a substantially continuous flow rate when used in connection with a double acting pump. In another embodiment, the valve preferably includes an inflow port, an outflow port, and first and second ports configured to be fluidly connected to at least one pump. Another embodiment of the present invention is a conduit that preferably provides fluid communication between the first and second ports. Yet another embodiment is a fluid director that is preferably configured to alter flow of fluid through the conduit. In some embodiments, the inflow port is in fluid communication with the first port while the outflow port is in fluid communication with the second port.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: December 1, 2009
    Assignee: K.R. Anderson, Inc.
    Inventor: Steve C. Smith
  • Patent number: 7059838
    Abstract: A control device for a positive displacement pump includes a throttle device and a flow control valve. The flow control valve includes a flow control piston and is configured to regulate an unrequired excess flow of the pump at an increased speed. The throttle device is configured to produce a speed-related pressure differential in a bore section, the pressure differential being responsible for the displacement of the flow control valve and the throttle device. The throttle device is arranged in the pressure outlet (bore section) of the pump and includes a regulating pin connected to the flow control piston, having a control contour configured so that a modifiable through cross-section is created in association with a throttle bore. The control pin has a wider section in an axial displacement area of the throttle device, the area not being involved in control of the volume flow, whereby a minimum obturating section arises in the displacement area.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: June 13, 2006
    Assignee: ZF Lenksysteme GmbH
    Inventors: Günter Draskovits, Gerhard Zimmermann
  • Patent number: 7048801
    Abstract: A chemical pump includes a pressure chamber, a partition member for dividing the pressure chamber into a cleaning pressure chamber and a discharging pressure chamber, a filter part disposed on the primary side of the discharging pressure chamber, and a single drive mechanism. A pair of openings with respective check valves mounted therein are provided in each of the cleaning and discharging pressure chambers, and are positioned so as to cause a resist solution to flow only in the +Z direction. The drive mechanism moves the partition member in the ?X direction to cause the resist solution to be sucked into the cleaning pressure chamber and to cause the resist solution to be discharged from the discharging pressure chamber.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: May 23, 2006
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventor: Akihiko Morita
  • Patent number: 6984113
    Abstract: An oil pressure operated pump for marine steering gears includes a multiple piston oil pressure operated pump controlled by a steering wheel, a valve housing mounted under the pump, a bottom cover closing the valve, the valve housing and the cover each including channels, threaded holes for reciprocal fastening thereof, non-threaded bores for oil pressure connections, a valve set lodged in the valve housing for non-return and adjustment of oil flow, the valve set including a generally parallelepiped shaped tubular shell having a generally external square shape, a central tubular through-hole, and lathe-turned ducts, a double acting oil pressure cylinder including a shaft movable in the central tubular through-hole for controlling a direction of an engine or rudder of a boat, and valves for controlling fluid flow and thereby movement of the shaft.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: January 10, 2006
    Assignee: Ultraflex S.p.A.
    Inventor: Giorgio Gai
  • Patent number: 6948915
    Abstract: A screw compressor includes a compressor main body, a male rotor having a screw-like male tooth shape and a female rotor having a screw-like female tooth shape meshing with the screw-like male tooth shape or the male rotor. The male and female motors are provided within the compressor main body. A motor casing is operably connected to the compressor main body, and a high speed electric motor provided within the motor casing. The motor includes a motor rotor, a motor stator and a motor shaft for driving at least one of the male and female rotors. A speed ratio of the motor shaft and the at least one of the male and female rotors driven by the motor shaft is in a range of 2:1 to 1:2.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: September 27, 2005
    Assignee: Hitachi, Ltd.
    Inventor: Hitoshi Nishimura
  • Patent number: 6935847
    Abstract: A pump assembly for a penile implant is provided having a mechanism which prevents spontaneous inflation of the cylinders implanted within the user. The preventative mechanism uses overpressure generated by the reservoir during unintentional compression to effectively seal the pump assembly from unintended fluid flow. The prevention mechanism itself creates all necessary forces to prevent the undesired fluid flow to the cylinders. This is accomplished by incorporating appropriate mechanisms within the pump itself.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: August 30, 2005
    Assignee: AMS Research Corporation
    Inventors: Charles C. Kuyava, John W. Westrum, Jr., David W. Clark
  • Patent number: 6884041
    Abstract: A solenoid-valve-controlled fuel-injection pump for internal combustion engines, in particular diesel engines, has a solenoid valve, whose valve needle separates a high-pressure region from a low-pressure region, i.e. connects the high-pressure region and low-pressure region, in the pump housing, via a valve seat; the injection period being controlled by the opening of the solenoid valve. In addition, a low-pressure compensating piston situated in the low-pressure region is provided in order to compensate for pressure fluctuations in the low-pressure region. The exceptional feature is that the low-pressure compensating piston, which is positioned coaxially to the solenoid-valve needle, takes the form of a component part that is separate from the solenoid-valve needle. This ensures that the solenoid valve is opened unhindered and as rapidly as possible by the opening force exerted on the solenoid-valve needle by the electromagnet.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: April 26, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Peter Boehland, Andreas Sterr, Andreas Dutt
  • Patent number: 6854962
    Abstract: A pumping system for a fuel injection system includes a body defining a high pressure pumping chamber, a plunger, a high pressure outlet, a high pressure fluid line connecting the pumping chamber to the outlet, a control valve along the fluid line, and a valve and restriction arrangement along the fluid line. The valve and restriction arrangement includes a restriction and a valve body. The valve body is movable between an open position in which fuel flow from the pumping chamber is generally unrestricted by the restriction and a closed position in which fuel flow from the pumping chamber is significantly restricted by the restriction to store energy in the pumping chamber. Advantageously, the high pressure restriction concept may be utilized in a pumping system for various types of rate shaping, including boot injection and square injection, in addition to pilot operation and post injection operations, and others.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: February 15, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Gregg R. Spoolstra, Robert D. Straub
  • Publication number: 20040037711
    Abstract: A screw compressor includes a compressor main body, a male rotor having a screw-like male tooth shape and a female rotor having a screw-like female tooth shape meshing with the screw-like male tooth shape or the male rotor. The male and female motors are provided within the compressor main body. A motor casing is operably connected to the compressor main body, and a high speed electric motor provided within the motor casing. The motor includes a motor rotor, a motor stator and a motor shaft for driving at least one of the male and female rotors. A speed ratio of the motor shaft and the at least one of the male and female rotors driven by the motor shaft is in a range of 2:1 to 1:2.
    Type: Application
    Filed: August 22, 2003
    Publication date: February 26, 2004
    Inventor: Hitoshi Nishimura
  • Publication number: 20030231963
    Abstract: An apparatus and method that controls the opening/closing of a discharge passage of refrigerant in a linear compressor. The apparatus of the present invention includes a discharge passage opening/closing control unit to control an opening/closing rate of the discharge passage through which high-pressure refrigerant generated by a compression operation of the linear compressor is discharged and moved. The method of the present invention includes sensing an operating state of the linear compressor, comparing the sensed information with a preset value and determining whether the operating state of the linear compressor is abnormal, and controlling the discharge passage of the linear compressor if the operating state of the linear compressor is abnormal.
    Type: Application
    Filed: October 18, 2002
    Publication date: December 18, 2003
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: In-Ju Lee, Hyun-Joong Kim
  • Patent number: 6648609
    Abstract: The invention is a device and method in a high-pressure chromatography system, such as a supercritical fluid chromatography (SFC) system, that uses a pump as a pressure source for precision pumping of a compressible fluid. The preferred exemplary embodiment comprises a pressure regulation assembly installed downstream from a compressible fluid pump but prior to combining the compressible flow with a relatively incompressible modifier flow stream. The present invention allows the replacement of an high-grade SFC pump in the compressible fluid flow stream with an inexpensive and imprecise pump. The imprecise pump becomes capable of moving the compressible fluid flow stream in a precise flow rate and pattern. The assembly dampens the damaging effects of an imprecise pump, such as large pressure oscillations caused by flow ripples and noisy pressure signals that do not meet precise SFC pumping requirements.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: November 18, 2003
    Assignee: Berger Instruments, Inc.
    Inventors: Terry A. Berger, Kimber D. Fogelman, Kenneth Klein, L. Thompson Staats, III, Mark Nickerson, Paul F. Bente, III
  • Patent number: 6638030
    Abstract: A screw compressor includes a compressor main body, a male rotor having a screw-like male tooth shape and a female rotor having a screw-like female tooth shape meshing with the screw-like male tooth shape or the male rotor. The male and female motors are provided within the compressor main body. A motor casing is operably connected to the compressor main body, and a high speed electric motor provided within the motor casing. The motor includes a motor rotor, a motor stator and a motor shaft for driving at least one of the male and female rotors. A speed ratio of the motor shaft and the at least one of the male and female rotors driven by the motor shaft is in a range of 2:1 to 1:2.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: October 28, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Hitoshi Nishimura, Akira Suzuki
  • Publication number: 20030190237
    Abstract: The invention is a device and method in a high-pressure chromatography system, such as a supercritical fluid chromatography (SFC) system, that uses a pump as a pressure source for precision pumping of a compressible fluid. The preferred exemplary embodiment comprises a pressure regulation assembly installed downstream from a compressible fluid pump but prior to combining the compressible flow with a relatively incompressible modifier flow stream. The present invention allows the replacement of an high-grade SFC pump in the compressible fluid flow stream with an inexpensive and imprecise pump. The imprecise pump becomes capable of moving the compressible fluid flow stream in a precise flow rate and pattern. The assembly dampens the damaging effects of an imprecise pump, such as large pressure oscillations caused by flow ripples and noisy pressure signals that do not meet precise SFC pumping requirements.
    Type: Application
    Filed: April 5, 2002
    Publication date: October 9, 2003
    Inventors: Terry A. Berger, Kimber D. Fogelman, Kenneth Klein, L. Thompson Staats, Mark Nickerson, Paul F. Bente
  • Patent number: 6626643
    Abstract: An apparatus and method for producing predetermined quantities of a meat product, inc which the apparatus comprises a twin vane concentric pump with an inlet and an outlet circumferentially spaced from one another, and a pair of independently movable vanes. During operation, one of the vanes is positioned between the inlet and outlet to permit pressurization of meat chunks in a chamber communicating with an outlet opening. The other vane is advanced toward the outlet with the outlet valve closed until a predetermined pressure is reached, at which point the outlet valve is opened to dispense a predetermined quantity of meat product. Similar to single vane meat pumps, the disclosed twin vane pump is capable of handling large meat chunks while causing relatively little damage to the chunks.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: September 30, 2003
    Assignee: Handtmann Piereder Machinery Ltd.
    Inventor: Georg Staudenrausch
  • Publication number: 20030156952
    Abstract: Method and system intended for fine proportioning of fluids injected into a pumping installation, allowing to compensate for non-return valve errors.
    Type: Application
    Filed: February 21, 2003
    Publication date: August 21, 2003
    Inventors: Francois Couillard, Daniel Durand
  • Patent number: 6582209
    Abstract: A fuel injection system for internal combustion engines essentially has a high-pressure injection pump, supplied with fuel from a low-pressure region, and a magnetic piston valve serving to control the injection pump. The magnetic valve having two coaxial valve chambers, communicating with one another through a valve opening but separable from one another by a valve seat, and an armature chamber. The armature chamber communicates with the inlet side via a pressure conduit, and the low-pressure valve chamber communicates with the outlet region of the injection pump. The low-pressure valve chamber has a fuel inlet conduit and a fuel outlet conduit, both of which have a gradually tapered cross section compared to the cross section of the remaining regions of the fuel inlet conduit and fuel outlet conduit. Maximal prevention of cavitation is successfully achieved in the region of the low-pressure valve chamber and hence cavitation erosion that is possible as a consequence of cavitation.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: June 24, 2003
    Assignee: Robert Bosch GmbH
    Inventor: Nestor Rodriguez-Amaya
  • Patent number: 6506027
    Abstract: A helical screw compressor is provided having a first compressor stage and a second compressor stage. The helical screw compressor includes a first male rotor and a first female rotor in the first compressor stage, and a second male rotor and a second female rotor in the second compressor stage. A connecting duct is provided between an outlet of the first compressor stage and an inlet of the second compressor stage, and a conduit is provided having a first end communicating with the connecting duct and a second end branching off into a first line and a second line. The first line is coupled to the first compressor stage for injecting liquid into the first compressor stage, and the second line is coupled to the second compressor stage for injecting liquid into the second compressor stage.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: January 14, 2003
    Assignee: Svenska Rotor Maskiner AB
    Inventor: Karlis Timuska
  • Publication number: 20020192085
    Abstract: The invention concerns a device for varying the dosage of an additive (A) in a main flow (P) of liquid, the proportioning being provided by a pump (1) driven by the main flow, the pump comprising a first intake (2) for the main flow, a second intake (3) for the additive and an outlet for the dosed mixture. A branch pipe (5) of the main flow is provided between a zone (6) located upstream of the first intake (2) and a zone (7) located downstream of the outlet (4), so as to enable a parallel flow not comprising the additive. Periodic control means (C) for the branch pipe (5) and the first intake (2) of the pump are also provided so that each control period comprises at least a phase (Ud1) for which the branch pipe (5) is open and the first intake (2) is closed, and another phase (Ud2) for which the branch pipe (5) is closed while the first intake (2) is open.
    Type: Application
    Filed: July 26, 2002
    Publication date: December 19, 2002
    Inventor: Stephane Urrutia
  • Patent number: 6471492
    Abstract: An oil free screw compressor includes a compressor main body directly connected to a high speed motor via a drive side gear and a driven side gear having a uniform speed ratio. A bearing in a side of the high speed motor employs one having the same size as that of a bearing in a side of the compressor main body. The same material as a viscous seal provided at both end portions of a male rotor and a female rotor is used for a viscous seal provided at both end portions of a motor shaft. The high speed motor is driven by a high frequency type inverter. The electric motor side and the compressor main body side are made in a rotational shaft structure which is dummy symmetrical about a uniform gear portion.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: October 29, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Hitoshi Nishimura, Akira Suzuki
  • Patent number: 6464470
    Abstract: A variable size is provided for a discharge port in a scroll compressor. The variable size is movable dependent on conditions within the scroll compressor to achieve a desired pressure ratio based upon operational conditions in the compressor or an associated refrigerant cycle. In one embodiment a plunger moves axially to increase or decrease the size of a discharge port. In a second embodiment, the plunger rotates about an axis and has a groove that is selectively aligned with the port to increase or decrease the effective size of the port.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: October 15, 2002
    Assignee: Scroll Technologies
    Inventors: Carlos Zamudio, Joe T. Hill, Gregory W. Hahn, Zili Sun, Jason Hugenroth, Thomas Barito, John R. Williams, James W. Bush
  • Patent number: 6447263
    Abstract: A fuel pump includes a pumping plunger reciprocable within a bore formed in a pump housing under the influence of a cam drive arrangement. The cam drive arrangement includes a reciprocable tappet member, a surface associated with the tappet member defining, in part, an auxiliary pumping chamber. A flow path interconnects the auxiliary pumping chamber and the bore such that fuel displaced from the auxiliary pumping chamber, in use, can be supplied through the flow path to the bore.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: September 10, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: Michael Peter Cooke, John Roderick Jefferson
  • Publication number: 20020119053
    Abstract: A fluid pump is provided that produces an outflow of fluid that is not proportional to the speed of the input drive. Thus, the fluid pump can be tuned to provide a substantially constant outflow of fluid irrespective of the speed of the input drive. The fluid pump also provides fluid outflow when the rotational direction of the input drive is reversed.
    Type: Application
    Filed: February 27, 2001
    Publication date: August 29, 2002
    Inventor: James A. Thomas
  • 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: 6416299
    Abstract: A motorcycle oil pump that provides a fixed shaft with high volume rotor gears and adjustable oil pressure.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: July 9, 2002
    Inventors: Bryon A. Patrick, Cole Fife
  • Patent number: 6345959
    Abstract: A fluid pump has a housing (4), a main output port (10), an auxiliary output port (14) and a priority pressure regulating valve contained with the housing (4). The priority pressure regulating valve has a spool (20) to direct fluid to one or both of the of the output ports (10,14), a force means (34,36) associated with the spool to bias the spool (20) to a position where it causes fluid to flow to the main output port (10) exclusively, and a pressure release means (40) which enables the spool (20) to move to a position where it permits fluid to flow to the auxiliary output port (14) when the pressure at the main output port (10) is at or greater than a predetermined pressure.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: February 12, 2002
    Assignee: Sauer-Danfoss (Swindon) Limited
    Inventor: Roderick Howell Spurry
  • Patent number: 6312232
    Abstract: A compressor includes a discharge chamber into which pressurized refrigerant gas is intermittently discharged. The pressurized refrigerant gas in the discharge chamber is sent to an external refrigerant circuit. A chamber for accommodating a resonance suppressing adapter is located between a discharge muffler and the external refrigerant circuit. The adapter includes a float valve and a spring. The float valve can move between a position connecting the accommodation chamber to the muffler and a position disconnecting the accommodation chamber from the muffler. The spring urges the float valve to its closed position. The force of the spring is determined such that the discharge pulse frequency of the refrigerant gas does not coincide with the natural resonance frequency of the external refrigerant circuit or at least such that the amplitude of pressure variations of the refrigerant gas is reduced.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: November 6, 2001
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Hideo Mori, Toshiyuki Mizuno, Toshihiro Kawai, Atsuko Yoshizumi
  • Publication number: 20010022938
    Abstract: To protect a turbocompressor (3) with a downstream process from operation in the unstable working range, a machine controller is used, which optionally contains—besides a surge limit controller (15)—an intake pressure controller (11), an end pressure controller (20) and a bypass controller (9). A control matrix is determined from the position of a control unit (fuel gas control valve 6) determining the flow to the process, optionally taking into account additional influencing variables such as the compressor intake pressure and the compressor discharge pressure.
    Type: Application
    Filed: March 9, 2001
    Publication date: September 20, 2001
    Inventor: Wilfried Blotenberg
  • Publication number: 20010021349
    Abstract: An oil free screw compressor includes a compressor main body directly connected to a high speed motor via a drive side gear and a driven side gear having a uniform speed ratio. A bearing in a side of the high speed motor employs one having the same size as that of a bearing in a side of the compressor main body. The same material as a viscous seal provided at both end portions of a male rotor and a female rotor is used for a viscous seal provided at both end portions of a motor shaft. The high speed motor is driven by a high frequency type inverter. The electric motor side and the compressor main body side are made in a rotational shaft structure which is dummy symmetrical about a uniform gear portion.
    Type: Application
    Filed: April 9, 2001
    Publication date: September 13, 2001
    Inventor: Hitoshi Nishimura
  • Patent number: 6287088
    Abstract: An oil free screw compressor includes a compressor main body directly connected to a high speed motor via a drive side gear and a driven side gear having a uniform speed ratio. A bearing in a side of the high speed motor employs one having the same size as that of a bearing in a side of the compressor main body. The same material as a viscous seal provided at both end portions of a male rotor and a female rotor is used for a viscous seal provided at both end portions of a motor shaft. The high speed motor is driven by a high frequency type inverter. The electric motor side and the compressor main body side are made in a rotational shaft structure which is dummy symmetrical about a uniform gear portion. In the oil free screw compressor, a speed increasing apparatus for increasing an output of an electric motor and a suction throttle valve are not required. Then, parts in the compressor main body side and parts in the electric motor side are made common, and a structure is made simple.
    Type: Grant
    Filed: September 16, 1999
    Date of Patent: September 11, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Hitoshi Nishimura, Akira Suzuki
  • Patent number: 6261068
    Abstract: A gas compressor includes a compression chamber, an outlet valve, and a shuttle valve which disables the outlet valve when it is connected to an atmospheric pressure relief chamber in idle operation. A throttle line circumventing the shuttle valve is provided which permits by-passed flow between the compression chamber and the atmospheric pressure relief chamber in idle operation, thereby preventing deposits and moisture condensation in the downstream flow path to the pressure relief chamber due to the disabling of the outlet valve, which might otherwise lead to possible operational malfunctions. Compressed-air systems employed in the automotive industry represent an important area of application for the invention.
    Type: Grant
    Filed: October 11, 1999
    Date of Patent: July 17, 2001
    Assignee: Wabco GmbH
    Inventors: Manfred Kramer, Heinrich Schlossarczyk, Karl-Heinrich Schönfeld
  • Patent number: 6238190
    Abstract: A fuel injector pump for an internal combustion engine including a camshaft-driven fuel delivery plunger, a solenoid valve for controlling transfer of liquid fuel from a fuel plunger cavity to a fuel injector nozzle, and a snubber valve located between the fuel injector nozzle and the plunger whereby unrestricted fuel flow is distributed to the injector nozzle and reverse flow from the nozzle to the plunger chamber is restricted so that cavitation in the fuel delivery passage extending to the nozzle will be avoided and undesirable pressure peaks at the fuel pump are avoided.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: May 29, 2001
    Assignee: Diesel Technology Company
    Inventors: Philip James Czarnecki, Daniel Brian Ogren, Scott Weliver
  • Patent number: 6149384
    Abstract: A centrifugal pump has a casing, an overhung-mounted rotor in the casing having a feed chamber, which centrifugally accelerates the liquid flowing centrally to it, and a discharge chamber positioned axially behind it and connected to the feed chamber in the vicinity of the inner circumference of the rotor, as well as a scoop pipe guided centrally into the discharge chamber close to the inner circumference thereof and by means of which the liquid is discharged. For the discharge of liquids from a vacuum chamber, the discharge chamber is connected by means of a line centrally introduced into it to the gas phase of the vacuum chamber, so that the liquid flowing in via the feed chamber forms on its inner circumference a liquid ring, into which is immersed the feed end of the scoop pipe, and that on the drain side the scoop pipe is closed by an automatically closing valve, which opens under the operating pressure.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: November 21, 2000
    Inventor: Vaclav Feres
  • Patent number: 6126409
    Abstract: A manifold assembly includes a housing unit which has a check valve assembly and a pressure relief valve assembly formed in one integral unit. When the check valve is in a closed position, the dispensing line is sealed off from the pumping assembly. In addition, the check valve also seals off the pressure relief outlet in the same movement, by the use of two O-rings placed on a lockdown member. Line maintenance tests may be performed accurately, as well as testing of the pumping assembly, when the check valve and pressure relief valve are closed. This structure provides an improved assembly since the check valve and pressure relief valve are formed in one integral unit so as to be adjacent one another so that both valves can be conveniently closed off at the same time during a maintenance check.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: October 3, 2000
    Assignee: Marley Pump
    Inventor: David S. Young
  • Patent number: 6120260
    Abstract: A fluid pumping apparatus (10) includes a soft start valve (16) coupled with the outlet of a pump (14) driven by an electric motor (12) for reducing the startup current of the motor (12). The preferred valve (16) includes a fluid chamber (32), a valve operator in the nature of a ball (22) shiftable in the chamber (32) between the inlet (36) and a valve seat (48), and a biasing assembly (24) including an axially shiftable rod (54) and a spring (56) for biasing the rod (54) against the ball (22) in order to bias the ball (22) toward the chamber inlet (36). Upon startup, the valve (16) provides a reduced start pressure, less than the pump pressure under load, at the inlet (36) as the operator (22) moves toward the seat (48). The chamber (32) presents a volume sufficient for the valve (16) to provide the start pressure long enough for the motor (12) to achieve synchronous speed, thereby reducing motor startup current.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: September 19, 2000
    Assignee: SPX Corporation
    Inventor: James E. Jirele