Unidirectionally Rotating Cylinder Patents (Class 417/462)
  • Patent number: 10941771
    Abstract: A fluid machine, heat exchanger, and operating method of fluid machine. The fluid machine includes: a rotation shaft (10), a cylinder (20), and a piston assembly (30). The rotation shaft (10) and the cylinder (20) are eccentrically disposed relative to each other and an eccentric distance is fixed. The piston assembly (30) has a variable volume chamber (31). Because the eccentric distance between the rotation shaft (10) and the cylinder (20) is fixed, the rotation shaft (10) and the cylinder (20) rotate about their respective axes thereof during motion and the position of center of mass remains unchanged, so that the piston assembly (30) is allowed to rotate stably and continuously when moving in the cylinder (20); and vibration of the fluid machine is mitigated, a regular pattern for changes in the volume of the variable volume cavity is ensured.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: March 9, 2021
    Assignee: GREE GREEN REFRIGERATION TECHNOLOGY CENTER CO., LTD. OF ZHUHAI
    Inventors: Yusheng Hu, Jia Xu, Zhongcheng Du, Liping Ren, Sen Yang, Lingchao Kong, Liying Deng, Rongting Zhang, Jinquan Zhang
  • Patent number: 10598177
    Abstract: An automotive hydraulic actuating system for actuating a movable vehicle part, like a roof part or a wheel suspension. The actuating system comprises a pump unit. The pump unit comprises a piston pump which has a pump rotor and an electric motor which has a motor rotor. The pump rotor and motor rotor are incorporated into a single common rotor. The rotor is a one piece item. The rotor is positioned inside a pump chamber around a pump stator of the piston pump. The pump stator provides a full support to the common rotor. Advantageously, without a separate motor stator, the pump unit has a more compact configuration. Additionally, the pump unit has an improved dynamic performance which contributes to a silent and reliable operation at a high rotational speed.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: March 24, 2020
    Assignee: Power Packer North America, Inc.
    Inventor: Marcel Gerardus Maria Nieuwenhuis
  • Patent number: 10465669
    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: Grant
    Filed: September 25, 2017
    Date of Patent: November 5, 2019
    Assignee: Chart Inc.
    Inventor: John Corey
  • Patent number: 10253783
    Abstract: A pump arrangement, in particular a magnetic clutch pump arrangement, is provided. The pump arrangement includes a pump housing containing an impeller shaft, an impeller, a casing cover adjacent to the impeller and supporting a plain bearing arrangement. The pump arrangement also includes a containment shell which seals an enclosed chamber within the inner chamber of the pump housing. The plain bearing arrangement includes first and second bearing sleeves connected to the impeller shaft, a first bearing bush which cooperates with the first bearing sleeve via a radial bearing surface and is connected to the pump housing or to a component secured to the pump housing a second bearing bush which cooperates with the second bearing sleeve via a radial bearing surface and is connected to the pump housing or to a component secured to the pump housing, and a retainer ring mounted between the first and second bearing sleeves.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: April 9, 2019
    Assignee: KSB Aktiengesellschaft
    Inventors: Patrick Drechsel, Markus Lay
  • Patent number: 9771931
    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: Grant
    Filed: October 9, 2014
    Date of Patent: September 26, 2017
    Assignee: Chart Inc.
    Inventor: John Corey
  • Patent number: 9546654
    Abstract: The fixed or variable displacement hydraulic motor-pump (1) includes a motor-pump central rotor (3) in which a hydraulic cylinder (14) is arranged, the rotor (3) being in sealed contact with an input-output spool valve (43) connecting the cylinder (14) with a motor-pump frame (2) while a hydraulic piston (13) moves in the cylinder (14) to push, using a hydraulic piston guided plunger (18), a tangential arm (22) articulated in the central rotor (3), and a tangential arm antifriction roller (28) on a motor-pump peripheral rotor (29) synchronized in rotation with the motor-pump central rotor (3).
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: January 17, 2017
    Inventor: Vianney Rabhi
  • Patent number: 9383273
    Abstract: Designs to package a magneto-elastic torque sensor in an automotive transmission, such as front wheel drive (FWD) automatic transmissions, for volume production applications are provided.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: July 5, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: Nimrod Kapas, Joseph F. Kucharski, Gregory Michael Pietron, Yuji Fujii, Steven Adam Hermann, Jeffrey Edward Maurer, Laurence Andrew Deutsch
  • Patent number: 8523536
    Abstract: An axial piston pump has: a cylinder body that forms therein a cylinder chamber extending in an axial direction of a drive shaft and rotates integrally with a driven shaft; a piston that reciprocates in the axial direction of the drive shaft; and a cam device that rotates integrally with the drive shaft and has: a fixed cam member that has a cam surface capable of coming into contact with a cam follower coupled to the piston and is capable of rotating integrally with the drive shaft, with movement of the fixed cam member in the axial direction being restricted; and a movable cam member that has a cam surface capable of coming into contact with the cam follower and is capable of rotating integrally with the drive shaft, with movement of the movable cam member in the axial direction being allowed, irregularity differences in the axial direction of the cam surface of the fixed cam member and the movable cam member being different from each other.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: September 3, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinya Kuwabara, Tadashi Fujiyoshi, Hiroyuki Shiori
  • Patent number: 7753664
    Abstract: Disclosed herein is a rotary pump in which one or more rotors including rotary cylinders and rotary pistons rotate upon inside a housing having a suction hole and a discharge hole to compress a pump fluid. More particularly, the two rotary pistons are arrange to revolve about a rotating shaft in a state wherein the center of mass of the two rotary pistons coincide with that of the rotating shaft, thereby achieving not only a reduction in the generation of vibrations or noise, but also a variation in the flow of rate of fluid. The rotary pump may have a cover, which is opened or closed in accordance with a pressure, to prevent the generation of backflow and pulsations in accordance with the rotation of the rotary pump when the pressure of the discharge hole differs from that of the suction hole.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: July 13, 2010
    Assignee: Himtool Co., Ltd.
    Inventor: Jin-Gieong Go
  • Publication number: 20090252626
    Abstract: The invention provides a system for multiplying pressure comprising at least two hydraulic cylinders communicating with an exit supplying pressure, wherein each cylinder has a piston within a chamber; said pistons cooperating respectively with an associated piston to supply pressure at the exit; and a rotary distributor communicating with said both hydraulic cylinders, able to supply alternatively a fluid to each chamber for motion of the respected pistons and to ensure alternatively return of the pistons.
    Type: Application
    Filed: April 8, 2008
    Publication date: October 8, 2009
    Inventor: Andre Salvaire
  • Patent number: 7544051
    Abstract: A pressurisation pump is provided comprising a first plunger and a second plunger, each plunger being reciprocable within a respective plunger bore defined by a housing, wherein the first and second plungers together with the bores define, at least in part, a pumping volume. The pump also includes an inlet port and an outlet port. An end of the first plunger is arranged to cover the inlet port during a pump delivery stage in which fluid is displaced from the pumping volume and an end of the second plunger is arranged to cover the outlet port during a pump fill stage in which fuel is drawn into the pumping volume. The end of the first plunger and the end of the second plunger are arranged to cover the inlet port and the outlet port respectively during a pump transfer stage during which the pumping volume is maintained.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: June 9, 2009
    Assignee: Delphi Technologies, Inc.
    Inventor: Geoffrey David Bootle
  • Publication number: 20090127925
    Abstract: A hydraulic control unit for a motor vehicle having a motor providing a drive shaft driving a rotatable piston bearing surface at a proximal end of the motor, a hydraulic block providing cavities housing a pumping assembly and fluid control valves, and a control section providing solenoid coils receiving portions of the fluid control valves, with the pump cavity being disposed on a first end of the hydraulic block and the valve cavities being disposed on an opposite end of the hydraulic block, and the pumping assembly being reciprocalably driven by the rotatable piston bearing surface along an axis radially disposed from and otherwise parallel to the axis of rotation of the rotatable piston bearing surface. In another aspect, a pump element having a ball bearing assembly mounted at an oblique angle with respect to the axis of rotation of a seat, and a pumping assembly reciprocally bearing against an outer portion of the ball bearing assembly.
    Type: Application
    Filed: November 15, 2007
    Publication date: May 21, 2009
    Inventors: Daniel N. Borgemenke, David F. Reuter, Jerry L. Newton, Jeffrey Scott Altherr, Terry Lee Fruehling
  • Publication number: 20090060765
    Abstract: An axial piston pump has: a cylinder body that forms therein a cylinder chamber extending in an axial direction of a drive shaft and rotates integrally with a driven shaft; a piston that reciprocates in the axial direction of the drive shaft; and a cam device that rotates integrally with the drive shaft and has: a fixed cam member that has a cam surface capable of coming into contact with a cam follower coupled to the piston and is capable of rotating integrally with the drive shaft, with movement of the fixed cam member in the axial direction being restricted; and a movable cam member that has a cam surface capable of coming into contact with the cam follower and is capable of rotating integrally with the drive shaft, with movement of the movable cam member in the axial direction being allowed, irregularity differences in the axial direction of the cam surface of the fixed cam member and the movable cam member being different from each other.
    Type: Application
    Filed: August 29, 2008
    Publication date: March 5, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinya KUWABARA, Tadashi FUJIYOSHI, Hiroyuki SHIOIRI
  • Patent number: 7029241
    Abstract: A rotary piston machine includes a first spheroidal element including pistons and/or cylinders and a second spheroidal element including pistons and/or cylinders, wherein the first element can move relative to the second element. The machine can be used as part of a pump, compressor, or engine.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: April 18, 2006
    Inventor: Patrick Wade Rousset
  • Patent number: 6929064
    Abstract: There is disclosed an improved pump (5, 5?) particularly suitable for use in a method of “artificial lift” in an oil/gas well. Known pumps used in artificial lift methods suffer from a number of problems/disadvantages—e.g. low efficiency (hydraulic efficiency). The disclosed embodiments of the invention provide a pump (5, 5?) which provides a positive displacement of a predetermined volume of well production fluid for each operative cycle of the pump-in contra-distinction known to pumps which provide axial flow of well production fluid. The inventive pump (5, 5?) provides a chamber (10, 10?) having a volume (V, V?), an inlet (15) to the chamber (10, 10?), an outlet (20) from the chamber (10, 10?), and means for varying the volume (V, V?) of the chamber (10, 10?). The means for varying the volume (V, V?) of the chamber (10, 10?) is controlled by relative rotation of first and second bodies (30, 35, 30?, 35?).
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: August 16, 2005
    Inventor: Hector Fillipus Alexander Von Drentham Susman
  • Publication number: 20040247470
    Abstract: A fuel pump for supplying fuel at high fuel pressures includes a stationary body having a plurality of radial cylinders connecting with a central fuel chamber. Inlet and outlet passages communicate with the fuel chamber. Plungers are reciprocated in the cylinders by cam followers reciprocable in follower recesses of the body. A rotary internal cam engages the cam followers and is configured to reciprocate the plungers in timed relation to sequentially draw fuel from the inlet passage into the central fuel chamber and alternately force fuel from the central fuel chamber to the outlet passage in response to rotation of the rotary cam. A preferred embodiment includes paired smaller and larger diameter cylinders and pistons which are sequentially actuated in overlapping fashion to minimize pulsing of the pressurized fuel discharged from the pump into associated engine fuel lines.
    Type: Application
    Filed: June 9, 2003
    Publication date: December 9, 2004
    Inventors: Eugen Maier, Michael Raymond Raney
  • Publication number: 20040228749
    Abstract: A pressurisation pump is provided comprising a first plunger and a second plunger, each plunger being reciprocable within a respective plunger bore defined by a housing, wherein the first and second plungers together with the bores define, at least in part, a pumping volume. The pump also includes an inlet port and an outlet port. An end of the first plunger is arranged to cover the inlet port during a pump delivery stage in which fluid is displaced from the pumping volume and an end of the second plunger is arranged to cover the outlet port during a pump fill stage in which fuel is drawn into the pumping volume. The end of the first plunger and the end of the second plunger are arranged to cover the inlet port and the outlet port respectively during a pump transfer stage during which the pumping volume is maintained.
    Type: Application
    Filed: February 17, 2004
    Publication date: November 18, 2004
    Inventor: Geoffrey David Bootle
  • Patent number: 6805538
    Abstract: A pump, for supplying high pressure fuel from a fuel tank to an engine via a common rail, includes a motor assembly (20) mounted on top of the fuel tank, a pump assembly (26) positioned within the fuel tank, and a support column (32) rotatably connecting the motor assembly to the pump assembly. A high pressure pump sub-assembly (46) includes a pump body (48) having a drive bore (50) and multiple plunger bores (60) formed therein. The external profile of a drive member (58) which is rotatable within the drive bore engages the radially inner end of pumping plungers (62) disposed in each of the plunger bores for a portion of each revolution to reciprocally move the plungers between radially inner and outer limit positions. Reciprocation towards the inner limit position induces a low pressure in the radially outer end of the plunger bore, thereby drawing fuel via the drive bore without the aid of a low pressure pump.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: October 19, 2004
    Assignee: Stanadyne Corporation
    Inventor: Ilija Djordjevic
  • Publication number: 20040131486
    Abstract: A solenoid-valve-controlled fuel-injection pump for internal combustion engines, in particular diesel engines, has a solenoid valve (18), whose valve needle (17) separates a high-pressure region (14, 15) from a low-pressure region (21), i.e. connects the high-pressure region and low-pressure region, in the pump housing, via a valve seat (16); the injection period being controlled by the opening of the solenoid valve (18). In addition, a low-pressure compensating piston (24) situated in the low-pressure region (21) is provided in order to compensate for pressure fluctuations in the low-pressure region (21).
    Type: Application
    Filed: November 8, 2002
    Publication date: July 8, 2004
    Inventors: Peter Boehland, Andreas Sterr, Andreas Dutt
  • Patent number: 6733256
    Abstract: The invention relates to a device for producing consumables, especially filled chocolates that consist of a coated filling. The aim of the invention is to provide a device for feeding substances of the consumables to nozzles in a controlled manner. To this end, the device is provided with pumps that comprise pump pistons in a pump chamber and at least two pump chambers are located in a pump housing one on top of the other.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: May 11, 2004
    Assignee: KMB Produktions AG
    Inventor: Josef Guido Knobel
  • Patent number: 6692237
    Abstract: A rotary cylinder apparatus which prevents a fluid from leaking from a contact portion of a piston and a cylinder member and consequently enables efficient rotation. The rotary cylinder apparatus comprises: a rotary cylinder member 2 which has cylinder chambers 22 and 23 formed thereto so as to pass through a rotary shaft center O and rotates around the rotary shaft center O; pistons 3 and 4 demonstrating reciprocating linear motion in the cylinder chambers 22 and 23; a piston holding member 5 which holds the pistons 3 and 4 and rotates around a rotation center X eccentric from the rotary shaft center O of the rotary cylinder member 2; and a casing 6 which rotatably supports the rotary cylinder member 2 and has at least one inlet 61 and at least one outlet 62, wherein the pistons 3 and 4 are rotatably supported at a position away from the rotation center X of the piston holding member 5 by a fixed distance and with that position at the center thereof.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: February 17, 2004
    Assignee: Kabushiki Kaisha Sankyo Seiki Seisakusho
    Inventors: Fumito Komatsu, Kenji Muramatsu, Yuki Nakamura, Tomohiro Takeuchi
  • Patent number: 6672848
    Abstract: A cruciform pump comprises a casing, a positioning round disk in the casing; a driven rotary disk; and two sliding blocks. A center of the positioning round disk is arranged corresponding to a center of the casing, and has a cruciform sliding groove. The driven rotary disk is eccentrically installed on the positioning round disk. One rotary shaft at one surface of the rotary disk protrudes out of the casing. The two sliding blocks are installed in the cruciform sliding groove. Each block is conformed to the sliding groove, so that the positioning round disk is driven by the sliding blocks. When the driven rotary disk rotates through two circles, the positioning round disk only rotates through one circle. During rotation, the two sliding blocks move along the cruciform sliding groove; then, one side of the sliding block presses fluid flowing out, and another side thereof will suck fluid into the sliding groove.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: January 6, 2004
    Inventor: Gene-Huang Yang
  • Patent number: 6637383
    Abstract: A rotary power device of the swinging piston type has a cylindrical rotor mounted between internal and external portions of a stator. The internal stator provides intake and exhaust channels and may hold an igniter. The external stator includes two axially adjacent cam tracks with diametrically opposed eccentricities with respect to the axis of rotation. The rotor includes two axially spaced sets of sector-shaped compartments arranged at equal angular intervals around the inner stator, where each set is axially aligned with a respective cam track. Each compartment is open at the periphery of the rotor and has an inner opening aligned with ports in the internal stator. A sector-shaped piston mounted in each compartment pivots about an axis at one vertex of the compartment. Each piston includes a roller follower for engaging the respective cam track as the rotor rotates.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: October 28, 2003
    Inventor: Osama M Al-Hawaj
  • Patent number: 6634871
    Abstract: An object of the present invention is to provide a suction-discharge device for fluids capable of sucking fluids continuously and discharging fluids continuously under fixed flow rate and pressure, without substantially bringing about pulsations of even one unit.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: October 21, 2003
    Inventor: Kazumasa Ikuta
  • Publication number: 20030180166
    Abstract: A cruciform pump comprises a casing, a positioning round disk in the casing; a driven rotary disk; and two sliding blocks. A center of the positioning round disk is arranged corresponding to a center of the casing, and has a cruciform sliding groove. The driven rotary disk is eccentrically installed on the positioning round disk. One rotary shaft at one surface of the rotary disk protrudes out of the casing. The two sliding blocks are installed in the cruciform sliding groove. Each block is conformed to the sliding groove, so that the positioning round disk is driven by the sliding blocks. When the driven rotary disk rotates through two circles, the positioning round disk only rotates through one circle. During rotation, the two sliding blocks move along the cruciform sliding groove; then, one side of the sliding block presses fluid flowing out, and another side thereof will suck fluid into the sliding groove.
    Type: Application
    Filed: March 19, 2002
    Publication date: September 25, 2003
    Inventor: Gene-Huang Yang
  • Patent number: 6619243
    Abstract: A rotary power device of the swinging piston type comprises a cylindrical rotor mounted between internal and external portions of a stator. The internal portion of the stator provides intake and exhaust channels and may hold an igniter. The external portion of the stator includes a middle portion with an oval cam track. The rotor includes a multiplicity of sector-shaped compartments arranged at equal angular intervals around the inner stator. Each compartment is open at the periphery of the rotor and has an inner opening to the central bore in alignment with ports in the central internal stator. A sector-shaped piston is mounted in each compartment for pivotal motion about a pivot axis at one vertex of the compartment. Each piston includes a roller follower for engaging the oval-shaped cam track as the rotor rotates, which causes angular reciprocation of the pistons within the compartments while performing intake and exhaust cycles through inner openings.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: September 16, 2003
    Inventor: Osama M. Al-Hawaj
  • Patent number: 6568923
    Abstract: It is an object of the present invention to provide a fluid suction and discharge apparatus capable of continuously discharging fluid with a predetermined flow rate and pressure continuously sucking the fluid without substantially giving rise to pulsation. This invention comprises an inner tube rotatably fitted in a fitting hole of the apparatus body, a cylinder slidably fitted into the inner tube, and a plurality of through-holes formed in the inner tube, wherein when the cylinder is reciprocated in association with rotation of the inner tube, and when one of the through-holes of the inner tube is communicated with a suction hole of the apparatus body, the other through-hole of the inner tube is communicated with a discharge hole of the apparatus body, and when fluid is sucked from a communication suction hole thus communicated, fluid is discharged from the discharge hole thus communicated.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: May 27, 2003
    Inventor: Kazumasa Ikuta
  • Patent number: 6511304
    Abstract: A radial plunger machine is disclosed. The radial plunger machine includes a pintle and a rotor which is rotatable about said pintle, at least one radial cylinder bore being provided in the rotor, a plunger being reciprocably arranged in said cylinder bore, and the pintle being provided with an inlet duct and an outlet duct for supplying and discharging hydraulic fluid to and from the cylinder bore, respectively. The pintle is made from austenitic stainless steel and has a higher coefficient of linear thermal expansion than the material of the rotor.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: January 28, 2003
    Assignee: Actuant Corporation
    Inventor: Daniël van't Veen
  • Publication number: 20020159903
    Abstract: In the check valve having a valve seat member and the valve member, the valve seat member is provided with first and second conical seats. The second conical seat is positioned upstream the first conical seat. An angle of the second conical seat to an axis of the valve member is more acute than that of the first conical seat. Since the check valve has the second conical seat, contact pressure applied to the first conical seat is uniformly dispersed and, thus, the first conical seat is less worn out. Further, the second conical seat prevents the valve member from cutting into and sticking to the valve seat member, even if the wear has been progressed. Accordingly, an operation of the check valve is stable for a longer period of time.
    Type: Application
    Filed: April 26, 2002
    Publication date: October 31, 2002
    Inventor: Yasutaka Utsumi
  • Patent number: 6293757
    Abstract: An amount of pressurized fluid is pumped by a high-pressure fluid pump to a common rail in an engine by using a multi-functional control circuit (ECU) that improves the controllability of fluid pumped to the common rail such that a target pressure in the common rail is achieved notwithstanding the loss of fuel injected from the common rail into the engine's cylinders nor the variety of pressure losses or deviations occurring throughout the system. The ECU sets a base fluid pumping amount based on a target value of pressure in the common rail and an amount of fluid ejected from the common rail. The ECU also calculates a fluid pumping amount required to cause the actual pressure of the common rail to follow a change of a target pressure of the common rail according to the amount of change of the target pressure.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: September 25, 2001
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomihisa Oda, Takao Fukuma, Yasuo Harada
  • Patent number: 6286485
    Abstract: A distributor arrangement is disclosed which comprises a distributor member rotatable within a bore formed in a sleeve, the sleeve being provided with a supply port through which fuel under high pressure can be supplied to the distributor member, in use, and a plurality of delivery ports, the distributor member being provided with a delivery passage registrable with the delivery ports, in turn, upon rotation of the distributor member whereby fuel under pressure supplied through the supply port flows to a selected one of the delivery ports, in use, the distributor arrangement further comprising a porting arrangement whereby, when the distributor member occupies a position in which the delivery passage is not registered with any of the delivery ports, cooling fluid is able to flow through the delivery passage.
    Type: Grant
    Filed: July 20, 1999
    Date of Patent: September 11, 2001
    Assignee: Lucas Industries plc
    Inventor: George Nicholas Felton
  • Patent number: 6280160
    Abstract: A fuel injection pump of the distributor type which has a reciprocatingly driven pump piston that is load-bearing in a rotating distributor shaft which pumps fuel out of a pump work chamber to various fuel injection valves via a distributor opening. To control the duration of high-pressure injection, an electrically actuated valve is provided with a valve member in a valve chamber that communicates with the pump work chamber and from a second valve chamber, communicates with a low-pressure region. To terminate the high-pressure injection, the valve member makes a communication between the two valve chambers, whereupon the outflow of the fuel stream is controlled by disposing a diameter constriction in the connecting line, thus reducing any tendency to cavitation.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: August 28, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Heinz Nothdurft, Nestor Rodriguez-Amaya, Andreas Dutt, Hubert Greif
  • Patent number: 6231319
    Abstract: A hermetic compressor includes a plurality of compressing mechanisms. Each of the compressing mechanism includes a rotary cylinder having a groove, and a piston slidable in the groove, so that a compressing stroke is carried out by rotation of said piston on a locus of a radius E about a point spaced apart at a distance E from the center of said rotary cylinder. A partition plate is interposed between the rotary cylinders of the adjacent compressing mechanisms. The partition plate is provided with a communication bore through which a shaft is passed. The partition plate is provided with cranks on which said pistons can be mounted. A motor mechanism section is adapted to drive the pistons of the compressing mechanisms by the common shaft. At least one of the compressing mechanisms is different in phase in a compressing stroke from the other compressing mechanisms.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: May 15, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Noboru Iida, Kiyoshi Sawai
  • Patent number: 6212994
    Abstract: A positive displacement rotary machine includes a piston rotor rotatable about a first axis and including a number of pistons equally spaced about the first axis and rotatably mounted about their axes on the piston rotor; a chamber rotor rotatable about a second axis spaced from the first axis, including a central common chamber and a number of radial fluid chambers arranged in diametrically opposed pairs across the common chamber, and guide tracks extending between opposing pairs of radial chambers across the common chamber for kinematically constraining each of the pistons as they move from one of their associated radial chambers to the other through the common chamber, and intake and exhaust ports for introducing and exhausting fluid from the radial chambers.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: April 10, 2001
    Inventor: David A. Estrabrooks
  • Patent number: 6206661
    Abstract: A hermetic compressor includes a compressor mechanism section 40 which includes first and second rotary cylinders 41a and 41b, and first and second pistons 42a and 42b eccentrically rotated in first and second grooves 42a and 43b in the first and second rotary cylinders 41a and 41b, upper and lower bearings 50a and 50b which clamp the first and second rotary cylinders 41a and 41b, and a casing 51. A projection, 64, a projection 66 or a recess 67 is formed on slide faces in the components of the compressor mechanism section 40, whereby the power loss due to the viscosity is reduced remarkably by reducing the sliding area of the slide faces. Thus, the efficiency of the compressor can be enhanced, and the inclination and the eccentricity of the rotary cylinder can be suppressed to the minimum.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: March 27, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Noboru Iida, Kiyoshi Sawai
  • Patent number: 6183212
    Abstract: A fuel supply pump having a plurality of radially disposed plunger sleeves each containing a pumping plunger with a driven end reciprocally movable within the plunger sleeve between a pumping position and a filling position. The fuel supply pump includes a rotatable drive member and a plurality of sliding shoes. Each shoe has a first face adjacent a respective plunger driven end and a second face adjacent the drive member. In one variation, each shoe first face includes a socket which the plunger driven end snaps into and is captured by, creating a sliding shoe assembly. A case couples all of the sliding shoe assemblies. In another variation, the cage includes apertures which the plunger driven end snaps through, thereby capturing the plunger. The plunger driven end engages a seat included on the sliding shoe first face. Rotation of the drive member moves each shoe, and thereby, each plunger toward the pumping position.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: February 6, 2001
    Assignee: Stanadyne Automotive Corp.
    Inventor: Ilija Djordjevic
  • Patent number: 6179583
    Abstract: A metering device for pressurized fluids has a rotor containing an oscillating free piston operating in a bore at right angles to the rotor axis. The piston is driven by the fluid to be metered. The rotor is retained within a stator having inlet and outlet ports. When the rotor is rotated, a first end of the bore becomes in fluid connection with the inlet port and the piston is operated upon by the pressurized fluid and moves within the bore in a first direction towards the outlet port. As the rotor is turned further, the second end of the bore becomes in fluid connection with the inlet port whilst the first end is made in fluid connection with the outlet port, and the piston reverses to move in a second direction, i.e. towards the outlet port to discharge the fluid which had previously moved the piston in a first direction.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: January 30, 2001
    Assignee: Weston Medical Limited
    Inventor: Terence Edward Weston
  • Patent number: 6058910
    Abstract: An improved rotary fuel distributor is provided which effectively dynamically centers the rotor during operation while actively cooling the rotor and refilling fuel passages to minimize cavitation. A pressure balancing system is provided which includes pressure area defining grooves formed adjacent a rotor outlet port to control the pressure gradient in the clearance between the rotor and the distributor housing thereby effectively providing a more predictable force component which can be controlled to more effectively balance the rotor in conjunction with two balancing ports positioned on the opposite side of the rotor from the outlet port. A refill and cooling system is provided to continuously and actively cool the rotor with cool, low pressure fuel throughout rotation thereby displacing the hot fuel with cool fuel and effectively preventing thermal seizure of the rotor.
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: May 9, 2000
    Assignee: Cummins Engine Company, Inc.
    Inventors: Scott R. Simmons, John D. Lane, Mark S. Cavanagh, Alfred R. Nerz, Frank R. Hunt, Gordon K. Butler, Bela Doszpoly
  • Patent number: 6027312
    Abstract: A pump and associated method including the steps of pre-metering successive quantities of fuel from a reservoir to a positive displacement transfer pump, then actuating the transfer pump to raise the pressure of the successive quantities of fuel by at least about 100 psi, preferably 200-300 psi. Each quantity of fuel which was pressurized in the transfer pump, is delivered to a high pressure pumping chamber so that each pumping bore receives a certain, i.e., predetermined, charge of fuel within a first time interval. A plurality of plungers in the respective pumping bores are then simultaneously actuated to increase the pressure in the pumping chamber to the desired high pressure, preferably at least about 15,000 psi, within a second time interval, and to discharge the quantity of fuel through a high pressure discharge valve. The second time interval is of longer duration than the first time interval.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: February 22, 2000
    Assignee: Stanadyne Automotive Corp.
    Inventor: Ilija Djordjevic
  • Patent number: 5947707
    Abstract: A fuel pump is disclosed which comprises a plunger reciprocable under the influence of a cam surface. The cam surface is shaped to include a first region and a second region. As the plunger moves under the influence of the first region, a pressure wave is generated which is able to reach a spill valve prior to the plunger moving under the influence of the second region to generate a pressure sufficient to open a delivery valve.
    Type: Grant
    Filed: May 20, 1997
    Date of Patent: September 7, 1999
    Assignee: Lucas Industries
    Inventor: George Nicholas Felton
  • Patent number: 5889733
    Abstract: In a timer device having a timer sleeve at a housing with a timer piston slidably provided at the timer sleeve, a high pressure chamber is constituted by securing to the housing a high pressure side cover member constituted as an integrated part of the timer sleeve. The high pressure chamber and a passage at the housing communicating with a chamber are connected to each other by a passage formed in high pressure side cover member. A check valve for absorbing shock waves generated within the high pressure chamber is provided in the passage in the high pressure side cover member. The passage can be designed and manufactured with ease, and at the same time, the timer piston and the check valve can be separately designed and manufactured. Furthermore, stable operation of the check valve is achieved.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: March 30, 1999
    Assignee: Zexel Corporation
    Inventors: Kenichi Kubo, Tatsuo Nakajima
  • Patent number: 5857444
    Abstract: A rotor that rotates in synchronization with an engine is provided inside a housing and a cam ring is provided outside and around the rotor so that plungers are caused to move reciprocally in the direction of the radius by the cam ring as the rotor rotates. At both sides of the cam ring, support members (barrel 8, bearing support member 6) constituted of the same material as that of the cam ring are secured to the housing and to both sides of the cam ring, and these support members alone hold the cam ring from both sides rotatably. A connecting rod connecting the cam ring and the timer mechanism is formed as an integrated part of the cam ring. The clearance between the cam ring and the members holding it can be set small so that the vibration of the cam ring is reduced to minimize the impact noise made by the cam ring and wear of the cam ring. In addition, the connection strength between the cam ring and timer mechanism is increased.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: January 12, 1999
    Assignee: Zexel Corporation
    Inventors: Kenichi Kubo, Kazuaki Narikiyo, Jun Matsubara
  • Patent number: 5810569
    Abstract: A pump is disclosed having a variable cam arrangement under the influence of which a plunger is reciprocable. The variable cam arrangement comprises a plurality of cam rings which in an embodiment of the pump are relatively moveable in order to adjust the shape of the effective cam surface of the cam arrangement, and hence adjust the delivery rate of the pump.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: September 22, 1998
    Assignee: Lucas Industries public limited company
    Inventors: Paul Buckley, Ian Roy Thornthwaite, John Roderick Jefferson
  • Patent number: 5782620
    Abstract: A fuel injection pump for internal combustion engines which has a moving part supported in a housing bore and on its jacket face on one side, has an exit opening that is under high pressure, and whose bearing is improved by virtue of the fact that on the jacket face of the part or in the wall of the housing bore, at least one pressure compensation is provided. The compensation face is connected to a high pressure source, is disposed on a side of the jacket face of the part which side is remote from the exit opening, and is continuously covered by the wall of the housing bore. As a result, a compensation of the pressure action by means of the pressure field prevailing in the region of the exit opening occurs so that an improved, less damage-prone bearing is produced with a greater high pressure tightness of the moving part.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: July 21, 1998
    Assignee: Robert Bosch GmbH
    Inventors: Heinz Nothdurft, Wolfgang Fehlmann, Bernhard Bonse, Nestor Rodriguez-Amaya, Ewald Eblen, Holger Pitsch, Andreas Sterr, Walter Fuchs, Andreas Dutt, Joerg Wolke
  • Patent number: 5782619
    Abstract: A fuel injection pump, in which there is provided in a distributor of the fuel injection pump, a longitudinal bore which connects a pump working space to a control point on the distributor and which is fashioned in the distributor from one end face of the distributor. For sealingly closing this longitudinal bore, there is provided a pin which is inserted into a transverse bore intersecting the longitudinal bore and which thus has a sealing fit influenced by the pressure in the longitudinal bore.
    Type: Grant
    Filed: October 26, 1995
    Date of Patent: July 21, 1998
    Assignee: Robert Bosch GmbH
    Inventor: Wolfgang Fehlmann
  • Patent number: 5769611
    Abstract: A plurality of plungers situated radially in a pump body, are sequentially actuated inwardly by a rotatably driven, eccentrically mounted actuating ring. A central valve housing is coaxially received within the body and includes a fuel inlet chamber and a fuel discharge chamber, which are closely axially aligned. The pump body closely engages the valve housing such that radially extending bores in the body and a portion of the valve housing between the inlet and discharge chambers, together define the pumping chambers. All pumping chambers are connected via short passages in the valve housing, to the common inlet chamber and the common outlet chamber. This configuration, by which all fuel passages and associated valves subject to the pumping pressure are within the central valve housing, not only minimizes the dead volume, but keeps all fuel flows confined within a radius that is smaller than the actuator ring sliding radius, i.e.
    Type: Grant
    Filed: September 6, 1996
    Date of Patent: June 23, 1998
    Assignee: Stanadyne Automotive Corp.
    Inventor: Ilija Djordjevic
  • Patent number: 5700139
    Abstract: A fuel injection pump of the distributor type which has at least one pump piston driven in a reciprocating stroke motion, a rotating distributor shaft which via a distributor bore upon rotation establishes a communication between the pump work chamber, defined by the pump piston, and an injection nozzle, and a switching valve for metering the fuel injection quantity. To achieve highly stable hydraulics upon opening and closing of the switching valve, a low-pressure piston is connected to the valve member of the switching valve; the low-pressure piston is axially displaceably guided on the low-pressure side of the switching valve, downstream of the outlet of a relief bore, in a wall segment. Preferably, the outer diameter of the low-pressure piston is made to largely approximate the diameter of the seat face of the valve member on the associated valve seat.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: December 23, 1997
    Assignee: Robert Bosch GmbH
    Inventor: Nestor Rodriguez-Amaya
  • Patent number: 5680844
    Abstract: A rotary distributor fuel injection pump includes a pumping plunger housed in a bore and has a spill valve member integrally formed with an actuator piston contained in a cylinder. High pressure fuel from the bore can be admitted to the one end of the cylinder to move the actuator piston and valve member away from the seating by opening an on/off valve. When the spilled fuel has been returned to the bore further fuel flows to the bore by way of the on/off valve and this fuel flows to the on/off valve through a non-return valve from a source of fuel under pressure.
    Type: Grant
    Filed: December 13, 1995
    Date of Patent: October 28, 1997
    Assignee: Lucas Industries public Limited Company
    Inventors: George Nicholas Felton, Michael Peter Cooke
  • Patent number: 5681153
    Abstract: A two-rotor, sliding member rotary compressor with an inner rotor, an outer rotor, and at least three sliding members between the inner rotor and the outer rotor. The inner rotor has an outer surface which contains at least one flat portion. The inner rotor is supported by support shafts on each of its ends. The compressor is comprised of a first end plate located on a first end of said inner rotor and a second end plate located on a second end of said inner rotor; each of the end plates supports the inner rotor through a set of bearings. The compressor also has a center housing with a circular interior having an inner surface that is eccentric to the inner rotor, an inlet port, and a discharge port. The outer rotor has a circular exterior that surrounds the inner rotor but is eccentric thereto.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: October 28, 1997
    Assignee: Carrier Corporation
    Inventor: Roger C. Weatherston
  • Patent number: 5666921
    Abstract: A fuel supply apparatus is disclosed which includes a distributor comprising a distributor member rotatable within a bore provided in a sleeve. The sleeve is provided with a plurality of feed ports and a plurality of delivery ports, fewer feed ports being provided than delivery ports. The distributor member is provided with a delivery passage registrable with the delivery ports, in turn, and a plurality of feed passages registrable with the feed ports. The feed and delivery passages communicate with one another. The feed and delivery passages are located so that when the delivery passage registers with one of the delivery ports, one or more of the feed passages register with respective feed ports.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: September 16, 1997
    Assignee: Lucas Industry Public Limited Company
    Inventor: Peter Alban George Collingborn