Having Pulsation Dampening Fluid Receiving Space Patents (Class 417/540)
  • Patent number: 10982631
    Abstract: A pulsation damper includes: a case in which a fuel chamber is defined; and a damper unit arranged in the fuel chamber to attenuate pressure pulsation of fuel. The damper unit has a diaphragm that is elastically deformed by receiving pressure of fuel, and a plate having a rigidity higher than that of the diaphragm. A gas chamber is defined between the diaphragm and the plate joined with each other.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: April 20, 2021
    Assignee: DENSO CORPORATION
    Inventors: Daisuke Kashiwagi, Hiroyuki Shimai
  • Patent number: 10900451
    Abstract: The invention relates to a high-pressure fuel pump (10) having a housing (12) in which a pressure-limiting valve (38) is arranged in a bore (36), wherein the bore (36) leads into an inflow volume (30) of a low-pressure inflow (22).
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: January 26, 2021
    Assignee: VITESCO TECHNOLOGIES GMBH
    Inventors: Max Scheller, Andreas Ellenberg, Yury Mikhaylov
  • Patent number: 10883463
    Abstract: A housing-includes a pressurizing chamber. A plunger is moved to increase and decrease a volume of the pressurizing chamber, so that the plunger can pressurize the fuel in the pressurizing chamber. A fuel chamber forming portion is placed on a radially outer side of the plunger and forms a fuel chamber that is communicated with the pressurizing chamber. A pulsation damper is placed in an inside of the fuel chamber and is operable to reduce pressure pulsation of the fuel in the fuel chamber. Fixable portions are placed on a radially outer side of the plunger while each of the fixable portions includes a receiving through-hole. The fixable portions are fixed to an engine with bolts, which are provided to correspond with the receiving through-holes, respectively. The fuel chamber forming portion is displaced from axes of the receiving through-holes.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: January 5, 2021
    Assignee: DENSO CORPORATION
    Inventors: Shinichiro Koshimoto, Masaharu Nakaoka, Shinobu Oikawa
  • Patent number: 10781778
    Abstract: Various embodiments may include a high-pressure fuel pump with: a pump housing including a pressure chamber and a pump piston movable up and down within the pressure chamber along a movement axis; and a low-pressure damper including a damper volume arranged on the pump housing and damper elements distributed symmetrically around a damper longitudinal axis. The damper longitudinal axis is arranged at an angle of between 5° and 175° in relation to the movement axis.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: September 22, 2020
    Assignee: VITESCO TECHNOLOGIES GMBH
    Inventors: Detlef Haupt, Yavuz Kurt, Bernd Wöllisch
  • Patent number: 10697414
    Abstract: Various embodiments include a high-pressure fuel pump for a fuel injection system comprising: a housing defining a housing bore with a pressure chamber in a first end region and a leakage chamber in a second end region; a pump piston, during operation of the high-pressure fuel pump moved in translation between the pressure chamber and the leakage chamber along an axis; wherein the leakage chamber includes a leakage collecting region and an equalizing region arranged in circular annular fashion around the pump piston guiding section and extending parallel to the axis from the leakage collecting region toward the pressure chamber; and a low-pressure damper arranged in the equalizing region, the low-pressure damper comprising an annular piston damper and an annular piston guided to move along the axis within an annular bushing.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: June 30, 2020
    Assignee: VITESCO TECHNOLOGIES GMBH
    Inventors: Yury Mikhaylov, Thomas Fuchs
  • Patent number: 10662931
    Abstract: A diaphragm cell for damping pressure pulsations in a low-pressure region of a piston pump has two axially deformable diaphragms that are connected along their radial peripheries and enclose a gas space. The diaphragms each have a central region that extends over no less than 50% of the cross-sectional surface area of the diaphragms. The diaphragms are of undulating shape in the central region, which is curved axially outwards in its radially inner region and in its radially outer region. The diaphragms further include an axially inwardly curved annular region that is arranged between and immediately adjacent to the radially inner region and the radially outer region. An axially-measured amplitude of the wave shape has a predetermined range related to the cross-sectional surface area of the diaphragms when the pressure difference is zero. The pressure difference is a pressure in the gas space minus a pressure outside the gas space.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: May 26, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Viktor Schretling, Tobias Schenk
  • Patent number: 10495042
    Abstract: Peripheral sections of two diaphragms are stacked on each other. The peripheral sections of the two diaphragms form an outer rim of a diaphragm damper. The outer rim is continuously sealed and joined by laser welding over the entire circumference of the outer rim. The thickness of the tip of the outer rim is set in correspondence with the spot diameter of a laser beam at the tip of the outer rim. A weld bead is formed by welding in the entire area of the tip of the outer rim.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: December 3, 2019
    Assignee: Eagle Industry Co., LTD.
    Inventors: Toshiaki Iwa, Yoshihiro Ogawa, Yasushi Fujiwara, Yusuke Sato
  • Patent number: 10413875
    Abstract: An arrangement for adding a first fluid component into a flow system, said arrangement comprising: a first pump provided in a first component adding fluid line which is connecting a first system fluid line of the flow system with a first fluid component source comprising the first fluid component to be added into the flow system; and a second pump provided in a second component adding fluid line connected in parallel with the first component adding fluid line, said second component adding fluid line connecting the first system fluid line of the flow system with a first fluid component source comprising the first fluid component to be added into the flow system.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: September 17, 2019
    Assignee: GE HEALTHCARE BIO-SCIENCES AB
    Inventors: Jan-Erik Pettersson Lynga, Asa Dahlstedt Hagman
  • Patent number: 10208738
    Abstract: The present invention provides a fuel supply system having improved assembly and pulsation reducing efficiency. A housing (20) of a fuel supply system (1) is formed by joining a first housing member (20a) forming one end side of a tubular chamber (23) in the direction of the backward and forward movement of a plunger (10) and a second housing member (20b) forming the other end side. A pulsation reducing mechanism (60) includes a tubular bellows damper (61) housed in the tubular chamber (23).
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: February 19, 2019
    Assignees: Eagle Industry Co., Ltd., Kelhin Corporation
    Inventors: Kenji Suda, Toshiaki Iwa, Yoshihiro Ogawa, Naoki Murata
  • Patent number: 10195316
    Abstract: Apparatus, system and method for providing pressurized infusion of liquids and, more particularly, providing a stable and pressurized flow of fluid to the eye during surgery. Aspiration fluid may be received via an aspiration line at a first peristaltic pump, where aspiration fluid is transferred to a Venturi tank reservoir coupled to a second peristaltic pump. Fluid from a fluid source is provided via a third peristaltic pump to a pressurized infusion tank. A determination is made if the pressure in the pressurized infusion tank is at a predetermined level, where fluid may be transferred from the pressurized infusion tank to an irrigation line when pressure in the pressurized infusion tank is determined to be at the predetermined level. Alternate activation of a plurality of aspiration and irrigation lines are also provided.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: February 5, 2019
    Assignee: Johnson & Johnson Surgical Vision, Inc.
    Inventors: Collin Eddo, Timothy L. Hunter
  • Patent number: 10132303
    Abstract: In one embodiment, a method of generating net fluid flow in a microfluidic network includes, with a fluid actuator integrated asymmetrically within a microfluidic channel, generating compressive and tensile fluid displacements that are temporally asymmetric in duration.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: November 20, 2018
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Erik D Torniainen, Pavel Kornilovich, David P Markel
  • Patent number: 10066643
    Abstract: A pressure supply device in accordance to one or more aspects includes an elongated body having an internal bore extending from a power end to a discharge end having a discharge port, two or more gas generators connected to the power end and a hydraulic fluid disposed in the bore between a piston and the discharge end. The ignition of one of the gas generators drives the piston to exhaust a partial volume of the hydraulic fluid that is less than the total operational volume of the hydraulic fluid under pressure to operate at a connected device.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: September 4, 2018
    Assignee: Bastion Technologies, Inc.
    Inventors: Charles Don Coppedge, Joseph Reeves, Jayant Ramakrishnan, Jorge Hernandez
  • Patent number: 9933377
    Abstract: A device determines information indicative for a zeta potential at the interface between a solid phase and a liquid phase. The device includes a pressure vessel, in which the liquid phase can be accommodated and a measuring cell, downstream of the pressure vessel and such that it can be brought into fluid communication with the pressure vessel and in which the solid phase can be accommodated. A storage vessel is downstream of and in fluid communication with the measuring cell. A pressure loading apparatus, loads the pressure vessel with a pressure profile with a temporally continuous pressure change so a liquid phase can be conveyed out of the pressure vessel through the measuring cell into the storage vessel. A detection apparatus detects the information indicative for the zeta potential at the measuring cell during the loading of the pressure vessel with the pressure profile.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: April 3, 2018
    Assignee: Anton Paar GmbH
    Inventor: Thomas Luxbacher
  • Patent number: 9874210
    Abstract: A vane fluid pump for a vehicle component has a cam defining a continuous inner wall surrounding a cavity, and an inner rotor supported within the cam. The inner rotor has a cylindrical outer wall defining a series of slots equally spaced about the outer wall. A series of vanes is provided with each vane positioned within a respective slot of the inner rotor and extending outwardly to contact the continuous inner wall of the cam. Each vane provides a fluid barrier between adjacent pumping chambers formed between the cam and the inner rotor. A first vane of the series of vanes defines a passageway thereacross to fluidly connect adjacent pumping chambers. The passageway is configured to disrupt harmonics during operation to reduce pressure ripples and associated tonal noise. At least another vane is configured without any fluid passageways.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: January 23, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Mohammad Ali Moetakef, Minghui Chien
  • Patent number: 9790937
    Abstract: A compressor system and a method of reducing noise in the compressor system. The compressor system includes an inlet port configured to receive gas, an outlet port configured to output compressed gas, and a compressor pump connected to the inlet port via a pneumatic line and to the outlet port. The compressor pump is configured to pressurize gas input through the inlet port and to output a compressed gas through the outlet port. The compressor pump generates noise during operation of the compressor pump. The compressor system further comprises a side-branch resonator having a housing forming a cavity and an elongated member connected to the housing. The elongated member is pneumatically connected to the pneumatic line between the inlet port and the compressor pump. The side-branch resonator is configured to substantially reduce noise generated by the compressor pump, to monitor an operation of the compressor pump, or both.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: October 17, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Mark Steven Morrison
  • Patent number: 9297393
    Abstract: An actuator is equipped with a moveable part 160 that moves according to changes in an intake amount of air, a cylinder 140 that contains air and pumps the air through a fluid pipe 150 to the moveable part 160 according to pressure applied to the air, and a piston 130 that applies pressure to the air in the cylinder 140. Further, the actuator is equipped with a motor 100 that generates rotational force, and a screw 110 and a slide nut 120 that convert the rotational force to a force to move the piston 130. The air is enclosed in the moveable part 160, the cylinder 140 and the fluid pipe 150.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: March 29, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Tetsuro Matsumoto
  • Patent number: 9150091
    Abstract: A liquid pressure circuit is provided in which connecting an accumulator (22) to a high pressure liquid path (Lh) by opening a cut-off valve (24a) and connecting a intake liquid path (Li) to the high pressure liquid path (Lh) by means of a switch valve (24b) enables a pump/motor (M) to be operated as a motor by liquid stored under pressure in the accumulator (22), connecting the accumulator (22) to the high pressure liquid path (Lh) by opening the cut-off valve (24a) and connecting the intake liquid path (Li) to a low pressure liquid path (Ll) by means of the switch valve (24b) enables the pump/motor (M) to be operated as a pump to thus store liquid of a tank (21) under pressure in the accumulator (22), and closing the cut-off valve (24a) and connecting the intake liquid path (Li) to the high pressure liquid path (Lh) by means of the switch valve (24b) enables the pump/motor (M) to rotate without load; it is therefore possible to switch between three circuits, that is, drive (motor operation), regeneration (p
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: October 6, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Tsuneo Endo, Shigeru Ibaraki, Kazutaka Takahashi, Daiki Sato, Seiichiro Ishikawa
  • Patent number: 9109593
    Abstract: A high-pressure pump has: a plunger; a pump body; a cover member for covering the pump body and forming a fuel chamber; a pulsation damper body constructed of upper and lower diaphragms with their peripheral edge portions joined and for reducing pressure pulsation in the chamber, the upper and lower diaphragms trapping gas having a given pressure between them; an upper support member having an upper ring-shaped part and an upper support body, the upper ring-shaped part being joined to the peripheral edge portion of the upper diaphragm, the upper support body extending from the upper ring-shaped part and abutting on the cover member; and a lower support member having a lower ring-shaped part and a lower support body, the lower ring-shaped part being joined to the peripheral edge portion of the lower diaphragm, the lower support body extending from the lower ring-shaped part and abutting on the pump body.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: August 18, 2015
    Assignee: DENSO CORPORATION
    Inventors: Shinobu Oikawa, Takayuki Watanabe, Hiroshi Inoue
  • Patent number: 9057348
    Abstract: A pulsation damper mounted in a fuel chamber (23) of a high-pressure fuel pump (20) is provided with a diaphragm (11) having a flat section (11a) displaced when fuel pressure is applied thereto, a pump cover (10) for supporting the diaphragm (11), and a gas chamber (12) formed by the diaphragm (11) and the pump cover (10). Pressure pulsation occurring in the fuel chamber (23) is suppressed by displacement of the flat section (11a). The diaphragm (11) is formed in a closed-bottomed tubular shape with the flat section (11a) located at the bottom and has a projection (11b) provided to the periphery of the flat section (11a) and projecting to the side opposite to the pump cover (10). A tubular peripheral section extending from the outer periphery of the projection (11b) so as to be vertical to the flat section (11a) is fitted over the pump cover (10). The externally fitting portion of the tubular peripheral section is a joint section (11c) joined to the pump cover (10).
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: June 16, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Usui, Yoshinori Takeuchi, Takeyuki Yabuuchi
  • Patent number: 8991546
    Abstract: A work vehicle comprises a chassis, a compartment, a vibratory power unit positioned in the compartment and mounted to the chassis to move in vibration relative to the chassis, a pump, a fluid attenuator, and a rigid tube. The pump and the fluid attenuator are mounted to the vibratory power unit to move in vibration relative to the chassis. The rigid tube interconnects the pump and the fluid attenuator for fluid communication therebetween.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: March 31, 2015
    Assignee: Deere & Company
    Inventors: Mark E. Hull, Zachary T. Flatley, Richard J. Ginsterblum
  • Patent number: 8955550
    Abstract: A damper device includes a first diaphragm having a first peripheral part, a second diaphragm having a second peripheral part, a first support portion disposed on the opposite side from the second peripheral part with respect to the first peripheral part, and a second support portion disposed on the opposite side from the first peripheral part with respect to the second peripheral part. The first peripheral part and the second peripheral part are supported between the first support portion and the second support portion. Radially outer sections of the first peripheral part, the second peripheral part, the first support portion, and the second support portion are integrally welded with each other.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: February 17, 2015
    Assignee: Denso Corporation
    Inventor: Shinobu Oikawa
  • Publication number: 20150025461
    Abstract: A system for the precise metering and delivery of discrete volumes is described. The system is composed of inexpensive components that can be easily assembled, allowing for cost-effective manufacturing of the system. The system can precisely meter and deliver fluids, solids in particulate or powder form, or alternatively it could mix discrete amounts of fluid and solid. Potential applications for the system and microfluidic device include subcutaneous, long-term, automated drug delivery, such as insulin for diabetics.
    Type: Application
    Filed: July 17, 2014
    Publication date: January 22, 2015
    Inventors: Thomas N. Corso, Colleen K. Van Pelt, Anthony J. Rose, Peter Weisz
  • Publication number: 20150017040
    Abstract: A pulsation dumper configured to reduce a fuel pressure pulsation of fuel flowing in a fuel chamber includes a sealed space in which gas having a predetermined pressure is encapsulated between a first diaphragm and a second diaphragm configured to be resiliently deformable by a fuel pressure pulsation in the fuel chamber. A first resilient member provided in the sealed space abuts against an inner wall of the first diaphragm, and a second resilient member abuts against an inner wall of a second diaphragm. A supporting member provided between the first resilient member and the second resilient member supports an outer peripheral portion of the first resilient member and an outer peripheral portion of the second resilient member. A resonance of first and second diaphragms is restrained by the first and second resilient members. The first and second resilient members do not impair deformation of center portions of the first and second diaphragms.
    Type: Application
    Filed: July 2, 2014
    Publication date: January 15, 2015
    Inventors: Osamu HISHINUMA, Noriya MATSUMOTO, Hiroatsu YAMADA
  • Publication number: 20150017041
    Abstract: A mechanism for reducing pressure pulsation includes a pair of metal dampers formed by joining two disk-shaped metal diaphragms over an entire circumference and forming a hermetically sealed space inside a joined portion. Gas is sealed in the aforementioned hermetically sealed space of the damper, and a pair of pressing members give pressing forces to both outer surfaces of the aforementioned metal dampers at a position at an inner diameter side from the joined portion. The mechanism is unitized, with the pair of pressing members being connected in a state in which they sandwich the metal damper.
    Type: Application
    Filed: September 26, 2014
    Publication date: January 15, 2015
    Inventors: Satoshi USUI, Shingo TAMURA, Katsumi MIYAZAKI, Sunao TAKAHASHI, Masayuki SUGANAMI, Minoru HASHIDA
  • Patent number: 8899940
    Abstract: A fluid flow stabilizing method and a pump having a stabilized fluid flow passage where a process fluid contains suspended solid particles and is subject to pressure oscillations. The method comprises positioning an expandable membrane along the lower transverse surface, inflating the membrane with a compressible fluid, and alternatingly expanding and contracting the membrane to dampen the pressure oscillations and inhibit settling of the solid particles at the lower transverse surface. The pump comprises a stabilizer comprising a compressible fluid in an expandable membrane elongated along the lower transverse surface of a manifold in fluid communication with the fluid end. Another method comprises reciprocating a plunger in the pump to pass a slurry through the manifold, and alternatingly expanding and contracting a stabilizer in the manifold.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: December 2, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Edward Leugemors, Rajesh Luharuka, Hubertus V. Thomeer
  • Patent number: 8876502
    Abstract: A mechanism for reducing pressure pulsation includes a pair of metal dampers formed by joining two disk-shaped metal diaphragms over an entire circumference and forming a hermetically sealed space inside a joined portion. Gas is sealed in the aforementioned hermetically sealed space of the damper, and a pair of pressing members give pressing forces to both outer surfaces of the aforementioned metal dampers at a position at an inner diameter side from the joined portion. The mechanism is unitized, with the pair of pressing members being connected in a state in which they sandwich the metal damper.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: November 4, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Usui, Shingo Tamura, Katsumi Miyazaki, Sunao Takahashi, Masayuki Suganami, Minoru Hashida
  • Publication number: 20140301876
    Abstract: A piston pump, in particular for a hydraulic assembly of an electronically controllable vehicle brake system, includes a cylinder element that has a pressure chamber with an outlet formed on the inside. The piston pump further includes an outlet-restricting element held on the outside of the cylinder element on a component by a first holder.
    Type: Application
    Filed: October 25, 2011
    Publication date: October 9, 2014
    Applicant: Robert Bosch GmbH
    Inventors: Oliver Gaertner, Heiko Jahn, Marc Zimmermann, Daniel Gosse
  • Publication number: 20140212315
    Abstract: A method and system for reducing pulsation in a gas compressor system. A side branch absorber, which may be installed on the lateral piping of either the suction or discharge side of the cylinders, has a hyperbolic horn at the input end. The hyperbolic horn in series with an inlet reducer substantially increases the mass reactance of the resonator and substantially reduces the resonator frequency or the required cavity volume for target resonator frequency. The horn is hyperbolic in the sense that it has a large diameter at the first end tapers to a smaller diameter near the second end.
    Type: Application
    Filed: March 27, 2014
    Publication date: July 31, 2014
    Applicant: SOUTHERN GAS ASSOCIATION GAS MACHINERY RESEARCH COUNCIL
    Inventor: James F. Unruh
  • Publication number: 20140193280
    Abstract: The damper mechanism used for a high-pressure fuel supply pump system is configured so that an outer circumferential surface of a cover in regard to the thickness direction of the base material of the cover engages with the inner circumference of an open end part of a bottomed tubular concave part formed in a damper housing or in a pump housing of the high-pressure fuel supply pump. The total height of the damper as a low-pressure pulsation reducing mechanism can be reduced and the dimensions of the damper in the radial directions can also be reduced. In cases where the damper mechanism is formed integrally with the high-pressure fuel supply pump, the total height of the high-pressure fuel supply pump can be reduced and the dimensions of the damper part in the radial directions can also be reduced.
    Type: Application
    Filed: August 7, 2012
    Publication date: July 10, 2014
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Atsuji Saito
  • Patent number: 8757212
    Abstract: A pulsation damping capsule including at least one hermetically joint-sealed metal membrane housing made of at least two preferably concave hemispheres, the housing being provided for separating an inner space from a surrounding pressure medium, wherein the hemispheres are connected together along a peripheral seam firmly bonded such that the pulsation damping capsule can be compressed and expanded as an energy accumulator with spring elasticity due to the effect of the pressure medium. A pulsation damping device is provided which is both dimensioned to withstand stresses and is simple to produce, the pulsation damping effect of which can be tailored especially easily to the existing conditions. Further disclosed is a pulsation damping module for housing a plurality of pulsation damping capsules.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: June 24, 2014
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Thomas Bartsch, Johann Jungbecker, Peter Schack, Stefan A. Drumm, Stefan A. Schmitt, Georg Halasy-Wimmer, Ronald Kley, Marc Seckner, Jochen Glas, Andreas Kämpfe
  • Patent number: 8740590
    Abstract: A method and system for reducing pulsation in a gas compressor system. A side branch absorber, which may be installed on the lateral piping of either the suction or discharge side of the cylinders, has a hyperbolic horn at the input end. The hyperbolic horn in series with an inlet reducer substantially increases the mass reactance of the resonator and substantially reduces the resonator frequency or the required cavity volume for a target resonator frequency. The horn is hyperbolic in the sense that it has a large diameter at the first end and tapers to a smaller diameter near the second end.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: June 3, 2014
    Assignee: Southern Gas Association Gas Machinery Research Council
    Inventor: James F. Unruh
  • Patent number: 8734139
    Abstract: A fluid pump having a pump housing that includes at least one expansion joint, provides volume compensation, as needed, to adjust for changes in pressure in the pump housing. Various embodiments automatically and passively reduce static pressure in the pump housing associated with a freezing event, thereby preventing damage to the pump head. Volume compensation is achieved by employing, in each expansion joint, a dynamic seal that allows relative movement of two portions of the pump housing, and a bias that provides a selected counter-force to the movement of the housing portions. The subject pumps are particularly suited for use in automotive and other rugged applications, in which fluid pumps may experience recurring freezing events.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: May 27, 2014
    Assignee: Micropump, Inc.
    Inventors: Stephen Michael Burns, Charles F. Carr, David J. Grimes
  • Patent number: 8727753
    Abstract: There is provided an air pump in which vibration noise generated in a drive unit of the pump is suppressed from being transmitted to the outside through a suction passage. A casing of the air pump has a suction port extending from an outer peripheral surface to inner peripheral surface of the casing, a noise reduction wall annularly formed on the outer peripheral surface of the casing such that the suction port opens in a region of the outer peripheral surface of the casing surrounded by the noise reduction wall, and a lid member closing the opening of the top of the noise reduction wall and cooperating with the noise reduction wall and the outer peripheral surface of the casing to define a noise reduction chamber communicating with the suction port. The noise reduction wall has an elongated noise reduction passage extending circumferentially in the noise reduction wall.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: May 20, 2014
    Assignee: Nitto Kohki Co., Ltd.
    Inventors: Shigemitsu Ishibashi, Atsuki Hashimoto
  • Patent number: 8727752
    Abstract: A damper assembly for a fuel pump includes at least one diaphragm assembly formed by joining two metal diaphragms to respective two sides of an imperforate central plate, thereby creating a pair of closely spaced diaphragms, each acting upon its own gas volume. Preferably, the diaphragm assembly has (a) a rigid, relatively thick circular or polygonal central plate, (b) a first circular diaphragm having a rim portion sealingly secured as by welding to the plate and a relatively thin, flexible, convex portion projecting from one side of the plate and defining a first pressurized gas volume, and (c) a second circular diaphragm having a rim portion sealingly secured as by welding to the plate and a relatively thin, flexible, convex portion projecting from the other side of the plate and defining an independent second pressurized gas volume.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: May 20, 2014
    Assignee: Stanadyne Corporation
    Inventor: Robert G. Lucas
  • Publication number: 20140134025
    Abstract: An air compressor device includes a cylinder housing and a supporting plate, a piston engaged in the cylinder housing and moved by a motor, the cylinder housing includes a partition for separating the cylinder housing into an upper compartment and a lower chamber, and a passage formed in the partition for allowing the pressurized air to flow from the chamber into the compartment of the cylinder housing, the compartment of the cylinder housing includes an inner diameter (D) greater than an inner diameter (d) of the chamber of the cylinder housing for allowing the pressurized air in the chamber to easily flow into the compartment of the cylinder housing with a relatively decreased pressure.
    Type: Application
    Filed: October 10, 2013
    Publication date: May 15, 2014
    Inventor: Wen San CHOU
  • Patent number: 8672653
    Abstract: A fuel pump for a direct injection system having: at least one pumping chamber; a piston which is mounted sliding inside the pumping chamber in order to vary cyclically the volume of the pumping chamber; 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 delivery valve which allows exclusively a fuel flow outgoing from the pumping chamber; and a damping device, which is placed along the intake duct upstream of the inlet valve, and comprises at least one elastically deformable damping body that has internally a closed chamber filled with pressurized gas and composed of two metal plates cup shaped and welded together at their annular edges by an annular weld without interruptions.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: March 18, 2014
    Assignee: Magneti Marelli S.p.A.
    Inventors: Luca Mancini, Daniele De Vita, Massimo Mattioli
  • Patent number: 8662868
    Abstract: In a housing, a damper member is placed in a fluid chamber communicated with a pressurizing chamber, at which a plunger is reciprocated to pressurize fuel, and an opening of the fluid chamber is covered with a cover member. The damper member includes first and second-side diaphragms. A first-side support member is located between the damper member and the cover member and is engaged with a first-side outer peripheral portion of the first-side diaphragm and the cover member. A second-side support member is located between the damper member and the housing and is engaged with a second-side outer peripheral portion of the second-side diaphragm and the housing. The first and second-side support members are urged between the housing and the cover member.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: March 4, 2014
    Assignee: Denso Corporation
    Inventors: Shinobu Oikawa, Hiroatsu Yamada, Hiroshi Inoue
  • Patent number: 8613607
    Abstract: A pressure pulsation dampener for use in a gas stream is disclosed herein. The dampener can include a housing with an inlet half and an outlet half having a recess, a shaft hole, and an extension with an outlet port. The inlet half can be secured to the outlet half, and can have an extension with an inlet port, forming a flow path. A choke plate can be disposed in the recess within the flow path. A shaft can be disposed through the outlet half to move the openings. The dampener can include an indicator plate with indicator openings. A fastener can engage the indicator openings and secure to the outlet half. The dampener can have a transducer, a motor connected to the shaft, a motor driver, and a controller in communication with the motor driver for comparing frequency rates to preset limits and activating the motor.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: December 24, 2013
    Inventor: Fred Rusty Darsey
  • Patent number: 8591208
    Abstract: A multi-chambered pulsation absorber for attachment over the valve cap opening of a compressor cylinder. Each chamber is in fluid communication with the valve cap opening (or cylinder internal gas passages) via an associated choke tube. Each pairing of a chamber with a choke tube is tuned, in the manner of a Helmholz resonator, to attenuate and nearly eliminate a different cylinder-related pulsation frequency, such as those resulting from internal cylinder pulsations or cylinder nozzle pulsations.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: November 26, 2013
    Assignee: Southwest Research Institute
    Inventors: Eugene L. Broerman, III, Danny M. Deffenbaugh, Robert J. McKee
  • Publication number: 20130280112
    Abstract: A high-pressure fuel pump includes a pressurizing chamber for pressurizing fuel, an outlet valve for discharging the fuel pressurized in the pressurizing chamber to an outlet passage, a relief passage for connecting the outlet passage located downstream of the outlet valve and the pressurizing chamber with each other while bypassing the outlet valve. A relief valve device is provided in the relief passage and adapted to open when an internal pressure of the outlet passage becomes higher than that of the pressurizing chamber, thereby providing communication between the outlet passage and the pressurizing chamber. The relief valve includes a relief spring mechanism for pressing a relief valve to a relief valve seat. At least the relief spring mechanism among members of the relief valve device is provided outside the pressurizing chamber in the pump body.
    Type: Application
    Filed: June 25, 2013
    Publication date: October 24, 2013
    Inventors: Satoshi USUI, Hiroyuki YAMADA, Kenichiro TOKUO, Toru ONOSE, Masami ABE
  • Patent number: 8562315
    Abstract: A fuel pump includes a housing having therein a suction passage and a pressurization chamber into which fuel from the suction passage flows, a plunger held in the housing to be reciprocable so as to pressurize the fuel flowing into the pressurization chamber, and a diaphragm device located in a suction chamber that is provided in the suction passage. The diaphragm device includes a pair of first and second diaphragms that are arranged to define an inner space therebetween and air-tightly sealed at its entire peripheries. A mass addition member may be attached to an inside surface of at least one of the first and second diaphragms, so that the first and second diaphragms with the mass addition member have different characteristic frequencies. Accordingly, pressure pulsation of the fuel in the suction chamber can be effectively reduced by the pulsation damper.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: October 22, 2013
    Assignee: Denso Corporation
    Inventors: Hiroshi Inoue, Tatsumi Oguri
  • Patent number: 8535027
    Abstract: A hydraulic pump has a rotor and a hollow housing with a main interior chamber. The rotor is rotatably mounted in the main interior chamber. A smaller interior chamber is separated from the main interior chamber such that the smaller interior chamber retains gas therein when the main interior chamber is filled with a liquid.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: September 17, 2013
    Assignee: Marine Canada Acquisition Inc.
    Inventors: Alexander Paramonoff, Robie Ralph
  • Patent number: 8517040
    Abstract: A closed-loop system includes a pump driving a fluid through a series of conduits. A control system is included that minimizes pressure fluctuations in a bootstrap reservoir to maintain a desired minimum pressure at the pump inlet. Moreover, the control system reduces a maximum system pressure by reducing the magnitude of pressure fluctuations encountered by the bootstrap reservoir.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: August 27, 2013
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Kurt J. Doughty
  • Publication number: 20130189141
    Abstract: A drilling fluid pumping system including a pump apparatus with a pumping chamber having an inlet valve and an outlet valve and a dampener system in fluid communication with the pumping chamber for damping the flow of fluid, e.g. drilling fluid, This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b).
    Type: Application
    Filed: March 6, 2013
    Publication date: July 25, 2013
    Applicant: NATIONAL OILWELL VARCO, L.P.
    Inventor: NATIONAL OILWELL VARCO, L.P.
  • Publication number: 20130149177
    Abstract: A mechanism for reducing pressure pulsation includes a pair of metal dampers formed by joining two disk-shaped metal diaphragms over an entire circumference and forming a hermetically sealed space inside a joined portion, with gas being sealed in the aforementioned hermetically sealed space of the damper, has a pair of pressing members which give pressing forces to both outer surfaces of the aforementioned metal dampers at a position at an inner diameter side from the joined portion, and is unitized with the pair of pressing members being connected in a state in which they sandwich the metal damper.
    Type: Application
    Filed: January 31, 2013
    Publication date: June 13, 2013
    Applicant: Hitachi, Ltd.
    Inventor: Hitachi, Ltd.
  • 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: 8430655
    Abstract: A fuel gallery has an inlet opening through which a fuel is introduced therein and a suction opening through which the fuel flows between the fuel gallery and a compression chamber. A pulsation damper is supported in the fuel gallery by a first and a second supporting member. The second supporting member defines an inner fuel chamber and outer fuel chamber which communicates with each other through apertures. The suction opening is located at a side wall of the fuel gallery and the inlet opening is located at a bottom wall of the inner fuel chamber which is defined radially inside of the second supporting member. The fuel discharged into the outer fuel chamber through the suction opening is introduced into the inner fuel chamber through the apertures. A flow velocity of the fuel is decreased and a pressure pulsation reduction effect of the pulsation damper is surely achieved.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: April 30, 2013
    Assignee: Denso Corporation
    Inventors: Masayuki Kobayashi, Tatsumi Ogari, Hiroshi Inoue
  • Patent number: 8419391
    Abstract: A fuel gallery has a first opening port communicated to a variable volume chamber formed at a lower side of a plunger and a second opening port communicated to a fuel pressurizing chamber formed at an upper side of the plunger. A connecting tube member is provided in the fuel gallery for communicating the first and second opening ports with each other. During a fuel amount adjusting stroke, for example, in which the plunger is moved in an upward direction, a part of excessive fuel from the fuel pressurizing chamber is supplied to the variable volume chamber through the connecting tube member and the remaining part of the excessive fuel is discharged from the connecting tube member into the fuel gallery through a communication through-hole formed in the connecting tube member.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: April 16, 2013
    Assignee: Denso Corporation
    Inventor: Hiroshi Inoue
  • Patent number: 8402656
    Abstract: A method of producing a diaphragm damper 1 having a high pressure chamber 3 comprised of two diaphragms 2 with flanges 6 welded together and charged inside with a high pressure gas. The diaphragms 2 are made of magnetically attractable thin metal sheets. A pair of jigs 30, 40 provided to face each other inside the pressure vessel 20 hold the diaphragms 2 by magnetic force. The pressure vessel 20 is sealed and evacuated, then the pressure vessel 20 is charged and pressurized by a mixed gas including helium. After this, the pair of jigs 30, 40 are made to approach each other to make the flanges 6 of the pair of diaphragms 2 come into close contact. Inside the pressure vessel 20, the jigs 30, 40 are simultaneously rotated to rotate the pair of diaphragms 2 and a laser beam is fired at the flanges 6 of the diaphragms 2 to weld the flanges 6 over their entire circumferences.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: March 26, 2013
    Assignee: Eagle Industry Co., Ltd.
    Inventors: Takuji Matsuki, Masahide Shimada
  • Publication number: 20130064698
    Abstract: A fluid feed pump is configured, such that a fluid is fed from an outlet channel of the fluid feed pump through an outlet buffer chamber to a fluid channel. The outlet buffer chamber is designed to have a higher compliance than a compliance of a pump chamber. The driving period of the fluid feed pump is set to a shorter period than a time constant defined by the compliance of the pump chamber and a flow resistance between an inlet of the outlet channel and an outlet of the fluid channel. This enables the fluid to be fed with high efficiency by taking advantage of the pressure oscillation occurring between the pump chamber and the outlet buffer chamber.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 14, 2013
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Atsushi Oshima, Takahiro Matsuzaki, Kazuaki Uchida, Akio Kobayashi