Biasing Means Effects Induction Stroke Of Abutment Driven, Vacuum Producing Pumping Member Patents (Class 417/470)
  • Patent number: 10385833
    Abstract: A reciprocating pump, in particular a hydraulic pump of a slip-controlled vehicle braking system, includes a step piston, a differential pressure valve, and a pump outlet. The step piston includes a piston step that delimits a stepped space which is in communication with the pump outlet via the differential pressure valve. The piston step is configured such that the step space undergoes suction and displacement in a direction opposite to a displacement space, and in smaller quantities than suction and displacement in the displacement space, such that brake fluid volume flow in the pump outlet is evened out, and such that pressure pulsations are inhibited.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: August 20, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Jens Norberg, Patrick Schellnegger, Andreas Lechler, Oliver Gaertner
  • Patent number: 10385845
    Abstract: A high pressure fuel pump includes a pump head from which extends a turret, a bore extends along a main axis from a pumping chamber through the turret to an open end. A piston is arranged in the bore and protrudes out of the turret, an outer extremity being provided with a cam follower. A spring is arranged around the piston and slipped over the turret, the spring is compressed between the cam follower and the main part of the pump head. A cup shaped sleeve is arranged around the turret and defines a volume between the turret and the peripheral wall which fills with fuel that has leaked between the piston and the blind bore from the pumping chamber. A bottom face of the sleeve is provided with a hole through which the piston extends. An opening in the peripheral wall allows fuel to exit the volume.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: August 20, 2019
    Assignee: DELPHI TECHNOLOGIES IP LIMITED
    Inventors: Paul F. Garland, Toby J. Pedley
  • Patent number: 9885329
    Abstract: A roller tappet includes a roller and a roller shoe in which the roller is rotatably mounted. The roller shoe has a first lateral surface with a recess for receiving the roller, a second lateral surface opposite the first lateral surface, and a third lateral surface between the first and second lateral surfaces. The third lateral surface and at least part of the second lateral surface are each curved.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: February 6, 2018
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventor: Ngoc-Tam Vu
  • Patent number: 9429154
    Abstract: An electromagnetic pump including a suction check valve including a tubular portion and a flange portion that extends in a radial direction from an end edge of the tubular portion, the suction check valve being formed with a through hole that penetrates the tubular portion and the flange portion to form a suction port in an end surface of the flange portion. A strainer attached to the suction port and having a pore forming region which is larger than an inside diameter of the through hole at the tubular portion and in which a large number of pores are formed. The suction check valve is formed with a diameter reducing portion formed such that the inside diameter of the through hole is reduced from the flange portion toward the tubular portion with a degree of diameter reduction varied from a large value to a small value.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: August 30, 2016
    Assignee: AISIN AW CO., LTD.
    Inventors: Kazunori Ishikawa, Masaya Nakai
  • Patent number: 9360008
    Abstract: A piston pump includes a piston assembly which has at least one transverse bore which corresponds to a longitudinal bore. The piston pump further includes a cylinder in which the piston assembly is guided in a longitudinally movable manner, and an inlet valve which includes a cage element, in which an inlet valve spring and sealing element are arranged, and a corresponding inlet valve seat which is arranged on the piston assembly. The inlet valve sealing element can be pressed sealingly into the corresponding inlet valve seat by means of a restoring spring in order to close off the longitudinal bore. The restoring spring is designed as a simple cylindrical spiral spring which is supported axially with an upper end winding against the cage element and with a lower end winding against a cylinder base. The cage element has an elastic high-pressure sealing element which, in the direction of a cylinder wall, has a radial support region for holding and centering the upper end winding of the restoring spring.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: June 7, 2016
    Assignee: Robert Bosch GmbH
    Inventors: Beate Schumann, Horst Beling, Marc Zimmermann
  • Patent number: 9004883
    Abstract: A low noise, high efficiency solenoid pump includes a housing containing a hollow electromagnetic coil. Within the coil resides a pump assembly defining a tubular body having a pair of opposed ends which respectively include an inlet or suction port and an outlet or pressure port and within which a plunger or piston resides. The piston is biased in opposite directions by a pair of opposed compression springs. A first compression spring limits and arrests travel of the piston during the suction or return stroke and a second compression spring limits travel of the piston during the pumping stroke and returns the piston after the pumping stroke. The piston includes a first check valve that opens to allow hydraulic fluid into a pumping chamber during the suction stroke and closes during the pumping stroke to cause fluid to be pumped out of the pumping chamber.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: April 14, 2015
    Assignee: GM Global Technology Operations, LLC
    Inventors: Vijay A. Neelakantan, Paul G. Otanez, Shushan Bai
  • Patent number: 8801408
    Abstract: The invention relates to a piston pump for a motor vehicle braking system having a housing section and a piston guided displaceably in the housing section. The invention further has an intake valve having a valve seat arranged on the piston. The valve seat is configured as a circular sealing edge. A spherical valve body of the intake valve seals against the spherical sealing edge.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: August 12, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Heiko Druckenmueller, Oliver Schmautz, Marc Zimmermann
  • Patent number: 8794936
    Abstract: A high-pressure fuel supply pump includes a compression chamber, a plunger reciprocating in the compression chamber for pressurizing fuel in the compression chamber, a discharge valve for discharging pressurized fuel from the compression chamber to a high-pressure fuel passage of a high-pressure fuel supply system for supplying high-pressure fuel to an internal combustion engine, and a first solenoid actuated valve for connecting and disconnecting a first low-pressure fuel passage and the compression chamber. The first solenoid actuated valve is biased by a first biasing member in a closing direction of the first solenoid actuated valve, and is opened or kept open against the biasing force of the first biasing member, when the first solenoid actuated valve is energized. The high pressure fuel supply pump further includes a second solenoid actuated valve for connecting and disconnecting a second low-pressure fuel passage and the compression chamber.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: August 5, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Kenichiro Tokuo, Jonathan Borg
  • Publication number: 20140178227
    Abstract: A pump arrangement includes a microfluidic pump having a pump inlet and a pump outlet. The pump arrangement further includes a safety valve arrangement having first safety valve, the first safety valve being arranged between the pump outlet and an outlet of the pump arrangement and including a first valve seat and a first valve lid. The outlet of the pump arrangement and a first fluid region are formed in a first part of the pump arrangement, wherein the first valve lid is formed in a second integrated part of the pump arrangement, and wherein the first valve seat, the pump outlet and the pump inlet are patterned in a second surface of a third integrated part of the pump arrangement. The first fluid region is adjacent to the first valve lid, wherein a pressure in the first fluid region has a closing effect on the first safety valve.
    Type: Application
    Filed: September 16, 2013
    Publication date: June 26, 2014
    Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Martin RICHTER, Martin WACKERLE
  • Patent number: 8677976
    Abstract: A high pressure fuel pump (20) that pressurizes and supplies a fuel by driving a cam (21) such that a plunger (23) reciprocates, the high pressure fuel pump (20) comprises a lifter guide (25) having a guide hole (25A), a lifter (22) that is disposed between the cam (21) and the plunger (23) and is fitted into the guide hole (25A) to be free to slide so as to transmit a driving force from the cam (21) to the plunger (23), an oil collection portion (27) that is provided above the guide hole (25A) so as to surround a periphery of the lifter (22), and stores a lubricating oil for lubricating a sliding portion between the lifter (22) and the guide hole (25A), and an oil supply passage (25C) for supplying the lubricating oil to the oil collection portion (27). As a result, a reduction in a lubricating performance with regard to the lifter (22) in a position away from an opening portion of the oil supply passage (25C) is suppressed.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: March 25, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Noriyoshi Maruyama, Tomoyuki Koike
  • Patent number: 8579611
    Abstract: A clamping and seal loading technique for securing the plunger sleeve to the pump housing of a single plunger fuel pump. This is achieved by providing a load ring between a sleeve retainer and the sleeve, such that the axial force applied by the retainer during installation and attachment to the plunger bore wall of the housing, is distributed more evenly on the sleeve and the sealing surface of the sleeve against the housing adjacent to the pumping chamber. The even distribution of force minimizes misalignment of the sleeve and thus maintains concentricity between the sleeve and the plunger.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: November 12, 2013
    Assignee: Stanadyne Corporation
    Inventor: Robert Lucas
  • Patent number: 8556602
    Abstract: A fuel pump for a direct injection system comprises at least one pumping chamber, a piston slidingly mounted inside the pumping chamber to cyclically vary volume thereof, an intake duct connected to the pumping chamber and regulated by an inlet valve, a delivery duct connected to the pumping chamber and regulated by a one-way valve that allows only outgoing-fuel flow from the pumping chamber, a seat arranged below the pumping chamber around a lower portion of the piston, an annular seal housed in the seat and preventing fuel leakage along a side wall of the piston, and an annular element that delimits, on an upper side thereof, the seat housing the seal such that an axial dimension of the seat is not greater than an axial dimension of the seal to prevent the seal from axially “shaking” inside the seat as a consequence of cyclic axial movement of the piston.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: October 15, 2013
    Assignee: Magneti Marelli S.p.A.
    Inventors: Luca Mancini, Daniele De Vita, Massimo Mattioli
  • Patent number: 8523541
    Abstract: The invention relates to a one-piece plastic element having an inlet valve cover and an inlet valve seat element for an inlet valve of a piston pump of a hydraulic brake system of a motor vehicle. The inlet valve is designed as a check valve, and the inlet valve cover and the inlet valve seat element are connected to each other by a designed fracture point. The invention further relates to a piston pump having an inlet valve cover and inlet valve seat element made of a one-piece plastic element. The invention further relates to a method for assembling the inlet valve designed as a check valve.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: September 3, 2013
    Assignee: Robert Bosch GmbH
    Inventor: Harald Hermann
  • Patent number: 8452510
    Abstract: A device includes: actual-intake-pipe-pressure detection unit (11); estimated-intake-pipe-pressure detection unit (12) for calculating an estimated intake pipe pressure based on a rotation speed of the engine and an opening degree of a throttle valve; pressure difference calculation unit (13) for calculating a pressure difference between the actual and estimated intake pipe pressures; pressure difference integration unit (14) for integrating the pressure difference with respect to time; pumping brake detection unit (15) for determining that a pumping brake operation is performed when a integral value is equal to or more than a first determination value; and throttle valve control unit (16) for carrying out control for the pumping brake during the pumping brake operation based on a result of the determination by the pumping brake detection unit (15), and carrying out ordinary control otherwise.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: May 28, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akiyoshi Katayama, Takashi Matsumoto
  • Patent number: 8388326
    Abstract: A piston pump assembly includes a first pump having a first cylinder member inserted in a piston hole of a pump housing, and a first piston inserted in the first cylinder member, and a second pump having a second cylinder member inserted in the piston hole, and an annular second piston slidably fitted in an annular groove formed in the outer periphery of the first piston, and also axially slidably inserted in the second cylinder member. The first cylinder member axially presses the second cylinder member, thereby preventing the second cylinder member from being dropped out of the piston hole. The second cylinder member has an annular seal surface in contact with a shoulder surface formed on the inner periphery of the piston hole. Strain-absorbing protrusions are formed on the end of the second cylinder member in abutment with the first cylinder member. The protrusions are compressed when they are pressed by the first cylinder member.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: March 5, 2013
    Assignee: Advics Co., Ltd.
    Inventors: Atsushi Sumimoto, Tomoo Harada
  • Patent number: 8382459
    Abstract: The invention relates to a piston pump for conveying a fluid, in particular in a vehicle brake system. The piston pump has a cylinder and a piston movably disposed in the cylinder. A restoring element preloads the piston, and a drive unit for actuates the piston in the cylinder to pump the fluid into a pressure chamber formed in the cylinder. The piston is embodied by a first piston par and a second piston part. The first piston part is a cylindrical body, which can be moved by the drive unit. The second piston part form the piston base, in which four radial inlet openings and one axial connection opening for communication with the pressure chamber are disposed. A flange for the disposition of a seal is disposed on the outer circumference of the piston base element. The openings are simple to make in the face ends and circumferential regions of the second piston part.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: February 26, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Wolfgang Schuller, Marc Zimmermann
  • Patent number: 8371268
    Abstract: A fuel safety valve arranged in a fuel supply line between a low-pressure pump and a high-pressure pump, is provided with a valve body which defines a cylindrical cavity having a longitudinal axis and being connected to a duct and a portion of a discharge duct in communication with the cylindrical cavity, a piston sliding with respect to the valve body in the cylindrical cavity along the longitudinal axis, and a spring housed in a variable-volume chamber defined by a portion of the cylindrical cavity between the piston and a closure element. The piston is provided with a through hole supplied with the fuel leading into the variable-volume chamber, and the valve body being provided with a fuel discharge hole connecting the variable-volume chamber to the discharge duct.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: February 12, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Mariacarmela Masellis, Benedetto Loiacono, Thomas Riedel, Werner Striegel, Nello Medoro
  • Patent number: 8371833
    Abstract: A supply device for the supply of pressure fluid into at least one vehicle brake or into a pressure fluid accumulator, wherein a piston is movably arranged in an accommodating member, a carrier bears a non-return valve arranged coaxially to the piston for the purpose of ventilating a working chamber into which the piston plunges, and wherein a resetting spring is arranged between the carrier and the piston. A multi-piece cage facilitating inserting the resetting spring into the cage parts, the cage parts comprise a fastener that locks the cage due to relative displacement of the cage parts, and the resetting spring is caged and simultaneously elastically preloaded under the relative displacement of the cage parts.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: February 12, 2013
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Dieter Dinkel, Axel Hinz, Albrecht Otto, Hans-Georg Zentgraf, Daniela Zuk
  • Patent number: 8353691
    Abstract: A piston pump for the hydraulic energy supply in a motor vehicle, comprising a piston that is movably arranged in a stepped bore of an accommodating member that is provided with a closure, the piston carries a seat for an elastic sealing element which accommodates the sealing element with axial play, and with radial elastic preload for the purpose of sealing between piston and cylinder. The seat for the sealing element has a structure which generates forces pointing radially towards a piston axis and expanding the sealing element in a radial direction, and that the structure produces an elastic deformation of the sealing element for an increased and dosed sealing contact pressure between piston and cylinder.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: January 15, 2013
    Assignee: Continental Teves AG & Co., oHG
    Inventors: Georg Sonnenschein, Georg Obersteiner, Jurgen Uhlmer, Achim Possmann, Andreas Hettrich
  • Patent number: 8272858
    Abstract: The invention relates to a piston pump for conveying fluids. The piston pump includes a piston, and a pressure chamber located between an intake valve and a discharge valve. The intake valve is arranged between the pressure chamber and a low-pressure zone of the piston pump. The intake valve has a valve body, a closing element, a device for preloading the closing element, and a device for fastening the intake valve to the piston. The fastening device encompasses at least two fastening elements which protrude from the valve body toward the piston. The fastening elements are positioned at a distance from one another, and are fitted with inlets therebetween for supplying fluid. The invention further relates to a piston pump having an intake valve without a spring-biased element.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: September 25, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Andre Bollwerk, Wolfgang Schuller, Horst Beling, Juergen Wagner, Michael Schuessler, Stefan Hallermann
  • Patent number: 8267672
    Abstract: An ultrahigh pressure pump includes a frame; a crankshaft having a journal; and at least one telescoping pump subassembly having inner and outer ends. The outer end is carried by the frame pivot so as to allow pivotal swinging movement of the pump subassembly, and the inner end is attached to the journal. The piston rod can reciprocate relative to the inner bore substantially free from side loads. The pump subassembly includes: an outer member including a cylinder defining an inner bore; and a inner member having a piston rod and a outer sleeve. The piston rod is received in the inner bore and the cylinder is received in the outer sleeve. First and second restraining elements are disposed at spaced-apart positions along the axis of the pump subassembly and are configured to oppose misalignment forces between the piston rod and the cylinder.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: September 18, 2012
    Inventors: Franz W. Kellar, Harold Lloyd Crowder, Jr.
  • Patent number: 8257065
    Abstract: The high pressure lubricant pump for steelworks has a body provided with at least one cylinder, the cylinder having a lubricant intake port and a lubricant delivery port. Within the cylinder a piston is movable to pressurize the lubricant. The cylinder and the piston define a pre-assembled pumping unit removably fixed into a seat of the body.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: September 4, 2012
    Assignee: DROPSA S.p.A.
    Inventor: Walter Divisi
  • Patent number: 8240513
    Abstract: A dispenser for dispensing liquids including an inner displacement member nested in an outer displacement member. The inner member is moveable between two end positions within the outer member by an actuator. The actuator is arranged to move the outer displacement member into a dispensing position when the inner displacement member is in one of its end positions. The displacement members can be pistons and/or bellows.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: August 14, 2012
    Assignee: Fluid Management Operations LLC
    Inventors: Mark Voskuil, Jan Post, Mart Verschoor
  • Patent number: 8231361
    Abstract: A hydrostatic pump (1) with a variable displacement volume can be operated in a closed circuit and is driven by a drive engine (2), in particular by an internal combustion engine. To control the displacement of the pump (1), a control device (4) is provided which can be actuated as a function of the speed-dependent control pressure which is a function of the speed of the drive engine (2). To improve the control characteristics of the pump, a switchover device (35) is provided, by which the pump (1) can be switched between a speed-dependent displacement control by the speed-dependent control pressure and a volume flow-dependent delivery control, in which the control device (4) of the pump (1) can be controlled as a function of the actuation of an actuator mechanism (28).
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: July 31, 2012
    Assignee: Linde Material Handling GmbH
    Inventors: Martin Steigerwald, Burkhard Sturmer
  • Patent number: 8011907
    Abstract: A piston pump having a retaining device for retaining a spring element for restoring a closing element of a valve; the retaining device includes a receiving region for receiving and bracing the spring element and an integrally formed sealing region, in order to seal off a pressure chamber from a low-pressure region of the piston pump.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: September 6, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Rene Schepp, Wolfgang Schuller, Juergen Reiner
  • Patent number: 7950910
    Abstract: A piston cartridge having a piston chamber, an inlet port, an outlet port, and a piston moveable between a first position and a second position. Also, the cartridge includes a first barrier positioned between the piston and the inlet port and a first sealing member moveable between the first barrier and the inlet port, wherein the first sealing member seals the inlet port when positioned adjacent to the inlet port but allows the fluid into the chamber when positioned adjacent to the first barrier. In addition, the cartridge also includes a second barrier positioned adjacent to the outlet port and a second sealing member moveable between the piston and the second barrier, wherein the second sealing member seals the outlet port when positioned adjacent thereto but allows the fluid to pass through the outlet port when positioned adjacent to the second barrier.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: May 31, 2011
    Assignee: SPX Corporation
    Inventors: Douglas Miller, Michael Landrum, Donald E. Blackman, James M. Heim
  • Patent number: 7891959
    Abstract: A piston pump includes a pump housing having a suction port and a discharge port. A piston is mounted in a bore of the pump housing and forms a pump chamber. Suction and discharge valves are provided on the opposite sides of the pump chamber, respectively. The suction valve includes a retainer which is mounted on the piston and has a valve bore which communicates with the suction port, a valve seat which is formed at the pump chamber end of the valve bore, and a valve body holding portion and a spring holding portion. The suction valve also includes a valve body which can seat and unseat from the valve seat and which is received and held by the valve body holding portion, and a spring which is received and held by the spring holding portion and biases the valve body towards the valve seat.
    Type: Grant
    Filed: February 7, 2006
    Date of Patent: February 22, 2011
    Assignee: Advics Co., Ltd.
    Inventors: Tomoo Harada, Junichi Maeda
  • Patent number: 7874814
    Abstract: In an electrically-driven piston pump including a fluid reservoir for retaining fluid that has leaked into a cam chamber, at an edge between a side wall surface of the cam chamber and the fluid reservoir, an upper edge, which is positioned on the upper side, is arranged so as to extend downward from the electric motor side toward the side away from the electric motor. With this arrangement, the fluid that has leaked into the cam chamber from a piston bore flows from the electric motor side toward the side away from the electric motor, coursing along the upper edge due to the gravity, and is thus introduced into the fluid reservoir.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: January 25, 2011
    Assignee: Advics Co., Ltd.
    Inventors: Hirotsugu Mori, Masayuki Hijikata
  • Publication number: 20100310396
    Abstract: The arrangement and the process are applied in a compressor comprising: a cylinder block (2); a movable assembly including a piston (5); and a resonant spring (11) having a first end portion (11a), affixed to the cylinder block (2) by a first fixation means (20), and a second end portion (11b) affixed to the movable assembly by a second fixation means (30). The first or the second fixation means (20, 30) comprises a bearing portion (21, 31) attached around one of the end portions (11a, 11b) of the resonant spring (11) and having a fixation face (21b, 31b), and a bearing receiving portion (22, 32), previously attached to the cylinder block (2) or to the movable assembly and having a junction face (22b, 32b), said fixation and junction faces (21b, 31b, 22b, 32b) being welded together, securing the resonant spring (11) to the movable assembly and to the cylinder block (2), maintaining said movable assembly concentric to the cylinder (2a) and in a predetermined axial positioning.
    Type: Application
    Filed: December 8, 2008
    Publication date: December 9, 2010
    Inventor: Rogerio Ribeiro Morrone
  • Patent number: 7794216
    Abstract: A plunger is inserted into a slide hole of a cylinder body provided between a pressurizing chamber and a drive cam, so as to reciprocate within the slide hole. The drive cam and a coil spring move the plunger toward the drive cam so that fuel is sucked into the pressurizing chamber, and also move the plunger toward the pressurizing chamber so that the fuel in the pressurizing chamber is pressurized. A clearance between the plunger and a wall of the slide hole forms a flow passage of the fuel discharged from the pressurizing chamber. In the high-pressure fuel pump constructed as above, a fluid reservoir is provided in the flow passage. The capacity of the fluid reservoir increases as the plunger moves toward the drive cam, and decreases as the plunger moves toward the pressurizing chamber.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: September 14, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Takeshi Kitamura
  • Patent number: 7789639
    Abstract: A piston pump is proposed, having a pump housing, in which housing a pump piston is guided axially movably, so that upon an actuation of the pump piston, a fluid is pumped from an intake side to a compression side, via a pump chamber bordering on the pump piston, the compression side being provided with an outlet valve, which is preceded by a damping element.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: September 7, 2010
    Assignee: Robert Bosch GmbH
    Inventor: Norbert Alaze
  • Patent number: 7785085
    Abstract: A piston pump includes a pump housing having a suction port, a discharge port, and an internal cavity; a first cylinder member having a cylinder bore; a piston built into the cylinder bore of the first cylinder member to thereby form a pump chamber and adapted to change the volume of the pump chamber by means of axially reciprocating movement; a suction valve provided in the piston; and a discharge valve provided at the discharge side of the pump chamber. A circumferential protrusion is formed externally at an axially intermediate portion of the first cylinder member. The first cylinder member is press-fitted, at the circumferential protrusion, into the internal cavity of the pump housing. A leading end portion of the first cylinder member from which the first cylinder member is inserted into the pump housing has a diameter smaller than that of the internal cavity of the pump housing.
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: August 31, 2010
    Assignee: Advics Co., Ltd.
    Inventors: Junichi Maeda, Toru Fujita
  • Patent number: 7785086
    Abstract: The invention relates to a supply device for the supply of pressure fluid into at least one vehicle brake or into a pressure fluid accumulator, wherein a piston is movably arranged in an accommodating member, a carrier bears a non-return valve arranged coaxially to the piston for the purpose of ventilating a working chamber into which the piston plunges , and wherein a resetting spring is arranged between the carrier and the piston. It is the essence of the invention that a multi-piece cage allows inserting the resetting Spring into the cage parts, the cage parts comprise fastening means that lock the cage due to relative displacement of the cage parts, and the resetting spring is caged and simultaneously elastically preloaded under the relative displacement of the cage parts.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: August 31, 2010
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Dieter Dinkel, Axel Hinz, Albrecht Otto, Hans-Georg Zentgraf, Daniel Zuk
  • Patent number: 7775190
    Abstract: A radial piston pump for supplying fuel at high-pressure to an internal combustion engine has a compression chamber arranged in a displacement housing, a reciprocating piston arranged in a cylinder chamber, a suction valve connected to a fuel supply line and has a spring-loaded closure body, an intermediate piece, a threaded pin and a pressure valve which is connected to a fuel outlet line. The closing body of the suction valve is embodied as a valve end pad with the spring exerting a force on the front end thereof. The valve end pad has a closure collar and at least two channels that are distributed around the periphery and which adjoin the closure collar and a base plate. A stop plate comprising an additional base plate borders the closure collar of the valve end pad as an intermediate piece to which the threaded pin is connected.
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: August 17, 2010
    Assignee: Continental Automotive GmbH
    Inventor: Ngoc-Tam Vu
  • Patent number: 7744353
    Abstract: A fluid pump has a cylinder supporting a plunger and a pump housing formed with dissimilar metals. A pressing mechanism presses the cylinder and the pump housing relative to each other so that a pressurizing chamber is sealed through a pressing surface between the pump housing and the cylinder. The number of seal points can be reduce, and a reduction in reliability can be eliminated while realizing a reduction in weight of the pump housing and a reduction in cost due to increase in cutting capability, by using a soft material such as an aluminum alloy for the pump housing.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: June 29, 2010
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Hiroyuki Yamada, Atsuji Saito, Masayoshi Kotaki, Hiroshi Odakura, Masami Abe
  • Patent number: 7665976
    Abstract: A high pressure fuel pump for an internal combustion engine having a cylinder, a plunger slidably fitted in the cylinder and a seal mechanism for blocking fuel leakage from an end of a sliding portion between the cylinder and the plunger and also for preventing an lubricant for a driving mechanism of the plunger from entering into the cylinder from the end of the sliding portion of the cylinder and the plunger. A holder surrounding the end of the sliding portion of the cylinder and the plunger is provided. The seal mechanism comprises two mutually independent seal devices mounted with a specific spacing in a longitudinal direction from the end of the sliding portion of the cylinder and the plunger along a circumference of the plunger. The two seal devices are held on the circumference of the plunger by the holder surrounding the end of the sliding portion of the cylinder and the plunger while keeping the specific spacing.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: February 23, 2010
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Satoshi Usui, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Masami Abe, Masayoshi Kotaki, Hiroshi Odakura
  • Patent number: 7653958
    Abstract: A steam mop having a main body including a water pump for pumping water from a water tank to a steam generator in response to any movement of the mop is provided. Movement of the mop causes a pump actuator to slide within a frame. The actuator has a camming surface with a pump piston rod biased against the camming surface that causes the pump piston rod to move in and out of a pump cylinder when the actuator moves. This operates a the pump to pump water to the steam generator for feeding steam to a steam pad mounted on a mop steam frame connected to the steam generator outlet.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: February 2, 2010
    Assignee: Euro-Pro Operating, LLC
    Inventors: Maximilian Rosenzweig, Ognjen Vrdoljak
  • Patent number: 7604462
    Abstract: A high pressure pump draws fluid from a fluid inlet into a compression chamber through an inlet chamber. The high pressure pump has a fluid chamber that communicates with the fluid inlet via the inlet chamber. The high pressure pump includes a plunger and a cylinder. The plunger draws fluid from the inlet chamber into the compression chamber when the plunger moves in a drawing direction. The plunger is capable of pressurizing fluid in the compression chamber when the plunger moves in a pressurizing direction. The cylinder movably supports the plunger therein. When the plunger moves in the drawing direction, fluid in the inlet chamber is drawn into the compression chamber, so that fluid flows from the fluid chamber into the inlet chamber.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: October 20, 2009
    Assignee: Denso Corporation
    Inventor: Hiroshi Inoue
  • Publication number: 20090126695
    Abstract: A radial piston pump for supplying fuel at high-pressure to an internal combustion engine has a compression chamber arranged in a displacement housing, a reciprocating piston arranged in a cylinder chamber, a suction valve connected to a fuel supply line and has a spring-loaded closure body, an intermediate piece, a threaded pin and a pressure valve which is connected to a fuel outlet line. The closing body of the suction valve is embodied as a valve end pad with the spring exerting a force on the front end thereof. The valve end pad has a closure collar and at least two channels that are distributed around the periphery and which adjoin the closure collar and a base plate. A stop plate comprising an additional base plate borders the closure collar of the valve end pad as an intermediate piece to which the threaded pin is connected.
    Type: Application
    Filed: April 10, 2007
    Publication date: May 21, 2009
    Inventor: Ngoc-Tam Vu
  • Publication number: 20090097997
    Abstract: A housing has a compression chamber and a first passage, through which the compression chamber communicates with an accumulation chamber. A discharge valve is provided in the first passage and configured to open to supply fuel from the compression chamber to the accumulation chamber in response to increase in pressure in the compression chamber. A second passage is configured to communicate the accumulation chamber with the compression chamber via the discharge valve. A valve element allows fuel flow from the accumulation chamber to the compression chamber. A biasing unit biases the valve element to seat the valve element on a valve seat of the second passage. The sidewall of the valve element and the inner wall defining the second passage therebetween define a throttle midway through the second passage for restricting fuel flow from the accumulation chamber to the compression chamber.
    Type: Application
    Filed: September 16, 2008
    Publication date: April 16, 2009
    Applicants: NIPPON SOKEN, INC., DENSO CORPORATION
    Inventors: Yoshihito SUZUKI, Masayuki Kobayashi, Hiroshi Inoue
  • Patent number: 7513756
    Abstract: A fuel supply pump with a large fuel discharge amount and a tappet structure body, which are suitably used for an accumulated pressure-type fuel injection device that mechanically amplifies pressure, is provided. A fuel supply pump has a tappet structural body and a spring sheet, wherein a penetration portion for allowing passage of a lubricant or a fuel for lubrication therethrough by coordinating the tappet structure and the spring sheet is provided between a spring-holding chamber for holding a spring to be used for pulling up a plunger and a cam chamber for housing a cam to be used for moving the plunger up and down.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: April 7, 2009
    Assignee: Bosch Automotive Systems Corporation
    Inventors: Nobuo Aoki, Kazuya Kubota, Takeshi Terada, Noriyuki Kobayashi
  • Patent number: 7488161
    Abstract: A high pressure pump has a fuel passage and a pump chamber. Fuel flows into the pump chamber through the fuel passage. The high pressure pump includes a valve member and a plunger. The valve member is movable along a movable axis in a substantially axial direction of the valve member for controlling an amount of fuel flowing into the pump chamber through the fuel passage. The plunger is movable substantially along a movable axis in a substantially axial direction of the plunger. The plunger is capable of pressurizing fuel in the pump chamber to discharge fuel in the pump chamber. The movable axis of the valve member is displaced from the movable axis of the plunger substantially in parallel with each other.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: February 10, 2009
    Assignee: Denso Corporation
    Inventors: Hiroshi Inoue, Nobuo Ota, Yoshitsugu Inaguma, Kaoru Oda, Tatsumi Oguri
  • Patent number: 7478998
    Abstract: The invention relates to a supply device for the supply of pressure fluid into at least one vehicle brake, into a pressure fluid reservoir or into a pressure fluid accumulator, with a pressure fluid inlet and a pressure fluid outlet as well as with the following features: a piston is movably arranged in an accommodating member and has at least two hydraulically active diameters for the supply in the direction of the pressure fluid outlet, at least one non-return valve is used for the ventilation of a working chamber into which the piston is immersed. It is the essence of the invention that the piston has a multi-part design and comprises at least two synchronously movable partial pistons, with the first partial piston exhibiting the first hydraulically active diameter, and the second partial piston exhibiting the second hydraulically active diameter.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: January 20, 2009
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Dieter Dinkel, Axel Hinz, Hans-Dieter Reinartz
  • Publication number: 20080307955
    Abstract: A piston pump having a retaining device for retaining a spring element for restoring a closing element of a valve; the retaining device includes a receiving region for receiving and bracing the spring element and an integrally formed sealing region, in order to seal off a pressure chamber from a low-pressure region of the piston pump.
    Type: Application
    Filed: July 14, 2005
    Publication date: December 18, 2008
    Inventors: Rene Schepp, Wolfgang Schuller, Juergen Reiner
  • Publication number: 20080181800
    Abstract: A positive displacement pump (1) for transporting a fluid with automatic adaptation to the compressibility of that fluid has a pumping chamber (15) with a variable volume (V) which is on the one hand delimited by a rigid chamber cover plate (10) and on the other hand by an elastic diaphragm (9), a suction channel (29) which is in flow connection with the pumping chamber (15) for sucking the fluid to be transported into the pumping chamber (15), an outlet channel (24) which is in flow connection with the pumping chamber (15) for discharging the fluid to be transported from the pumping chamber (15), and a drive device (29) for cyclically increasing and reducing the current volume (V) of the pumping chamber (15), with the drive device (29) being connected to the diaphragm (9) by means of a diaphragm connecting element (34; 34a; 34b) which is spring-mounted in the drive device (29) by means of a spring element (33; 33a; 33b).
    Type: Application
    Filed: January 15, 2008
    Publication date: July 31, 2008
    Applicant: Gardner Denver Thomas GmbH
    Inventors: Peter MUSCHALEK, Gunther Erich Schmid
  • Publication number: 20080170953
    Abstract: A combination compressor and vacuum pump apparatus comprising a common drive mechanism, a compressor piston-cylinder unit mechanically coupled to the drive mechanism, the compressor piston-cylinder unit comprising a hollow first piston rod connected to the drive mechanism at a first free end substantially opposite a first piston operable within a first cylinder so as to form the compressor piston-cylinder unit, and a vacuum pump piston-cylinder unit mechanically coupled to the drive mechanism, the vacuum pump piston-cylinder unit comprising a hollow second piston rod connected to the drive mechanism at a second free end substantially opposite a second piston operable within a second cylinder so as to form the vacuum pump piston-cylinder unit, whereby air is pulled into the compressor piston-cylinder unit through the first piston rod for compression therein and air is exhausted from the vacuum pump piston-cylinder unit through the second piston rod.
    Type: Application
    Filed: November 8, 2007
    Publication date: July 17, 2008
    Inventor: Morten A. Lund
  • Patent number: 7367788
    Abstract: A pump including a main body having a piston provided in a portion of the main body, the piston being configured to reciprocate linearly. A piston spring may be provided within the main body and configured to bias the piston toward an end of the main body. Further, a plurality of intake check valves may be positioned radially within the main body and configured to move in a direction generally perpendicular to the linearly reciprocating direction of the piston such that brake fluid is introduced into the main body. Additionally, the pump may include an exhaust check valve configured to exhaust brake fluid from an inside of the main body to an exterior of the main body by moving an exhaust check ball in the linearly reciprocating direction of the piston.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: May 6, 2008
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Young-Kyu Kim
  • Patent number: 7364410
    Abstract: A pressure storage structure for use in air is disclosed.
    Type: Grant
    Filed: September 22, 2004
    Date of Patent: April 29, 2008
    Inventor: Dah-Shan Lin
  • Patent number: 7318539
    Abstract: A battery operated, handheld fluid dispenser comprises a supply container having a body portion and a narrow neck extending upwardly therefrom. A pump and discharge unit is mounted on the upper end of the neck and comprises a pump diaphragm and pump chamber for pumping liquid from the container to a discharge nozzle. A battery powered pump drive unit is mounted on the container and comprises an electric motor having an output shaft coupled with the pump diaphragm through a cam and cam follower arrangement to displace the diaphragm through a pump stroke when the motor is energized. The cam is rotatably driven by the motor, and the cam follower is attached to the diaphragm, whereby rotation of said cam axially displaces the diaphragm, and the cam and cam follower have interengaging dual cam faces for balancing lateral forces therebetween during rotation of said cam relative to said cam follower.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: January 15, 2008
    Assignee: Power Sprayer LLC
    Inventors: Marc L. Vitantonio, Craig M. Saunders, Donald C. Fuchs, Jr., Daniel J. Wanhainen
  • Publication number: 20080003122
    Abstract: A liquid pump includes an electronically controlled throttle inlet valve to control pump output. With each reciprocation cycle, a plunger displaces a fixed volume of fluid. When less than this fixed volume is desired as the output from the pump, the electronically controlled throttle inlet valve throttles flow past a passive inlet check valve to reduce output. As a consequence, cavitation bubbles are generated during the intake stroke. Cavitation damage to surfaces that define the inlet port passage are avoided by a specifically shaped and sized cavitation flow adjuster extending from the valve member of the passive inlet check valve. By positioning the cavitation flow adjuster in the inlet port passage, a flow pattern is formed in a way to encourage cavitation bubble collapse away from surfaces that could result in unacceptable cavitation damage to the pump.
    Type: Application
    Filed: June 29, 2006
    Publication date: January 3, 2008
    Inventors: Ye Tian, Alan R. Stockner, David C. Mack