Valved Piston (222) Patents (Class 91/422)
  • Patent number: 11498161
    Abstract: A portable press is usable with parts that are assembled by interference fit or friction fit. A force application member slidably engages a plurality of guides. An actuator, such as a pneumatic or hydraulic jack or cylinder, applies force to the force application member to move the force application member toward a static plate. The force application member acts to either press in, or press out, a first part relative to a second part. The press of the invention is portable, so that the press can be moved to the mechanical structure requiring a press for removal or insertion of parts. The press may be constructed in a vertical or horizontal embodiment.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: November 15, 2022
    Inventor: Henry Bostic
  • Patent number: 10948028
    Abstract: A driveline component with a shaft, a friction clutch and a centrifugal valve. The shaft has a supply passage and a feed passage that intersects the supply passage. The centrifugal valve has a valve seat, which is formed on the shaft and intersects the feed passage, a valve element and a flyweight that is pivotally coupled to the shaft. The valve element is received in the valve seat and is movable between a first position, in which the valve element is abutted against the valve seat, and a second position in which the valve element is displaced from the valve seat. The flyweight has a weight and a cam and is configured so that radially outward rotation of the weight in response to centrifugal force causes the cam to drive the valve element toward the first position.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: March 16, 2021
    Assignee: BorgWarner Inc.
    Inventors: Larry A. Pritchard, Robert F. Keller, Christopher Sullivan
  • Patent number: 10920802
    Abstract: A harvester head having at least one hydraulic actuator with a cylinder and a piston. The hydraulic actuator having at least a cylinder chamber and a piston rod chamber, both chambers being connected to a hydraulic circuit. The piston separating the cylinder chamber and the piston rod chamber, a cavity provided in the piston, hydraulically connecting the cylinder chamber with the piston rod chamber and a check valve in connection with the cavity that allows hydraulic medium flow in an opening direction of the check valve.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: February 16, 2021
    Assignee: DEERE & COMPANY
    Inventors: Arto Alfthan, Timo Neuvonen, Joni Turunen, Samuli Jormanainen, Esa Jääskeläinen
  • Patent number: 10746202
    Abstract: In one aspect, a piston assembly for a fluid-driven actuator may include a piston defining a passage extending between first and second chambers of the actuator. The piston assembly may further include a valve having a valve head and a valve stem. The valve may be positioned within the passage and slidable between an open position and a closed position. The valve stem may extend outward from the passage into the second chamber when the valve is positioned in the closed position. Additionally, the piston assembly may include a spring compressed between the valve head and the piston. The spring may be configured to bias the valve to the closed position. The valve may be configured to move to the open position when a pressure in the second chamber exceeds a pressure threshold or when the valve stem contacts a cylinder of the fluid-driven actuator.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: August 18, 2020
    Assignee: CNH Industrial America, LLC
    Inventor: James L. Tetrick
  • Patent number: 10532506
    Abstract: A clamp assembly for an injection molding machine includes (a) a clamp cylinder housing and (b) a clamp piston affixed to an end portion of a tie bar and slidable within the housing among a clamping position, a mold break position, and a meshing position disposed axially intermediate the clamping and the mold break positions. The clamp assembly further includes (c) a clamp chamber for urging the clamp piston towards the clamping position when pressurized; (d) a return device for urging the clamp piston towards the meshing position when pressure in the clamp chamber is relieved; and (e) a mold break chamber for urging the clamp piston towards the mold break position when pressurized. The mold break chamber is bounded axially by opposed surfaces of the tie bar and the return device.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: January 14, 2020
    Inventors: Carsten Link, Robert D. Schad, Luke Osmokrovic
  • Patent number: 10480548
    Abstract: A hydraulic actuator to which a limit-adjustable mechanical lock device is applied, comprising: a housing having a first hole; side covers coupled at both sides of the housing, and having holder insertion holes formed to be opened toward the first hole side of the housing, and plugs; a first holder of which one side of the outer peripheral surface is inserted into the holder insertion hole at the plug side of the side cover by screw coupling; a second holder fitted and coupled to the inner peripheral surface of the side cover and having one end thereof screw-coupled to the second hole of the first holder; a locking means into which a rod is inserted so as to be movable in an axial direction at a predetermined distance across the second hole of the first holder and the third hole of the second holder.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: November 19, 2019
    Inventor: Yong Jun Lee
  • Patent number: 9944375
    Abstract: A system for controlling trim position of a marine propulsion device on a marine vessel includes a trim actuator having a first end configured to couple to the marine propulsion device and a second end configured to couple to the marine vessel. A controller controls position of the trim actuator between an extended position wherein the propulsion device is trimmed up with respect to the vessel and a retracted position wherein the propulsion device is trimmed down with respect to the vessel. A shock relief mechanism overrides position control by the controller and allows extension of the trim actuator upon the occurrence of an overpressure event. An arresting mechanism, when activated, prevents extension of the trim actuator beyond a certain limit. The controller selectively activates the arresting mechanism in response to a determination that the propulsion device is being commanded in reverse. Methods for controlling trim position are also included.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: April 17, 2018
    Assignee: Brunswick Corporation
    Inventors: Justin Martin, Daniel P. Klawitter, Flint Grahl, John A. Groeschel
  • Patent number: 9157433
    Abstract: A pressure-controlling appliance for an inflatable product has a inflatable body, a pump mounted in the inflatable body, a pump switch and an inflation-deflation valve. The pump inflates or deflates the inflatable bodythrough the inflation-deflation valve. The pressure-controlling appliance also comprises an inflation-deflation controlling mechanism and a pressure-controlling mechanism. The inflation-deflation controlling mechanism is applied to open and close the inflation-deflation valve and to turn the pump switch on or off. The pressure-controlling mechanism operates the inflation-deflation controlling mechanism according to the pressure in the inflatable body that compared with the high or low reference pressure.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: October 13, 2015
    Assignee: Team Worldwide Corporation
    Inventors: Cheng-Chung Wang, Chien-Hua Wang
  • Patent number: 9151304
    Abstract: A cushion arrangement for smoothing stage changes in an hydraulic cylinder and including at least one compression chamber of variable volume with a movable and/or deformable chamber wall element displaceable by at least one of the pistons when approaching the transition zone between first and second stages of displacement. The compression chamber is operatively connected to a gas volume to be compressed upon displacement of the chamber wall element.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: October 6, 2015
    Assignee: Liebherr-Mining Equipment Company
    Inventors: Bryan Michael Harper, James Arthur Whitfield, Jr.
  • Patent number: 9145164
    Abstract: The present invention relates to a compact and light weight integral hydraulic power assisted steering gear arrangement comprising housing; a cylinder in the housing having pressure chambers; an axially bored rack piston slidably carried in the cylinder; an output shaft journaled on the housing for rotating about an axis with a sector gear; a worm extending in axial alignment into the bore of rack piston; an operating steering shaft journaled for rotation on the housing; a control valve positioned in valve chamber of the housing; and one or more covers fixed on to the housing through one or more locker wires for sealing the hydraulic fluid, supporting worm and output shaft. The rack piston is two separate components. The rack with axially bored helical grooves and a series of rack teeth is supported by rack supporter assembly on one side and by the piston on the other end.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: September 29, 2015
    Inventors: Ramanathan Thirupathi, Velayuthapandian Suresh Kantha Kumar, Sivaperumal Prakasam
  • Patent number: 9010234
    Abstract: A hydraulic cylinder includes a cylinder assembly having a cylinder, defining an inner hydraulic chamber and being for reciprocating receipt of a piston and piston rod therein; a piston rod extending from the inner hydraulic chamber exteriorly of the cylinder; and a piston head assembly connected with the piston rod and disposed for reciprocation within the cylinder assembly. The piston head assembly includes a piston head and a valve assembly including a passageway defined in the piston head and a valve member having an outer surface and being sized and configured for reciprocation in the passageway between extended and retracted positions therein, the valve member defining at least one flat defined along the outer surface and at least one transition surface between the outer surface and the flat, the transition surface forming an angle with the flat of between about 40 and 50 degrees.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: April 21, 2015
    Inventor: Tim Foster
  • Patent number: 8820818
    Abstract: A vehicle comprises a chassis and a tilt cab which is mounted to said chassis and is tiltable with respect to the chassis. The vehicle furthermore comprises a tilting system for tilting said tilt cab relative to the chassis between a lowered position and a raised position. The tilting system comprises a reservoir for hydraulic fluid, a pump and at least one double-acting hydraulic tilt cylinder having a push chamber and a pull chamber. The cylinder has a movable piston and piston rod assembly, wherein the piston separates the push chamber and the pull chamber. The cylinder is connected to the chassis and to the cab, such that when hydraulic fluid is supplied to the push chamber the cab moves to the raised position and when hydraulic fluid is supplied to the pull chamber the cab moves to the lowered position.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: September 2, 2014
    Assignee: Actuant Corporation
    Inventor: Jan Albertus Beumer
  • 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: 8683910
    Abstract: A hydraulic cylinder includes a cylinder assembly having a cylinder, defining an inner hydraulic chamber and being for reciprocating receipt of a piston and piston rod therein; a piston rod extending from the inner hydraulic chamber exteriorly of the cylinder; and a piston head assembly connected with the piston rod and disposed for reciprocation within the cylinder assembly. The piston head assembly includes a piston head and a valve assembly including a passageway defined in the piston head and a valve member having an outer surface and being sized and configured for reciprocation in the passageway between extended and retracted positions therein, the valve member defining at least one flat defined along the outer surface and at least one transition surface between the outer surface and the flat, the transition surface forming an angle with the flat of less than 90 degrees.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: April 1, 2014
    Assignee: Foster Hydraulics, Inc.
    Inventor: Tim Foster
  • Patent number: 8550794
    Abstract: A double acting dual stroke fluid pump with pressure assists is disclosed. First and second pistons are mounted to a common shaft which reciprocates within first and second cavities during compression and suction strokes. The second piston may have a one way valve which opens and closes during the compression and suction strokes to enable the fluid pump to force fluid out of the outlet during both the compression and suction strokes.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: October 8, 2013
    Assignee: Foothill Land, LLC
    Inventor: Benjamin R. Du
  • Publication number: 20130061741
    Abstract: A dual-mode fluid powered actuator includes a cylinder housing having a cylinder axis, a first end and a second end spaced axially apart from the first end, and an inner surface extending between the first and second ends. A first fluid port is provided adjacent the first end of the cylinder housing and a second fluid port is provided adjacent the second end of the cylinder housing. A piston assembly is in the cylinder housing, the piston assembly slidable between the first and second ports. The piston assembly includes a first piston member and a second piston member, the first and second piston members translatable relative to each other between an engaged position in which the piston assembly isolates the first fluid port from the second fluid port, and a disengaged position in which the first and second fluid ports are in fluid communication with each other through the piston assembly.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 14, 2013
    Inventors: Carsten Link, Robert Belair
  • Patent number: 8360097
    Abstract: Embodiments of a valve actuator are provided for adjusting the position of a main valve element in relation to the pressure of a fluid supplied by a supply duct. The valve actuator includes a housing, a control pressure valve disposed in the housing, and a piston slidably disposed in the housing and mechanically coupled to the main valve element. The housing has a control pressure chamber therein, which is configured to be fluidly coupled to the supply duct. The control pressure valve is configured to substantially impede fluid flow into the control pressure chamber until the fluid pressure within the supply duct surpasses a minimum actuation pressure. The piston normally resides in a first position and is configured to move toward a second position as the pressure within the control pressure chamber increases.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: January 29, 2013
    Assignee: Honeywell International Inc.
    Inventors: Justin A. Tanner, Larry Blessing, Doug Kortum, Benjamin Tang
  • Publication number: 20120216671
    Abstract: A piston pump includes a main body having an inlet, an outlet, and a chamber fluidly connected to form at least a portion of a first fluid flow path for receiving a flow of fluid therein. The pump also includes a second fluid flow path to provide fluid communication between the chamber and a point upstream of the inlet of the main body. A piston is disposed in the chamber of the main body and reciprocatingly moves therein to cause the flow of the fluid through at least one of the first fluid flow path and the second fluid flow path. An adjustment element is disposed in the main body and configured to adjust an effective flow of the fluid through the first fluid flow path.
    Type: Application
    Filed: February 27, 2012
    Publication date: August 30, 2012
    Inventor: James H. Gammon
  • Publication number: 20120144922
    Abstract: A piston chamber combination comprising a container type piston, communicating with an enclosed space, said enclosed space having an at least substantially constant volume.
    Type: Application
    Filed: December 30, 2009
    Publication date: June 14, 2012
    Inventor: Nicolaas van der Blom
  • Patent number: 8166915
    Abstract: A device for removing at least one teat cup (1a) from a teat of an animal includes i) a cylinder (2) provided with a movable piston (3) dividing an inner space of the cylinder in a first compartment (4) and a second compartment (5), ii) a valve mechanism (9) adapted to connect a vacuum source (8) to the first compartment (4) when it is in a first position and to break this connection when it is in a second position, iii) a passage (15) leading into the first chamber (4), and iv) a valve member (16) adapted to allow a flow through the passage (15) to the first compartment (4) during occasions when an operator moves the teat cup (1a) from a storing position to a teat attaching position.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: May 1, 2012
    Assignee: DeLaval Holding AB
    Inventor: Mike Lingard
  • Patent number: 8152477
    Abstract: One embodiment of the present invention provides a piston assembly having a piston housing filled with an electrolyte; a housing within the piston housing that divides the piston housing into a first portion and a second portion, the housing having apertures, a shaft connecting the housing to a piston head outside of the piston housing; and a porous material inside of the housing in contact with the electrolyte. Additionally, there are provided a method for filling the delivery chamber with a delivery fluid by withdrawing the piston head from within the delivery chamber. Yet another embodiment provides a method for filling a fluid delivery assembly by withdrawing a shaft from within the fluid delivery assembly to simultaneously displace a moving pump element within the delivery chamber and bypass fluid around a housing in the pump chamber.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: April 10, 2012
    Assignee: Eksigent Technologies, LLC
    Inventors: Deon Stafford Anex, Charles Martin Schwimmer, David Laurence Black, Richard Dean Rush, Michael James Gearhart
  • Publication number: 20100300280
    Abstract: A hydraulic pressure multiplier having a housing, a bore in the housing and an outer piston slidably positioned within the bore. The pressure multiplier also includes an inner piston having a bore therethrough, the inner piston being positioned within a bore within the outer piston. An opening is provided through an end wall of the outer piston, and a mechanism is provided to selectively control hydraulic fluid flow into the bore within the outer piston. Hydraulic fluid first flows through the opening in the outer piston and through the bore through the inner piston to actuate a slave cylinder or a hydraulic piston within a brake. After a threshold pressure is reached within the slave cylinder, the valve closes and the outer piston is caused to move axially, thereby providing an increased hydraulic pressure within the slave cylinder.
    Type: Application
    Filed: May 14, 2010
    Publication date: December 2, 2010
    Inventor: Edward L. Chandler
  • Patent number: 7827903
    Abstract: A seal valve arrangement is provided for a hydraulic device (10). The hydraulic device has an inner bore (14). The seal valve arrangement includes an element (45) disposed in the bore. The element is constructed and arranged to define a fluid passage (47) so fluid can move from one side thereof to a side opposite the one side. An elastomer seal member (39) is adjacent to the fluid passage and to a seal portion (r) of the element. A spring member (41) biases the seal member to engage the portion (r) to maintain sealing of the fluid passage under certain fluid pressure conditions, and under different fluid pressure conditions, permits the seal member disengage from the portion of the element to open the fluid passage. A tipping point is disclosed as a point when a fluid pressure condition alone causes the seal member (39) to fully engage the portion of the element and fully seal the fluid passage.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: November 9, 2010
    Assignee: LatchTool Group LLC
    Inventor: Myron D. Tupper
  • Patent number: 7784392
    Abstract: The present invention is a hydraulic locking cylinder assembly comprising a bi-directional control relief valve integrated with a piston. More particularly, the present invention is a bi-directional control relief valve for a hydraulic cylinder, fully integrated with a piston, and having a single poppet valve that performs the function of both a direction control valve and a relief valve.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: August 31, 2010
    Assignee: HDM Hydraulics, LLC
    Inventor: Charles J. Manney, III
  • Publication number: 20100175492
    Abstract: A servo-assistance mechanism (10) comprises an element (20) upon which a manual shifting force to be assisted acts. The servo-assistance mechanism (10) further comprises at least one valve piston (40, 48), arranged on the element (20), and at least one device (58, 60), for limiting the servo-assistance force. The valve piston (40, 48) comprises a first valve piston (42, 50) and a second valve piston (44, 52), and the first valve piston (42, 50) co-operates with the device (58, 60) for limiting the servo-assistance force and is arranged and radially sealed inside the second valve piston (44, 52).
    Type: Application
    Filed: May 27, 2008
    Publication date: July 15, 2010
    Inventors: Klaus Spaeth, Dieter Fischer
  • Publication number: 20100119394
    Abstract: The invention relates to a cylinder piston arrangement for an especially volumetric fluid pump or a fluid motor, preferably comprising at least one axial expansion tubular membrane piston defining at least one inner pulsating working chamber. A particular field of application for such pumps or motors is the operation thereof with fluids loaded with extraneous materials, especially abrasive granulated materials. Especially high-speed machines with high working pressures of between a few hundred to a thousand bar are required, the energetic and also volumetric degree of efficiency thus becoming highly important factors. The aim of the invention is therefore to create pumps or fluid motors which are characterised by high degrees of efficiency and long service lives. To this end, at least one clearance driving body (TK1) is actively connected to the pulsating working chamber (AR).
    Type: Application
    Filed: July 11, 2007
    Publication date: May 13, 2010
    Inventor: Bernhard Frey
  • Publication number: 20100116125
    Abstract: A power steering device for a vehicle which is disposed in the transmission path between a steering handle and a steerable vehicle wheel, comprises a servo cylinder having two pressure chambers, which are separated by a working piston and are each connected to a pressure supply unit. A valve plunger, which seals a bypass channel between the pressure chambers, is movably disposed on the working piston. Furthermore, an adjustment bushing comprising an adjustment section is disposed in the servo cylinder, the valve plunger being moved against this section upon approaching an axial limit position, thereby opening the bypass channel. The adjustment bushing is clamped into the servo cylinder, yet held displaceably, wherein, on the adjustment bushing, a sealing section is provided, which is to be moved into a sealing position with the working piston so as to interrupt the flow connection between the pressure chambers.
    Type: Application
    Filed: October 27, 2009
    Publication date: May 13, 2010
    Applicant: ZF Lenksysteme GmbH
    Inventors: Joachim Linde, Michael Haegele
  • Publication number: 20100107864
    Abstract: A double-rod electrohydraulic actuator for the purpose of causing push-pull motion while being part of a structure. Actuator comprises of a piston assembly and an external cylinder. Piston assembly comprises of a piston housing and flanged piston rods on both ends. Piston housing comprises of a cylindrical housing with external sliding seals in sealing contact with the interior surface of the external cylinder. Cylindrical housing contains: pump, motor, relief valves, seals, and porting required for control of fluid flow through the assembly. External cylinder will have sliding seals at both ends in sealing contact with the flanged piston rods of the piston assembly, and hydraulic fluid filling all internal voids. The flanged piston rods will have porting in the flanges for fluid flow and hollow centers for wiring conduit to and through actuator. Relief valves will bypass fluid around the pump section in overload conditions to protect the actuator.
    Type: Application
    Filed: October 16, 2009
    Publication date: May 6, 2010
    Inventor: James Allen Bushner
  • Patent number: 7644646
    Abstract: A three position servo system. The servo system has a servo housing that has first and second control ports disposed therein in a cavity in fluid communication with the first and second control ports. A servo piston having at least one pressure chamber disposed therein is then used to communicate the pressure within the first and second ports into the first end of the cavity. Thus, when pressure is applied below a threshold pressure to both ports a first position is achieved, when pressure is applied above the threshold pressure in only one port a second position is achieved, and when pressure is applied above the threshold pressure in both ports a third position is achieved. Therefore, the servo system provides three different operating positions.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: January 12, 2010
    Assignee: Sauer-Danfoss, Inc.
    Inventor: Mark A. Peterson
  • Publication number: 20090267311
    Abstract: There is provided with a cylinder apparatus comprising: a cylinder; a piston; a piston rod, one end of which is connected to the piston and the other end of which is extended outside; an external cylinder provided at an outer periphery of the cylinder so as to form a reservoir in which to seal the hydraulic liquid and gas therebetween; a base valve dividing the second chamber and the reservoir; a first check valve provided with the piston so as to allow flow of the hydraulic liquid only from the second chamber side to the first chamber side; a second check valve provided with the base valve so as to allow flow of the hydraulic liquid only from the reservoir side to the second chamber side; a flow passage connecting the first chamber with the reservoir; and an opening and closing valve opening and closing the flow passage.
    Type: Application
    Filed: March 20, 2009
    Publication date: October 29, 2009
    Applicant: Hitachi, Ltd.
    Inventors: Takashi Ohnuma, Takao Nakadate
  • Patent number: 7325710
    Abstract: A pneumatic nail gun includes a gun body having a cylinder therein; a hitting piston disposed in the cylinder; a main air housing collecting high pressure air; a trigger at one end of the main air housing; a main passage disposed at a peripheral portion of the cylinder, the main passage being connecting with the main air housing for gathering high pressure air therein; and a bottom valve disposed at a bottom peripheral portion of the cylinder, the bottom valve being driven to upwardly move for continuously guiding high pressure air into the bottom chamber to drive the hitting piston upwardly move to reposit when the trigger is released. When the high pressure air in the main passage is recharged, the bottom valve is driven by the high pressure air gathered in the main passage to move downward to reposit after the hitting piston being reposited.
    Type: Grant
    Filed: November 25, 2006
    Date of Patent: February 5, 2008
    Assignee: De Poan Pneumatic Corp.
    Inventor: Wan-Fu Wen
  • Patent number: 7240603
    Abstract: A piston assembly for a door closer includes a piston formed with a mounting hole and a door closer valve installed with clearance in the mounting hole. The door closer valve has a body part with first and second formations at opposite respective ends of the body part for engaging opposite respective sides of the piston and retaining the valve in the mounting hole. The body part is movable in the mounting hole axially of the mounting hole. The first formation is a protruding flange for seating against the piston at the first side thereof around the mounting hole and creating a seal around the mounting hole.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: July 10, 2007
    Assignee: Abloy Oy
    Inventor: Harri Juntunen
  • Patent number: 7237471
    Abstract: A continuously lockable adjustment device for immobilizing elements which are movable relative to each other includes a stepped cylinder having a first cylinder step and a second cylinder step, the second cylinder step having a larger cross-sectional area than the first cylinder step, a stepped piston having a first piston step guided in the first cylinder step and a second piston step guided in the second cylinder step, and a piston rod connected to the piston opposite the first piston step and extending sealed off out an end of the cylinder. The cylinder has a first working space and a second working space separated by the piston and filled with a working fluid in which the piston can be displaced axially, thereby displacing working fluid from one working space to the other working space.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: July 3, 2007
    Assignee: Stabilus GmbH
    Inventors: Rolf Mintgen, Paul Muders, Wilhelm Schwab
  • Patent number: 7231865
    Abstract: A swiveling motor for a divided stabilizer in an area of a vehicle axle, in which a housing is closed off in a region of its end surfaces by lids. A differential pressure regulating valve located coaxially with the housing and having at least one electromagnet, and two springs of different spring load deflection characteristics directed opposite to one another. One of these springs has a lower spring load deflection characteristic in a region of the electromagnet.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: June 19, 2007
    Assignee: Thyssenkrupp Automotive AG
    Inventors: Holger Wehaus, Volker Middelmann
  • Patent number: 7143684
    Abstract: A hydraulic actuator comprises piston that divides the interior into a piston chamber and a rod chamber and a valve disc assembly to regulate flow of hydraulic fluid between the piston chamber and the rod chamber through a passage in the piston. The disc valve assembly includes a washer, a valve pack that includes at least one flexible disc valve, and a spacer arrangement spacing the valve pack apart from the washer. During operation, the valve pack flexes to open and close the passage. The spacer arrangement includes a first support point supporting the valve pack relative to the washer and at least one second support point spaced apart from the flexible portion of the disc valve pack. In the open position, the valve pack engages the second support point to reduce stress build-up at the first support point, thereby reducing work fatigue of the valve disc and extending the useful life of the hydraulic actuator.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: December 5, 2006
    Assignee: Delphi Technologies, Inc.
    Inventors: Stephen E. Dourson, Scott A. Stacey, Vincent G. Pichon
  • Patent number: 7137586
    Abstract: Methods and apparatus for spooling a flexible member onto a drum with a spooler assembly. In certain embodiments, a spooler assembly comprises a spooler arm operable to guide a flexible member onto a drum rotating about a drum axis. A first actuator moves the spooler arm in a first direction that is parallel to the drum axis. The first actuator operates in a first mode wherein the flexible member is allowed to free movement in the first direction and a second mode wherein the first actuator controls the movement of the flexible member in the first direction. The spooler assembly may also comprise a second actuator that moves the spooler arm in a second direction that is perpendicular to the drum axis.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: November 21, 2006
    Assignee: National-Oilwell, L.P.
    Inventor: Ronald Talen
  • Patent number: 7104180
    Abstract: A linear actuator system including a cylinder, a piston slidably received within the cylinder and defining a piston chamber and a rod chamber in the cylinder, wherein the piston includes a plurality of orifices therethrough that place the piston chamber and the rod chamber in fluid communication, and a sealing member movable between a closed position, wherein the sealing member restricts fluid flow through at least one of the plurality of orifices, and an open position, wherein the sealing member is less restrictive of fluid flow through the orifices. The plurality of orifices may include an always-open orifice that is not blocked by the sealing member when the sealing member is in the closed position.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: September 12, 2006
    Assignee: Delphi Technologies, Inc.
    Inventors: Andrew F. Hall, Mike W. Hilton, Jason A. McClelland, Vincent Guy Pichon, Scott Alan Stacey, Steven K. Raypole, Todd J. Brinkman
  • Patent number: 7104058
    Abstract: In a vehicle braking system, a backup piston pushes a master piston directly from behind when hydraulic pressure of a boosted hydraulic pressure chamber decreases. The backup piston has a piston body which is slidably fitted in a casing, and a pusher which is slidably fitted in the casing with a seal diameter smaller than seal diameters of the master piston and the piston body and which extends to the front end of the piston body, to push the master piston from behind. An annular input chamber communicated with a hydraulic power source is formed between the backup piston and the casing. When the pusher pushes the master piston forward, amount of volume increased in the boosted hydraulic pressure chamber is set to be substantially equal to amount of volume decreased in the input chamber. Thus, it is possible to avoid increase in the hydraulic pressure of the boosted hydraulic pressure chamber during forward movement of the backup piston, using a simple configuration with a reduced number of parts.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: September 12, 2006
    Assignees: Nissin Kogyo Co., Ltd., Honda Motor Co., Ltd.
    Inventors: Isao Matsuno, Kazuhiro Tagata, Yasushi Aoki, Kenji Suzuki
  • Patent number: 7080589
    Abstract: The invention relates to a hydraulic cylinder comprising a piston rod bearing at least one tool receiving element. Said hydraulic cylinder is characterized by an automatic disconnection device which is controlled in a hydraulic-mechanical manner, with a medium for the actuation of the hydraulic cylinder. Said medium which is used for building-up force, is also the medium which is used for the automatic disconnection device. Said hydraulic cylinder also comprises a first valve slider and a second valve slider which are used for disconnecting the displacement of a piston, which is connected to a piston rod according to a possible obstruction found in the path of the outward moving piston rod before a desired position by deviating the medium in the region of the piston.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: July 25, 2006
    Assignee: BTM Corporation
    Inventor: Ulrich Beule
  • Publication number: 20040237769
    Abstract: A master cylinder piston, more particularly for a motor vehicle, comprises a flap (22), biased towards a position in which it shuts off a pressure-fluid passage (24), by means of a return spring (28) resting on a cage (30), which includes retaining means (38, 40) under a permanent set for their accommodation in an annular groove (44) provided in the housing (20) of the flap, when the cage (30) bears axially on an inner shoulder (64) of the housing (20).
    Type: Application
    Filed: June 3, 2003
    Publication date: December 2, 2004
    Inventors: Henri Pagot, Jean-Claude Hennebelle, Vincenzo Manzo
  • 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: 6746220
    Abstract: A pressure fluid-delivery device comprising a cylinder, a piston and a reservoir for a fluid. A V-seal is mounted in an annulus between the cylinder and the piston. An axial movement of the piston forwards relative to the cylinder results in a delivery of a pressure fluid from the cylinder space. A first leg, in a similar fashion to a check valve, hereby springingly attempts to seal an outlet opening of a channel, which communicates with the reservoir. When the piston is moved backwards, this leg can open the outlet opening, admitting fluid into the cylinder space. The seal rests on a forwardly facing, radially outwardly extending surface of the piston. The seal's first leg projects slantingly radially inwards and is arranged to come into abutment against an axially extending portion of the piston. The seal's second leg projects slantingly radially outwards and constantly abuts sealingly against the cylinder surface.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: June 8, 2004
    Assignee: Kongsberg Automotive ASA
    Inventor: Daniel Norheim
  • Patent number: 6722866
    Abstract: A pump system for delivering cryogenic liquids is proposed that is suitable, for example, for refueling motor vehicles with H2. It consists of a container for receiving the cryogenic liquid, in which at least one pump is arranged that is designed as a reciprocating pump with connecting rod actuation and spring recover. Pump cylinder (10) of the reciprocating pump is divided by means of plunger (24, 37) into two chambers (a and b) that are arranged on the pressure side or the induction side. By exerting tensile forces on connecting rod (29), in the pressure stroke the cryogenic liquid that is located in the container is initially trapped in chamber (b). When connecting rod (29) is returned to its starting position by return spring (23), the liquid that is trapped in chamber (b) is then hurled without pressure into chamber (a). In the subsequent pressure stroke, the liquid is finally released via a gap (d) to a pressure housing and from there to the consumer by exerting tensile forces on connecting rod (29).
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: April 20, 2004
    Assignee: Linde AG
    Inventor: Helmut Dresler
  • Patent number: 6679160
    Abstract: An actuator is provided that includes an operating shaft positioned within a chamber for movement between a first position and a second position, and a longitudinal bore for delivering air to an air chuck. A piston is disposed around the operating shaft and is reciprocally mounted in the chamber. When pressurized air is applied to the first side of the chamber, the piston is shifted against a second stop surface at the second side of the chamber allowing pressurized air to flow through the bores in the operating shaft to the air chuck. When pressurized air is applied to the second side of the chamber, the piston moves away from the second stop surface to move the piston to the first position from the second position, while air within the operating shaft is depressurized allowing the air chuck to decouple the operating shaft and chuck from the object being rotated.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: January 20, 2004
    Assignee: Eaton Corporation
    Inventors: Thomas E. Wise, Ray D. Warren
  • Patent number: 6666663
    Abstract: A gas suction apparatus for a reciprocating compressor, including a piston having a gas flowing passage where refrigerant gas flows, being inserted in the compression space formed in a cylinder enabling linear reciprocating movement, a fixing means combined to the piston and an inertia valve inserted in the gas flowing passage of the piston movably having a moving distance restricted by the fixing means, for opening and closing the gas flowing passage moving according to the pressure difference and inertia generated by the linear reciprocating movement of the piston can minimize dead volume of a gas compression space, ease controlling of a stroke and make the suction flowing of gas smoothly by an excellent reliability of response of valve, thus to improve compression performance. The damage of the component can be also prevented by increasing structural strength, thus to improve reliability.
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: December 23, 2003
    Assignee: LG Electronics Inc.
    Inventors: Hyeong Kook Lee, Hyung Jin Kim, Won Sik Oh, Hyuk Lee
  • Patent number: 6487955
    Abstract: A tilt apparatus for a marine propulsion device structure having a piston constituting a cylinder apparatus with a shock blow valve and a return valve, the return valve attaching a valve body to a return hole provided in the piston, and a valve body holding device provided in the return hole.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: December 3, 2002
    Assignee: Showa Corporation
    Inventor: Manabu Nishi
  • Patent number: 6463841
    Abstract: To facilitate assembling work of a check valve to improve workability at the time of assembling a lift cylinder. In a lift cylinder, a check valve 4 disposed in a shaft center part of a piston 2 has a valve seat member 41, a poppet valve, a bias spring 43 and a spring receiver 44, whereas a cushion ring 21 movably held on the piston 2 is placed in contact with an open end of the valve seat member 41 to thereby prevent it from slipping out of a predetermined position.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: October 15, 2002
    Assignee: Kayaba Kogyo Kabushiki Kaisha
    Inventors: Susumu Niwa, Kouiti Kanematsu
  • Publication number: 20020117049
    Abstract: A pneumatic motor includes a cylinder and a piston movably received in the cylinder. The cylinder includes a first end cover and a second end cover respectively attached to the opposite ends of the cylinder. An inlet port is defined in the first end cover and an outlet port is defined in the second end cover. The piston divides the cylinder into two chambers. An exhaust passage is defined in the piston and communicates with the two chambers. A cavity is defined in the first end cover to receive a shock absorber, and a path is defined to communicate with the cavity and the inlet port in the first end cover. The shock absorber mounted in the cavity in the first end cover cushions the striking force when the piston strikes the first end cover.
    Type: Application
    Filed: February 26, 2001
    Publication date: August 29, 2002
    Inventor: Ta-Chin Wang
  • Patent number: 6434931
    Abstract: A hydraulic brake master cylinder assembly includes a central or center port compensation valve mounted in respective brake actuator pistons and having a variable length stem which may be adjusted to predetermine the amount of valve travel between open and closed positions in response to actuation of the brake cylinder piston or pistons. The variable length stem includes a hub and a sleeve which is force fit over the hub and may be moved to set the length of the stem. The amount of gap or open position of the valve in the primary piston may be determined by installing the primary piston in the master cylinder, holding the piston in a fixed position and installing a seal retainer and washer for engaging the primary piston pin to move the pin to set the length of the valve stem.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: August 20, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: Schuyler S. Shaw, Elaine A. Ruble
  • Publication number: 20020040637
    Abstract: To facilitate assembling work of a check valve to improve workability at the time of assembling a lift cylinder.
    Type: Application
    Filed: July 3, 2001
    Publication date: April 11, 2002
    Inventors: Susumu Niwa, Kouiti Kanematsu