Having Separate Means Biasing Valve Closed Patents (Class 417/549)
  • Patent number: 10041484
    Abstract: A pump is disclosed having a manifold with an inlet, a pressure outlet, and a return outlet. The pump may also have a jacket connected to an end of the manifold to create an enclosure that is in fluid communication with the inlet of the manifold, and at least one pumping mechanism extending from the manifold into the jacket. The at least one pumping mechanism may have an inlet open to the enclosure and an outlet in communication with the pressure outlet of the manifold. The pump may further have a standpipe extending from the manifold into the enclosure. The standpipe may be in communication with the return outlet of the manifold.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: August 7, 2018
    Assignee: Caterpillar Inc.
    Inventors: Joshua W. Steffen, Sunil J. Bean, Adrienne M. Brasche, Cory A. Brown, Sana Mahmood
  • Patent number: 9982671
    Abstract: A valve of a piston pump, in particular for a hydraulic vehicle brake system, includes a closing body configured to be moved in an axially guided manner against a sealing seat. The closing body is formed in two pieces, which include a damping piston and a closing element inserted in the damping piston.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: May 29, 2018
    Assignee: Robert Bosch GmbH
    Inventors: Marc Zimmermann, Oliver Hennig
  • Patent number: 8955601
    Abstract: A method of implementing a substitute for a pump-off controller in a downhole production string, the method including locating a pump and a valve in the production string wherein capabilities include the pump pumping a reservoir product through the valve, the valve transitioning to a bypass mode, and the valve interrupting a reservoir product flow.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: February 17, 2015
    Inventor: Lawrence Osborne
  • Patent number: 8807015
    Abstract: According to one embodiment, there is provide a piston pump, including: a cylinder having a bottomed cylindrical shape; a piston slidable within the cylinder, the cylinder and the piston defining a pressure chamber therebetween; a suction valve unit disposed in a suction passage of the pressure chamber; and a discharge valve unit disposed in a discharge passage of the pressure chamber, wherein the piston includes a cylindrical piston portion and a large diameter piston portion provided to cover one end of the cylindrical piston portion, and wherein the large diameter piston portion includes a working fluid guide groove extending thereinside along the axial direction of the piston.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: August 19, 2014
    Assignee: Nissin Kogyo Co., Ltd.
    Inventor: Masatoshi Iyatani
  • 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: 8784080
    Abstract: A diaphragm pump for a seat adjusting device comprises a diaphragm and a valve member which define a pump chamber therebetween. An inlet valve and an outlet valve are formed on the valve member. A pressure chamber is in fluid communication with the outlet valve and receives fluid discharged from the pump chamber via the outlet valve. One of the diaphragm and the valve member comprises a valve membrane of a pressure relief valve integrated in the pump. The valve membrane is integrally formed with the one of the diaphragm and the valve member. The valve membrane is moveable between a first configuration in which the valve membrane closes a pressure relief channel and a second configuration in which the valve membrane opens the pressure relief channel to allow fluid to be discharged from the pressure chamber.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: July 22, 2014
    Assignee: L&P Swiss Holding AG
    Inventors: Erich Dörfler, Johannes Schwarz, Paul Tindall, Horia Blendea
  • Patent number: 8672418
    Abstract: A sealing structure is provided wherein an annular groove formed in a pump cylinder of a piston pump receives therein a seal ring made of a synthetic resin material and having an inner circumferential surface fluid-tightly contacting an outer circumferential surface of the pump piston and an O-ring arranged on the outer circumferential side of the seal ring and urging the seal ring radially inward. The seal ring is formed at its axial end portions with flange portions for preventing the O-ring from coming off. In the state that the seal ring and the O-ring are fitted in the annular groove, the flange portions do not receive a load from the O-ring, and a surface pressure which the seal ring applies to the outer circumferential surface of the piston at an axial center portion thereof is set to be higher than surface pressures which it applies to the outer circumferential surface of the piston at axial end portions thereof.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: March 18, 2014
    Assignee: Advics Co., Ltd
    Inventors: Tomoo Harada, Tsunekazu Nishida
  • Patent number: 8591209
    Abstract: The invention relates to a pump having a valve through which a fluid can optionally flow. The valve is embodied by a cavity for displaceably guiding a spherical blocking body, and a valve seat that is spatially adapted to the spherical shape of the blocking body. A free space protruding radially outwards from the spherical body is located downstream, directly behind the valve seat, for temporarily receiving the fluid which flows through the valve seat.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: November 26, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Oliver Schmautz, Marc Zimmermann
  • 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: 8491287
    Abstract: A piston pump includes a pump mechanism configured to compress fluid sucked from an inlet port by increasing or decreasing a volume of a pump chamber which faces a front end of a piston by reciprocating the piston housed in a housing, a feed mechanism including a feed ring mounted to an annular groove provided at an outer periphery of the piston and following a motion of the piston, a feed chamber formed between the feed ring and the housing, and a valve portion. The piston pump includes a pressure wall provided at the piston and configured to contact the feed ring to axially move the feed ring, and a restriction portion provided at the feed ring and configured to engage with an outer periphery of the piston at a position approximate to the pressure wall for restricting a radial displacement of the feed ring on the piston.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: July 23, 2013
    Assignee: Advics Co., Ltd.
    Inventors: Kazuyuki Murai, Tomoo Harada
  • 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: 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: 8241020
    Abstract: The present invention relates to a piston pump. A piston with at least one transverse bore and a longitudinal blind bore, has a plate element with an opening, arranged on the piston at an opening of the longitudinal blind bore. The invention includes an inlet valve, an outlet valve, and a pressure chamber arranged between the inlet valve and the outlet valve. The inlet valve has a pretensioning element, a closing element, and a sealing seat, which sealing seat is built on the plate element.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: August 14, 2012
    Assignee: Robert Bosch GmbH
    Inventor: Marc Zimmermann
  • Patent number: 8191733
    Abstract: An arrangement for dispensing color paste, a shading apparatus, a method, a computer program product, and a memory. The arrangement includes a piston pump including a feed channel. The feed channel is provided with a substantially different amount of color paste per travelling length unit when the piston is moving towards the first end of the cylinder than when the piston is moving towards the second end of the cylinder. The arrangement further includes a valve connected to the feed channel, a dispensing channel connected to a first outlet channel of the valve for conveying color paste into a can, and a by-pass feed channel connected to a second outlet channel of the valve for conveying color paste past the can for the paint to be shaded.
    Type: Grant
    Filed: May 5, 2009
    Date of Patent: June 5, 2012
    Assignee: CPS Color Equipment Oy
    Inventor: Tapio Seppänen
  • Patent number: 8043072
    Abstract: A filter to be mounted in a valve seat member for filtering liquid is proposed which can be manufactured without a drawing step, thereby improving productivity and cost performance of a piston pump in which such a filter is mounted. The filter is a flat metal plate including a main body formed with a plurality of filter holes in a central portion thereof, and a plurality of projections integrally and radially outwardly extending from a perimeter of the main body so as to be circumferentially spaced apart from each other. The filter is pushed into a filter mounting hole formed in a valve seat member of a discharge valve in a piston pump with the projections bent toward the opening of the filter mounting hole while being pressed against the inner surface of the filter mounting hole under an elastic restoring force and fixed to the valve seat member.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: October 25, 2011
    Assignee: Advics Co., Ltd.
    Inventors: Junichi Maeda, Tomoo Harada
  • 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: 7938057
    Abstract: The invention relates to a piston pump which is used to guide a fluid and which comprises a cylinder, a piston which is displacably arranged in the cylinder, a return element for the piston and a drive in order to displace the piston in the cylinder. The cylinder comprises a first area having a first internal diameter and a second area having a second internal diameter. The first internal diameter is greater than the second internal diameter.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: May 10, 2011
    Assignee: Robert Bosch GmbH
    Inventor: Marc Zimmermann
  • 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
  • Publication number: 20100284841
    Abstract: The invention relates to a piston pump having a piston assembly including at least one cross bore and a longitudinal bore corresponding to the at least one transverse bore, a cylinder, into which the piston assembly is guided in a longitudinally movable manner, and an inlet valve with a cage element, in which an inlet valve spring and an inlet valve sealing element are disposed, and a corresponding inlet valve seat, which is disposed on the piston assembly. Fluid can be guided through the longitudinal bore into a compression chamber via the inlet valve. A return spring is disposed in the compression chamber for the piston assembly. The invention further relates to an associated braking system. The cage element has a resilient high-pressure sealing element that is configured to receive radially acting power components, and to effect a seal against a cylinder wall via a radial sealing surface, and in order to effect an axial seal against the piston assembly via an axial sealing surface.
    Type: Application
    Filed: September 18, 2008
    Publication date: November 11, 2010
    Inventors: Heiko Jahn, Marc Zimmermann
  • 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: 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
  • Publication number: 20100202908
    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 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: Application
    Filed: April 15, 2010
    Publication date: August 12, 2010
    Applicant: Continental Teves AG & Co. oHG
    Inventors: Dieter Dinkel, Axel Hinz, Albrecht Otto, Hans-Georg Zentgraf, Daniela Zuk
  • Patent number: 7704058
    Abstract: A piston pump including a pump housing, a piston provided at the inner bore of the pump housing and assembled with an annular sealing member to form a pump chamber. The piston is configured to slide at an inner wall of the inner bore. The annular sealing member is assembled with the piston so as to slide at the inner wall of the inner bore in the axial direction together with the piston. And a first sliding range of the piston relative to the inner wall of the inner bore and a second sliding range of the annular sealing member relative to the inner wall of the inner bore do not overlap each other in the axial direction.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: April 27, 2010
    Assignee: Advics Co., Ltd.
    Inventors: Tomoo Harada, Junichi Maeda
  • Patent number: 7690736
    Abstract: In a liquid pump for a braking system of a vehicle, one end of a piston is slidably inserted into a cylindrical space of a housing member, and a sliding ring is provided on the piston. A suction chamber is formed by an inner peripheral surface of the housing member, an outer peripheral surface of the piston and the sliding ring. An inner diameter “Dk” of the housing member is made larger than an inner diameter “Dc” of the cylindrical space. As a result, the volume of the suction chamber is increased, without making the piston smaller in its diameter.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: April 6, 2010
    Assignee: Advics Co., Ltd.
    Inventor: Akihito Kusano
  • Publication number: 20080310979
    Abstract: The present invention relates to a piston pump for delivering hydraulic fluid, including a reciprocating piston for building up pressure in a pressure chamber; a sealing element is situated on the piston; during a compression phase, this sealing element produces a seal between the pressure chamber and a low-pressure region of the piston pump and during an intake phase, it opens a connection between the pressure chamber and the low-pressure region in order to draw hydraulic fluid into the pressure chamber.
    Type: Application
    Filed: July 14, 2005
    Publication date: December 18, 2008
    Inventors: Rene Schepp, Harald Hermann, Georg Blosch
  • Publication number: 20080310971
    Abstract: A piston pump includes a first piston pump including a first piston and a first pump chamber, a second piston pump including a second piston and a second pump chamber, the second piston operating to follow the first piston, a pressure release passage formed in communication with the second pump chamber, and a relief valve provided at the pressure release passage and defining an upper limit discharge pressure of the second piston pump. When a discharge pressure of the second piston pump is equal to or smaller than the upper limit, a discharge fluid of the second piston pump is added to that of the first piston pump so as to flow into an outlet port. When the discharge pressure exceeds the upper limit, the discharge fluid is released to the pressure release passage and the discharge fluid of the first piston pump only flows to the outlet port.
    Type: Application
    Filed: June 13, 2008
    Publication date: December 18, 2008
    Inventor: Tomoo Harada
  • Publication number: 20080206081
    Abstract: A piston pump includes a pump mechanism for changing a volume of a pump chamber to move a piston in a housing, and a feed mechanism that has a feed ring attached to a circular groove portion of the piston to be slaved with a movement of the piston. The feed mechanism is located in a suction passage from a suction port to a pump chamber, and the piston has a flange portion protruding radially outwardly. An inner peripheral surface of the feed ring has an inner-diameter enlarged portion extending radially outwardly to have an enlarged passage portion between the inner peripheral surface of the feed ring and the outer peripheral surface of the piston, and a valve portion for opening and closing a suction passage is constructed of an end portion of the inner diameter enlarged portion of the feed ring and the flange portion.
    Type: Application
    Filed: February 7, 2008
    Publication date: August 28, 2008
    Inventor: Tomoo HARADA
  • Patent number: 7410347
    Abstract: A reciprocating pump includes a drive section and a pump section. The drive section has a reciprocating coil assembly to which alternating polarity control signals are applied during operation. A permanent magnet structure of the drive section creates a magnetic flux field which interacts with an electromagnetic field produced during application of the control signals to the coil. Depending upon the polarity of the control signals applied to the coil, the coil is driven in one of two directions of movement. A drive member transfers movement of the coil to a pump element which reciprocates with the coil to draw fluid into a pump chamber and expel the fluid during each pump cycle. The pump is particularly well suited to cyclic pumping applications, such as fuel injection systems for internal combustion engines.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: August 12, 2008
    Assignee: BRP US Inc.
    Inventor: Martin Radue
  • Patent number: 7390174
    Abstract: A piston pump (10) for a hydraulic consumer of an electronically controlled vehicle brake system, carries a stepped piston (50, 50?) and centers a sealing assembly (26, 26?) which is retained in an axial direction Ax by a step (52, 52?) on the stepped piston (50, 50?), on the one hand, and is retained by a spring cage (53, 53?), on the other hand. The stepped piston (50, 50?) includes a plane support (54, 54?) for plane support legs (55a,b,c; 55a,b,c?) of the spring cage (53, 53?) The stepped piston (50, 50?) includes radially inwards, with respect to the support (54, 54?), a stepped bore (56, 56?), with the bore (56, 56?) accommodating centering legs (57a,b,c; 57a,b,c?) of the spring cage (53, 53?). Coaxially as well as inside the stepped bore (56, 56?), a spring-loaded valve member (59, 59?) of a non-return valve is arranged.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: June 24, 2008
    Assignee: Continental Teves AG & Co., oHG
    Inventors: Dieter Dinkel, Albrecht Otto, Georg Sonnenschein, Hans-Georg Zentgraf, Kristian Tarandek
  • Patent number: 7357626
    Abstract: A suction valve for reciprocating compressor includes a fixation part, which receives a driving force of a reciprocating motor, and is fixed-combined to the front end surface of a piston performing linear reciprocal movement in the cylinder, a switching part for switching a hollow channel formed to penetrate the piston having a certain area, and a plurality of arms for connecting the switching part and the fixation part to make the switching unit behave in a certain displacement section having the fixation part as a fixed point. Receiving driving force of the reciprocating motor, the piston is bent and straighten by the pressure difference, and stress is distributed evenly in the above process, and minimizing bulking phenomenon to prevent damage of a switching part. Also, the responsiveness of the valve can be improved.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: April 15, 2008
    Assignee: LG Electronics, Inc.
    Inventors: Kyung-Seok Kang, Seong-Yeol Hyeon, Sung-Tae Woo
  • Publication number: 20080031754
    Abstract: A piston pump including a pump housing, a piston provided at the inner bore of the pump housing and assembled with an annular sealing member to form a pump chamber. The piston is configured to slide at an inner wall of the inner bore. The annular sealing member is assembled with the piston so as to slide at the inner wall of the inner bore in the axial direction together with the piston. And a first sliding range of the piston relative to the inner wall of the inner bore and a second sliding range of the annular sealing member relative to the inner wall of the inner bore do not overlap each other in the axial direction.
    Type: Application
    Filed: August 1, 2007
    Publication date: February 7, 2008
    Inventors: Tomoo Harada, Junichi Maeda
  • Patent number: 7241120
    Abstract: A piston machine includes a cylindrical wall (2) defining a swept volume (1) and having a plurality of gas inlet openings (5), and a piston (3) reciprocating in the swept volume (1), and the piston head (12) of which is formed as a valve having a plurality of openings (14) provided in the piston head (12), and a forcelocking device (16, 21; 18, 24) for retaining the plurality of openings (14) in one of their open condition and closed condition.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: July 10, 2007
    Assignee: Pfeiffer Vacuum GmbH
    Inventors: Eckard Bez, Thorsten Burggraf, Stefan Zabeschek
  • Patent number: 7165951
    Abstract: A high-pressure fluid is continuously generated with high efficiency without causing pulsation of pressure by reciprocally moving a piston having first, second and third chamber sections under the control of an actuator including an operating pressure source and a directional control valve. With the reciprocating motion of the piston, liquid or fluid such as gas is fed into the first, second and third chamber sections in sequence through check valves and finally discharged outside at high pressure. The actuator is operated hydraulically, mechanically or electrically.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: January 23, 2007
    Inventors: Mitsuharu Magami, Naoyuki Magami, Takuya Magami
  • Patent number: 6792968
    Abstract: A pump assembly flows pressurized engine oil to hydraulic injectors in a diesel engine. The assembly includes a high-pressure pump with a bored piston passage. The outer end of the piston bore is closed by a plug assembly pressed in the bore.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: September 21, 2004
    Inventor: Robert H. Breeden
  • Publication number: 20040146418
    Abstract: A suction valve for reciprocating compressor includes a fixation part, which receives a driving force of a reciprocating motor, and is fixed-combined to the front end surface of a piston performing linear reciprocal movement in the cylinder, a switching part for switching a hollow channel formed to penetrate the piston having a certain area, and a plurality of arms for connecting the switching part and the fixation part to make the switching unit behave in a certain displacement section having the fixation part as a fixed point. Receiving driving force of the reciprocating motor, the piston is bent and straighten by the pressure difference, and stress is distributed evenly in the above process, and minimizing bulking phenomenon to prevent damage of a switching part. Also, the responsiveness of the valve can be improved.
    Type: Application
    Filed: November 24, 2003
    Publication date: July 29, 2004
    Inventors: Kyung-Seok Kang, Seong-Yeol Hyeon, Sung-Tae Woo
  • Patent number: 6764286
    Abstract: A piston pump comprises cylinder attached within a cavity of a pump housing. An outlet check valve seat is defined about an outlet of the cylinder. A piston is slidably received in a bore of the cylinder and has a first passageway formed therein. A cylinder head encloses the outlet of the cylinder and defines a second passageway therein. The first passageway has an inlet in fluid communication with the cavity of the pump housing, and an outlet in fluid communication with a pumping chamber defined in the pump housing. A first spring retains the piston to the cylinder. A first check valve member is a ball retained near a valve seat formed in the first passageway of the piston by a disk spring, and allows fluid to flow only from the inlet to the outlet of the piston.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: July 20, 2004
    Assignee: Kelsey-Hayes Company
    Inventors: Harry A. Hunnicutt, Richard J. Barron, Peter Every
  • Patent number: 6695596
    Abstract: In a suction valve apparatus of a reciprocating compressor including a piston having a gas passage at which gas flows inside its body portion, a valve seat formed at an end of a piston body to open the gas passage and a step face formed so as to have a thickness inward from the valve seat and have a plurality of gas through holes and a mounting through hole, and a valve cone having a detachable coupling portion formed extendely from a cone portion corresponded to the valve seat of the piston and inserted into the mounting through hole of the step face of the piston so as to be movable, a re-expansion loss can be reduced by minimizing a dead volume of a suction gas valve, an efficiency of a reciprocating compressor can improve by reducing a heat transmission loss by sucking refrigerant gas through the plurality of gas through holes of the step face from the gas passage.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: February 24, 2004
    Assignee: LG Electronics Inc.
    Inventors: Won-Sik Oh, Jung-Sik Park
  • Patent number: 6676389
    Abstract: The invention relates to a piston pump for increasing pressure for liquids, in particular for the camshaft phase adjustment of reciprocating internal combustion engines, said piston pump advantageously being integrated into the housing of the cylinder head. The piston pump for increasing pressure is defined in that it increases an existing fluid pressure to a required fluid pressure and keeps this pressure virtually constant. The piston pump for increasing pressure is advantageously pre-assembled in a sleeve.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: January 13, 2004
    Assignee: Ford Global Technologies, LLC
    Inventor: Guenter Bartsch
  • Patent number: 6652245
    Abstract: The invention relates to a piston pump for a hydraulic, slip-controlled vehicle brake system. The piston pump has a piston, which is inserted with a part of its length into a sleeve. A tubular filter that encompasses the piston is attached to the sleeve and constitutes a captive retainer, which secures the piston in a captive fashion in the sleeve. In order to reduce an axial mobility of a sealing ring that seals the piston in the pump housing, the invention proposes attaching the filter, which limits the axial mobility of the sealing ring, to the sleeve in an axially mobile fashion.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: November 25, 2003
    Assignee: Robert Bosch GmbH
    Inventors: Manfred Hauser, Norbert Alaze, Thorsten Duermeier, Ursula Eckstein, Erika Mank
  • Patent number: 6648614
    Abstract: The present invention relates to a piston pump, which is in particular appropriate for the pressure fluid delivery in electronically controlled brake systems, including a housing, a suction valve, a pressure valve, and a pump piston that is designed as a stepped piston having a large-diameter portion and a small-diameter portion. According to the present invention, the stepped piston at its large-diameter portion is guided in a pump cartridge. Preferably, the pressure valve is designed additionally at the cartridge in a radial direction relative to the direction of movement of the stepped piston.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: November 18, 2003
    Assignee: Continental Teves AG & Co. OHG
    Inventors: Axel Hinz, Hans-Dieter Reinartz
  • Patent number: 6634872
    Abstract: The invention relates to a pump of the type comprising a cylindro-conical body (1) defining a metering chamber (10) closed at its bottom portion by an inlet valve (11) and at its top portion by a moving piston (2) co-operating with resilient return means (3) while being carried axially by a nozzle tube (4) having a top end that projects outside the pump body and having a bottom end that is provided with at least one delivery orifice (40), the pump being characterized in that said piston (2) is slidably mounted firstly about the tube (4) between a closure position closing the delivery orifice (40) and an open position in which said orifice is fully open, and secondly in sealed peripheral contact with the inside wall of said chamber (10) between a top end-of-stroke abutment and a bottom end-of-stroke abutment; the coefficient of friction between the piston (2) and the tube (4) being less than the coefficient of friction between said piston (2) and the inside wall of the body (1).
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: October 21, 2003
    Assignee: Rexam Sofab
    Inventors: Jean-Louis Bougamont, Christophe Roy
  • Patent number: 6589032
    Abstract: A pump and a pump piston assembly. The pump piston assembly includes a pump piston, a pump check valve, and a spring. The pump piston has a piston bore extending from a first piston end toward a second piston end. The pump check valve is positioned proximate the first piston end. The spring has an attached portion attached to the pump piston proximate the first piston end and has a biasing portion biasing the pump check valve to fluidly block the piston bore. The attached portion of the spring is closer to the second piston end than is the biasing portion of the sprint. The pump includes the pump piston assembly and a pump sleeve, wherein the pump piston is slidably engaged in the sleeve bore of the pump sleeve.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: July 8, 2003
    Assignee: Delphi Technologies, Inc.
    Inventors: Herbert Stanley Summers, III, David Fredrick Reuter
  • Patent number: 6585500
    Abstract: A valve fastening structure of a reciprocating compressor is provided. The valve fastening structure of the reciprocating compressor includes a piston, which is combined with a moving magnet of a driving motor and is in a linear reciprocating motion inside a cylinder and in which a refrigerant channel is formed in the direction of the reciprocating motion, a suction valve arranged in the leading end of the piston, the suction valve for opening and shutting the refrigerant channel of the piston, and magnets inserted into and fixed to the leading end of the piston, the magnets for fixing the suction valve by magnetic force. It is possible to minimize dead volume in the cylinder and to easily control the stroke of the piston by establishing the suction valve as the cardinal point during the controlling of the stroke of the piston. Accordingly, the efficiency of the compressor is improved.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: July 1, 2003
    Assignee: LG Electronics Inc.
    Inventors: Kyeong Bae Park, Jong Tae Heo
  • Patent number: 6514056
    Abstract: A piston pump for a slip-controlled, hydraulic brake system of a vehicle. A hollow piston is provided with an inner piston seal that has a sealing lip. During an upward reciprocating motion of the piston, fluid can flow past the sealing lip in a direction of a piston inner (displacement chamber) and constitutes an inlet valve of the piston pump. During a downward movement of the piston the sealing lip is forced by pressure against an inner surface of the piston to prevent a flow of fluid past the sealing lip. The invention obviates the need for a separate inlet valve and makes it possible for the piston pump to be short in length.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: February 4, 2003
    Assignee: Robert Bosch GmbH
    Inventors: Wolfgang Schuller, Beate Schumann
  • Patent number: 6514055
    Abstract: The invention relates to a piston pump for a slip-controlled hydraulic vehicle brake system. For the sake of a short structural length of the piston pump, piston of the piston pump is a hollow piston, whose interior forms a positive displacement chamber of the piston pump. The piston can be produced economically as a reshaped part, for instance by deep drawing.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: February 4, 2003
    Assignee: Robert Bosch GmbH
    Inventor: Wolfgang Schuller
  • Publication number: 20030012670
    Abstract: A pump and a pump piston assembly. The pump piston assembly includes a pump piston, a pump check valve, and a spring. The pump piston has a piston bore extending from a first piston end toward a second piston end. The pump check valve is positioned proximate the first piston end. The spring has an attached portion attached to the pump piston proximate the first piston end and has a biasing portion biasing the pump check valve to fluidly block the piston bore. The attached portion of the spring is closer to the second piston end than is the biasing portion of the sprint. The pump includes the pump piston assembly and a pump sleeve, wherein the pump piston is slidably engaged in the sleeve bore of the pump sleeve.
    Type: Application
    Filed: July 13, 2001
    Publication date: January 16, 2003
    Inventors: Herbert Stanley Summers, David Fredrick Reuter
  • Patent number: 6499974
    Abstract: A piston pump having a piston axially movable against the force of a spring within an operating chamber connected via check valves to an operating cylinder and a hydraulic medium supply. A section of the piston that extends into the operating chamber has a reduced diameter extension which extends from a shoulder of the piston that delimits the operating chamber. The extension includes a thickened free end having a sealing surface facing the shoulder. A valve disk is located and guided on the extension in a gap between the shoulder and sealing surface and is capable of axially reciprocating movements thereon. The valve disk is provided with openings which provide a passageway for hydraulic medium from the operating chamber to a second check valve. The openings are blocked when the valve disk abuts the sealing surface.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: December 31, 2002
    Assignee: Holger Clasen KG (GmbH & Co.)
    Inventor: Björn Bach