Both Valves Spring Biased Patents (Class 137/493.6)
  • Patent number: 10323769
    Abstract: A pressure relief valve (10) is provided for controlling fluid flow between a first fluid path (12a) and a second fluid path (12b). The pressure relief valve includes a housing (14), a diaphragm member (24) movably affixed within the housing and having a fluid port (18), a first biasing member (20) for urging the diaphragm member in a first direction, and a sealing member (26) movably mounted in the housing and configured for reversibly sealing the fluid port (18). When a pressure at the second fluid path (12b) exceeds a first predetermined threshold the diaphragm member (24) is pushed against the first biasing member (20), and the sealing member (26) is initially urged towards the fluid port (18) and subsequently becomes disengaged with the fluid port, allowing fluid communication between the second fluid path (12b) and the first fluid path (12a) via the fluid port.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: June 18, 2019
    Assignee: RAVAL A.C.S. LTD.
    Inventor: Omer Vulkan
  • Patent number: 9570765
    Abstract: A hydrogen supply unit is configured to inject hydrogen gas having flowed in an inflow passage into an outflow passage by use of an injector to reduce the pressure of the hydrogen gas. The hydrogen supply unit includes a primary-side relief valve for releasing the hydrogen gas from inside to outside of the inflow passage when the internal pressure of the inflow passage rises to a first predetermined value, and a secondary-side relief valve for releasing the hydrogen gas from inside to outside of the outflow passage when the internal pressure of the outflow passage rises to a second predetermined value. The primary-side relief valve and the secondary-side relief valve are held between the inflow block and the outflow block.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: February 14, 2017
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu Nagata
  • Patent number: 9150099
    Abstract: In a relief valve device, a positive-pressure relief valve opens a first valve port when pressure in a pressure chamber increases to a pressure that is equal to or higher than positive-pressure side valve-opening pressure. A negative-pressure relief valve opens a second valve port when pressure in the pressure chamber decreases to a pressure that is equal to or lower than negative-pressure side valve-opening pressure. When the positive-pressure relief valve is closed, a positive valve-opening pressure adjustment unit adjusts a set load of a positive-pressure spring according to an amount of an adjustment screw screwed in the pedestal plate. When the negative-pressure relief valve is closed, a negative valve-opening pressure adjustment unit adjusts a set load of the negative-pressure spring via the valve plate through forward or backward movement of the pedestal plate relative to a housing main body.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: October 6, 2015
    Assignee: DENSO CORPORATION
    Inventors: Ryoyu Kishi, Shinji Sugihara
  • Publication number: 20140216573
    Abstract: A check valve includes a casing including a positive pressure valve seat, a positive pressure valve urged by a positive pressure valve spring and including a negative pressure valve seat, and a negative pressure valve assembled to the positive pressure valve and urged by a negative pressure valve spring, where the positive pressure valve includes an inner cylinder, an outer cylinder that is connected with an outer circumference of the inner cylinder via ribs, and passages formed between the inner cylinder and the outer cylinder, where the positive pressure valve spring is disposed the casing and the outer cylinder, and where the negative pressure valve spring is disposed in the inner cylinder.
    Type: Application
    Filed: March 30, 2012
    Publication date: August 7, 2014
    Inventor: Kosei Yamaguchi
  • Patent number: 8789557
    Abstract: A ventilation arrangement for the head space of the fuel tank of a vehicle consists of a valve assembly received in a housing (30), which assembly is arranged to produce a maximum pressure, which is not to be exceeded, a minimum pressure below which the pressure must not fall, and a random pressure, for example, for the tank filling process, within the head space. For this purpose a valve which is biased by a spring (25) in the direction towards an atmospheric connector (6) and is characterised by a sealing plate (17), and a valve biased by a spring (19) in the direction towards a connector (5) intended for connection to the head space, and a valve characterised by a sealing head (24) are provided, the latter of which is simultaneously connected to an electromagnetic drive in order to produce the random pressure.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: July 29, 2014
    Assignee: A. Kayser Automotive Systems GmbH
    Inventors: Gerhard Müller-Riederer, Bernd Kipp
  • Patent number: 8657590
    Abstract: A hydraulic power steering system which includes a tank and a power steering pump which takes in a pressure medium from an intake area which is decoupled from the prevailing atmospheric pressure on the side of the tank wall and delivers it under pressure to the power steering system. A valve device builds up a pre-pressure in the intake area and prevents a negative pressure and a positive pressure from building up on the interior of the oil tank.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: February 25, 2014
    Assignee: ixetic Bad Homburg GmbH
    Inventor: Willi Parsch
  • Patent number: 8561637
    Abstract: A valve includes a housing configured to interengage with a container, a first and second poppets axially movable between open and closed positions, a first seal between the first poppet and the housing, a second seal between the first poppet and the second poppet, and first and second resilient members disposed within the housing and urging the first and second poppets toward the closed position.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: October 22, 2013
    Assignee: Girard Equipment, Inc.
    Inventors: Joseph Petrarca, Chris Lynch, Tim Girard, Michael Fernandez
  • Patent number: 8561638
    Abstract: A check valve includes a main-casing, a sub-casing, a positive-pressure valve and a negative-pressure valve. The positive-pressure valve has through holes and a negative-pressure valve seat. The negative-pressure valve has leg portions. A cap is disposed within the positive-pressure valve. A positive-pressure spring is disposed between the positive-pressure valve and the sub-casing, and a negative-pressure spring is disposed between the positive-pressure valve and the cap. A positive-pressure flow path for releasing fuel vapor is formed between an outer circumference of the positive-pressure valve and an inner circumference of the main-casing, at further outward position than the positive-pressure spring. A negative-pressure flow path for introducing outside air is formed between an inner circumference of the positive-pressure valve and the leg portions and an outer circumference of the cap and between the through holes and the leg portions, at further outward position than the negative-pressure spring.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: October 22, 2013
    Assignee: Piolax Inc.
    Inventor: Kosei Yamaguchi
  • Patent number: 8469051
    Abstract: A valve for limiting the tank pressure in a motor vehicle, comprising a first line (1) and a second line (2) which may establish a flow connection in which at least one body (3, 4) may be moved relative to another body (4, 3), whereby the movable body (3, 4) lifts up from a sealing seat (5), with regard to the object of adjusting the tank pressure using a compact design is characterized in that a first body (3), a second body (4), and the sealing seat (5) as a whole form a movable unit (6).
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: June 25, 2013
    Assignee: Eagle Actuator Components GmbH & Co.
    Inventors: Jörg Bittner, Stefan Hettinger
  • Patent number: 8459286
    Abstract: A pressure retention valve with integrated valve is disclosed. The pressure retention valve with integrated valve includes a housing; an outer piston positioned in the housing; a main seal between the outer piston and the housing; an inner piston positioned in the outer piston, the inner piston having a bore containing a valve; a spring between the housing and a top of the outer piston; an ambient bore in the housing above the main seal; an outlet in the housing below the main seal; and a vessel connection in the housing adjacent to the bore of the inner piston. Methods of supplying fuel to a gas consuming system using the pressure retention valve are also described.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: June 11, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Jurgen Thyroff, Oliver Maier
  • Patent number: 8302621
    Abstract: A pressure limiting valve comprises a valve closing body (7) which comprises a valve closing surface (8) which together with a first valve seat (9) opposing the valve closing surface (8) forms a first seal seat and a valve closing body orifice (11), which is surrounded by a second valve seat (12) which together with a closing head (14) configured on an axially displaceable valve bolt (13) forms a second seal seat and with a spring plate (15) which is connected to the valve bolt (13) and axially displaceable therewith, and a first return spring (10) clamped between the spring plate (15) and the valve closing body (7), which pretensions the valve bolt (13) against the second valve seat (12) configured on the valve closing body (7) and a second return spring (35) which pretensions a valve unit (7, 13, 15, 10) against the first valve seat (9). In the valve bolt (13) a longitudinal bore (53) is provided extending over the entire axial length of the valve bolt (13).
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: November 6, 2012
    Assignee: Brueninghaus Hydromatik GmbH
    Inventors: Reinhold Schniederjan, Markus Gepraegs
  • Patent number: 8171953
    Abstract: Particular embodiments of the present invention include devices and methods for relieving excess pressure or vacuum pressure from a tank interior. An embodiment of a pressure relief device includes a housing having an opening associated with a first end, an opening associated with a second end, and an over-pressure opening. The device further including a pressure relief valve for selectively relieving pressure from a tank, the valve including an over-pressure opening seal biased by a first pressure bias means against a pressure valve seat associated with the over-pressure opening. The device also including a guide block translatable in an axial direction of a second bore of the housing and being biased toward the pressure valve seat by a second pressure bias means. The guide block is translatable independent of the over-pressure opening seal. The device also includes a vacuum relief valve for selectively relieving vacuum pressure in the tank.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: May 8, 2012
    Assignee: Betts Industries, Inc.
    Inventors: David J. Adams, Patrick J. Lund, Craig E. Culbertson
  • Patent number: 8127910
    Abstract: A frictional engagement assembly for an automotive device, including: at least one frictionally engageable plate; a first piston plate displaceable in a first axial direction to urge the at least one frictionally engageable plate into frictional contact; a first resilient element engaged with the first piston plate and urging the first piston plate in a second axial direction substantially opposite the first axial direction; a check valve controlling fluid flow to displace the first piston plate; and an accumulator. As fluid from a chamber, at least partially formed by the first piston plate, discharges through the check valve, the accumulator controls fluid volume in the chamber to maintain a distal portion of the first piston plate, urging the at least one frictionally engageable plate into frictional contact, in a furthest position in the first axial direction.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: March 6, 2012
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Jeffrey Hemphill, Philip George, Ross A. Gresley
  • Patent number: 8066030
    Abstract: Disclosed is a fuel conveying device including a valve housing in which a pressure release valve and a non-return valve are arranged parallel to one another, the pressure release valve having a first inlet, which downstream of a valve seat opens into a valve chamber in which a valve body is movably arranged and which is in fluid connection with a second inlet for the non-return valve via a first outlet. The device improves the control response of the pressure release valve by providing the first outlet at the periphery of the valve chamber and in the axial direction with respect to a valve axis such that when the pressure release valve is open the flow from the valve chamber into the second inlet is a substantially radial flow.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: November 29, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Peter Schelhas, Andreas Herforth, Zdenek Liner, Michael Dufek, David Krenovsky
  • Patent number: 7874820
    Abstract: A compressor apparatus (20) has a housing (22) having first (53) and second (58) ports along a flow path. One or more working elements (26; 28) cooperate with the housing (22) to define a compression path between suction (60) and discharge (62) locations along the flow path. An unloading valve (100) has a valve element (102) having a range between a first condition and a second condition, the second condition being unloaded relative to the first condition. Means (120, 160) bias the valve element toward a third condition intermediate the first and second conditions.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: January 25, 2011
    Assignee: Carrier Corporation
    Inventor: Stephen L. Shoulders
  • Patent number: 7665579
    Abstract: A flow control valve includes a pressure compensating valve and a first switching valve. The pressure compensating valve is configured to enlarge an opening area of a variable orifice between a load pressure line and a compensating pressure line when a pressure of working fluid of the compensating pressure line is smaller than a first set pressure, and narrow the opening area of the variable orifice when the pressure of the working fluid of the compensating pressure line is larger than the first set pressure. The first switching valve is configured to switch between a meter-out operation and a neutral operation by an external operation, wherein the working fluid of the compensating pressure line is drained in the meter-out operation, the working fluid of the compensating pressure line is not drained in the neutral operation. The load pressure line guides the working fluid to be supplied to an actuator.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: February 23, 2010
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Masakazu Itose
  • Patent number: 7624752
    Abstract: An inflation valve includes a hollow sleeve having a first chamber and a second chamber; a first valve body located in the first chamber; a second valve body located in the second chamber; an air inlet connector screwed to an upper end of the second chamber; and a central pin assembly mounted in the air inlet connector. When an object being inflated by the inflation valve is excessively inflated, the inflation valve automatically releases surplus high-pressure air via at least one release pod of the second chamber by pushing the first valve body and the second valve body upward.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: December 1, 2009
    Inventor: Tien-Tsai Huang
  • Patent number: 7597153
    Abstract: An automotive vehicle includes a vehicle body and at least one reservoir containing a fire suppressant agent. A distribution system receives the fire suppression agent from the reservoir and conducts the agent to at least one location about the vehicle's body in response to the determination by a sensor system and controller that the vehicle has been subjected to a significant impact. The reservoir includes a multifunction valve element which controls pressure and vacuum within the reservoir during standby operation, while causing the fire suppressant agent to be directed through the distribution system if the propellant activates.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: October 6, 2009
    Assignee: Ford Global Technologies, LLC
    Inventor: Robert H. Thompson
  • Patent number: 7568497
    Abstract: A valve for use in regulating the flow of fluid between a first and a second fluid side is provided. The valve comprises a valve body and an aperture extending through the valve body. The aperture comprises an inner wall, a first aperture diameter at the first end of the aperture and a second aperture diameter at the second end of the aperture. The valve further comprises a first valve insert positioned in the aperture with a first insert diameter and a first mating feature. The first insert diameter is larger than the first aperture diameter. The valve further comprises a second valve insert having a first width, a second width and a second mating feature. The first width is larger than the second aperture diameter. The first mating feature cooperates with the second mating feature to engage the first valve insert to the second valve insert.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: August 4, 2009
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Thomas J. Langenfeld, Matthew C. Roney, Robert E. Trimble
  • Patent number: 7481320
    Abstract: One advantageous embodiment of the invention is a filter device (10) for filtering a fluid and providing three or more substantially continuous directions of flow therethrough. The filter device (10) includes a housing (12) having an entry port (18) and an exit port (20). The housing (12) has a filter medium (22) disposed therein for filtering the fluid that flows along a filtration-flow direction (24a) from the entry port (18) to the exit port (20). The filter medium (22) has a bi-directional valve (28) coupled thereto for selectively directing the fluid along a bypass-flow direction (24b) and a reverse-flow direction (24c) that is generally opposite to said bypass-flow direction (24b). The bypass-flow direction (24b) extends from the entry port (18) to the exit port (20) in bypass of the filter medium (22). Also, the reverse-flow direction (24c) extends from the exit port (20) to the entry port (18).
    Type: Grant
    Filed: January 5, 2005
    Date of Patent: January 27, 2009
    Assignee: NTZ Nederland BV
    Inventors: Kirk J. Ciak, Wilhelmus Petrus Maria Schaerlaeckens
  • Patent number: 7451780
    Abstract: A valve apparatus is disclosed for use in regulating the flow of fluid between a closed hydraulic loop and a fluid source in a hydraulic circuit, where the valve apparatus provides up to four different functions including a check valve, a neutral valve, a relief valve and a pressure rise rate valve. The apparatus includes a valve seat for selectively permitting fluid communication between the closed hydraulic loop and the fluid source, a sleeve member and a relief poppet in the valve seat, a relief compression spring inside the sleeve and positioned adjacent the relief poppet and the base of the slidable member, a valve guide and an accumulator piston slidably mounted within the valve guide to define an accumulator volume therein.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: November 18, 2008
    Assignee: Hydro-Gear Limited Partnership
    Inventor: Robert E. Trimble
  • Patent number: 7392823
    Abstract: Improvement in a combination valve including check valve and pressure relief valve portions for regulating fluid flow pressure and direction in a hydraulic circuit, wherein a valve seat includes, in addition to a central aperture, a plurality of peripherally-spaced axial cross-port orifice holes, of same or differing diameter and a plurality of intersecting, circumferentially-spaced, radial, semicircular holes; a spring cap including four adjoining axial portions of differing outer diameters, with a first portion being a protrusion that locates an end of a relief valve compression spring, a second portion having flat outer tool locating surfaces used for rotating the spring cap for axial adjustment relative to a valve stem, a third portion having a reduced radial wall thickness for easy crimping thereof relative to a valve stem, and a fourth portion having a coaxial recess for centering and physically retaining one end portion of a check valve compression spring.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: July 1, 2008
    Assignee: Parker-Hannifin Corporation
    Inventors: Xingen Dong, Albert C. Ellenburg, Frank P. Holzschuh
  • Publication number: 20080135110
    Abstract: A bi-directional positive and negative pressure relief valve includes valve elements and flow passages that are configured to provide a fairly specific pressure distribution on the valve elements, and thus valve opening may be controlled in a more precise manner. The valve element and flow passage configuration results in a valve having a reduced size and weight, relatively higher rate and relatively smaller springs, and relatively smaller valve seat diameters. The bidirectional positive/negative pressure relief valve furthermore exhibits relatively high pressure and flow control accuracy, and exhibits good valve stability.
    Type: Application
    Filed: April 25, 2007
    Publication date: June 12, 2008
    Applicant: HONEYWELL INTERNATIONAL, INC.
    Inventors: John A. Vasquez, Paul W. Banta, Todd C. Garrod, Ed N. Dismukes, David J. Pantier
  • Patent number: 7367353
    Abstract: A combination check valve and pressure relief valve is provided for use in regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, a check poppet attached to the valve insert, and a check spring positioned between the valve insert and the valve body. In addition, a relief spring and a relief poppet may be positioned within a cavity formed by the valve insert and secured in position by the check poppet. The combination of the valve insert and the check poppet is adapted to move relative to the valve body and against the force of the check spring to permit fluid to pass from the first fluid side to the second fluid side, and the relief poppet is adapted to move relative to the check poppet against the force of the relief spring to allow fluid to pass from the second fluid side to the first fluid side.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: May 6, 2008
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Thomas J. Langenfeld, Matthew C. Roney, Robert E. Trimble
  • Patent number: 7331323
    Abstract: A lubricating oil supplying system for an internal combustion engine includes a lubricating oil storage section for storing lubricating oil. A driven pump is driven by the internal combustion engine to suck the lubricating oil from the lubricating oil storage section and discharge the lubricating oil to a discharge passage. An electric pump is provided for sucking the lubricating oil discharged from the driven pump to the discharge passage and discharge the lubricating oil to a lubricating oil requiring section in the internal combustion engine. A controlling mechanism is provided for drivingly controlling the electric pump in accordance with a control signal. A bypass passage is provided for bypassing the driven pump. A check valve is disposed in the bypass passage to allow the lubricating oil in the lubricating oil storage section to flow only through a path bypassing the driven pump and toward the discharge passage.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: February 19, 2008
    Assignee: Hitachi, Ltd.
    Inventor: Seinosuke Hara
  • Patent number: 7320334
    Abstract: A valve for use in regulating the flow of fluid between a first fluid side and a second fluid side of a hydraulic circuit. A bore is extended through a valve seat, and the bore and valve stem cooperate to form a fluid passage from the first side to the second side. A plurality of ribs are located on one side of the valve seat and extend in a direction generally parallel to the bore.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: January 22, 2008
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Robert E. Trimble, Tage Christiansen, Anders Kryhlmand, Thomas Kopel
  • Patent number: 7258134
    Abstract: A combination check valve and pressure rise rate valve is provided for regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, and a check poppet attached to the valve insert. In addition, the valve may include a cylinder positioned within the valve insert, a piston slidably positioned within the cylinder, a spring positioned between the cylinder and the valve insert, and an accumulator formed between the cylinder and the piston.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: August 21, 2007
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Thomas J. Langenfeld, Matthew C. Roney
  • Patent number: 7201183
    Abstract: A valve arrangement in a hydraulic circuit comprises a longitudinal duct 3 and a transverse duct 2. A throttle slide 10 can be displaced in the direction of the longitudinal duct 3. Arranged in the throttle slide 10 is a valve piston 25, by means of which the flow through the hollow throttle slide 10 can be enabled or blocked. The flow of hydraulic fluid takes place through two groups of passage holes 33a, 35a, which are arranged in the throttle slide 10. The interaction of pressure and flow direction of the hydraulic fluid, and also the restoring force of a slide spring 20 and a piston spring 30, achieves a situation where hydraulic fluid can flow through the valve arrangement in both directions but that a throttling action occurs only when the hydraulic fluid flows from the transfer duct 2 to the longitudinal duct 3 under increased pressure.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: April 10, 2007
    Assignee: Sauer-Danfoss, Inc.
    Inventor: Reinhardt Thoms
  • Patent number: 7140385
    Abstract: In the stationary part (1) of an axial piston machine, a first flow duct (2) and second flow duct (5) intersect with the central axes (3) and (6). A valve body (20) having a valve cone (21) and a tubular guide piston which can be displaced in relation to the valve cone is situated in the extension of the central axis (3) of the first flow duct (2). The valve body (21) bears against a first valve seat (4) which is surrounded by an expanded section (7). The entire valve body (20) moves in a tubular partial housing (9) which is connected to the stationary part (1) in a sealed manner via a seal (11), a screw connection (10) and a flange (12) which rests on a shoulder (13) of the stationary part (1). A first compression spring (27) and a second compression spring (28) serve to support the valve body (20) and its parts in relation to one another. An extension stem (22) passes through the tubular guide piston and guides the second compression spring (28).
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: November 28, 2006
    Assignee: Sauer-Danfoss Inc.
    Inventors: Reinhardt Thoms, Carsten Fiebing
  • Patent number: 7086388
    Abstract: A combination valve for fuel delivery system of a vehicle having an engine, the fuel delivery system being configured to pump fuel to the engine and the fuel delivery system has a regulator for regulating the pressure of the fuel when it is being pumped to the engine by the fuel delivery system, the combination valve comprising: an outer housing defining an inner opening for slidably receiving a body portion of a system pressure relief valve therein, the body portion of the system pressure relief valve defining an inner opening for slidably receiving a body portion of a check valve therein, the body portion of the check valve being configured to provide a first fluid pathway in a first direction when the body portion of the check valve moves from a closed position to an open position as the body portion of the check valve moves in the first direction within the inner opening of the body portion of the system pressure relief valve, the body portion of the system pressure relief valve being configured to provid
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: August 8, 2006
    Assignee: Delphi Technologies, Inc.
    Inventors: Robert A. Roth, Dennis P. McGrath
  • Patent number: 7066199
    Abstract: A valve assembly for use in regulating the flow of fluid between a first fluid side and a second fluid side of a hydraulic circuit. The valve includes a valve guide, a valve stem engaged to the valve guide and a valve seat. A bore is extended through the valve seat, and the bore and valve stem cooperate to form a fluid passage from the first side to the second side.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: June 27, 2006
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Robert E. Trimble, Tage Christiansen, Anders Kryhlmand, Thomas Kopel
  • Patent number: 7028708
    Abstract: A combination check valve and pressure relief valve is provided for use in regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, a check poppet attached to the valve insert, and a check spring positioned between the valve insert and the valve body. In addition, a relief spring and a relief poppet may be positioned within a cavity formed by the valve insert and secured in position by the check poppet. The combination of the valve insert and the check poppet is adapted to move relative to the valve body and against the force of the check spring to permit fluid to pass from the first fluid side to the second fluid side, and the relief poppet is adapted to move relative to the check poppet against the force of the relief spring to allow fluid to pass from the second fluid side to the first fluid side.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: April 18, 2006
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Thomas J. Langenfeld, Matthew C. Roney, Robert E. Trimble
  • Patent number: 7021326
    Abstract: A combination inflation and relief valve having an inflation gasket mounted on a reciprocating stem head that separates from a valve seat of a valve body against the force of an inflation spring upon inflation and having a relief gasket mounted on a reciprocating push disk that separates from the stem head against the force of a relief spring to allow excess internal pressure to vent through relief holes.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: April 4, 2006
    Assignee: Halkey-Roberts Corporation
    Inventor: Stephen J. Rogier
  • Patent number: 6986363
    Abstract: A valve assembly for use in regulating the flow of fluid between a first fluid side and a second fluid side of a hydraulic circuit. The assembly has an insert mounted in a hydraulic component having at least a portion of the hydraulic circuit formed therein, the insert also has a first end exposed to the first fluid side, a first end opening formed on the first end and a second end open to the second fluid side. The valve assembly additionally has a valve plug retained within the second end of the insert and a valve seat surface formed on the first end of the insert. The valve assembly also has a combination check valve and pressure relief valve located within the insert between the valve seat surface and the valve plug to selectively open and close the first opening.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: January 17, 2006
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Robert E. Trimble, Tage Christiansen, Anders Kryhlmand, Thomas Kopel
  • Patent number: 6929025
    Abstract: A two-way valve includes a valve case with the first valve seat formed at one of two openings, the first valve member movable in the valve case for abutting against the first valve seat, and the first urging device for urging the first valve member toward the first valve seat. The first valve member includes a communication path therein and the second valve seat formed at one end portion thereof. The second valve member for abutting against the second valve seat is disposed in the communication path to block the communication path, and the second urging device is provided for urging the second valve member toward the second valve seat.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: August 16, 2005
    Assignee: Nifco Inc.
    Inventor: Hiroji Sato
  • Patent number: 6910502
    Abstract: A decoupled check-relief valve for use in a hydraulic fluid circuit is provided that has a cylindrical guide housing which travels during the check function of the valve. The cylindrical guide housing has a clearance parameter, allowing for the selection of an optimal check response time. A dampening disk is provided inside the cylindrical guide housing, traveling within the guide during the relief function of the valve. The dampening disk has a separate clearance parameter, allowing for the selection of an optimal dampening capacity and fluid circuit stability. As such, the check and relief clearance parameters are independent of each other to allow both the check and relief functions of the valve to be optimized.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: June 28, 2005
    Assignee: Sauer-Danfoss, Inc.
    Inventor: Kevin J. Landhuis
  • Patent number: 6875343
    Abstract: A dual direction bypass valve allows a transmission filter to function whether or not it is placed in the vehicle transmission correctly. The filter includes a front and rear valve bodies separated by an end cap, and each having a spring and disk. When the filter media is clogged during normal forward flow, the fluid pressure on the rear valve body disk compresses the spring, opening an aperture in the end cap, allowing the fluid to pass from the front valve body through the rear valve body to the outlet, bypassing the filter media. If the transmission filter is placed in the engine backwards, the fluid pressure compresses the spring of the front valve body and opens up apertures in the end cap, such that the fluid flows through the apertures and the front valve body, bypassing the rear valve body and the filter media, to exit the filter.
    Type: Grant
    Filed: August 21, 2001
    Date of Patent: April 5, 2005
    Assignee: SPX Corporation
    Inventor: Larry A. Druga
  • Patent number: 6719005
    Abstract: A combination check valve and pressure relief valve is provided for use in regulating the flow of fluid between a first fluid side and a second fluid side. The combination check valve and pressure relief valve includes a valve plug, a valve guide moveably positioned in relation to the valve plug, a valve stem engaged to the valve guide, a check compression spring attached to the valve stem and positioned between the valve guide and the valve plug, a valve seat carried by the valve stem, and a relief compression spring positioned between the valve seat and the valve guide. The valve guide is adapted to move the valve stem relative to the valve seat against the force of the relief compression spring to allow fluid to pass from the first fluid side to the second fluid side through a fluid flow passage formed between the valve stem and the valve seat.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: April 13, 2004
    Assignee: Hydro-Gear, Limited Partnership
    Inventors: Robert E. Trimble, Tage Christiansen, Anders Kryhlmand
  • Patent number: 6619497
    Abstract: Apparatus for venting a container containing a fluid and including a poppet mounted to the bottom of a cap or flap mounted to a housing for being mounted to the container, a fastener for fastening the cap of flap to the housing and which fastener may be a fusible fastener for unfastening the cap or flap and for venting the container to the atmosphere upon heat applied externally to the container reaching a predetermined temperature. The poppet venting the container to the atmosphere upon the pressure in the container reaching a predetermined pressure and the poppet may be a combination poppet for venting the container to the atmosphere upon pressure in the container reaching a predetermined pressure and for venting the container to the atmosphere upon a vacuum in the container reaching a predetermined vacuum.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: September 16, 2003
    Assignee: Girard Equipment Co.
    Inventor: John L. Freiler
  • Publication number: 20030150492
    Abstract: A two-way valve includes a valve case with the first valve seat formed at one of two openings, the first valve member movable in the valve case for abutting against the first valve seat, and the first urging device for urging the first valve member toward the first valve seat. The first valve member includes a communication path therein and the second valve seat formed at one end portion thereof. The second valve member for abutting against the second valve seat is disposed in the communication path to block the communication path, and the second urging device is provided for urging the second valve member toward the second valve seat.
    Type: Application
    Filed: January 24, 2003
    Publication date: August 14, 2003
    Applicant: NIFCO INC.
    Inventor: Hiroji Sato
  • Publication number: 20020091302
    Abstract: A pump assembly for a penile implant is provided having a mechanism which prevents spontaneous inflation of the cylinders implanted within the user. The preventative mechanism uses overpressure generated by the reservoir during unintentional compression to effectively seal the pump assembly from unintended fluid flow. The prevention mechanism itself creates all necessary forces to prevent the undesired fluid flow to the cylinders. This is accomplished by incorporating appropriate mechanisms within the pump itself.
    Type: Application
    Filed: December 27, 2000
    Publication date: July 11, 2002
    Applicant: American Medical Systems, Inc.
    Inventors: Charles C. Kuyava, John W. Westrum, David W. Clark
  • Patent number: 6393962
    Abstract: In a power steering apparatus provided with a damper valve, the damper valve holds a partition member between a cap and the housing.
    Type: Grant
    Filed: September 26, 2000
    Date of Patent: May 28, 2002
    Assignee: Showa Corporation
    Inventors: Satoshi Hamano, Akihiko Serizawa, Hiroyuki Fujita, Satoshi Aiko
  • Patent number: 6357415
    Abstract: A fuel shut-off safety device is mounted in a fuel injection system for an internal combustion engine. The fuel shut-off safety device includes a cylindrical body having a fuel passage and a valve seat, a piston disposed to slide in the fuel passage, a valve body to shut off the fuel passage when it is seated on the valve seat, a center bore connected to the fuel inlet, and an aperture connecting the center bore and the fuel passage, and a compression coil spring for biasing the piston to unseat the valve body from the valve seat.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: March 19, 2002
    Assignee: Denso Corporation
    Inventor: Katsumi Mori
  • Patent number: RE41861
    Abstract: A decouple check-relief valve for use in a hydraulic fluid circuit is provided that has a cylinder guide housing which travels during the check function of the valve. The cylindrical guide housing has a clearance parameter, allowing for the selection of an optimal check response time. A dampening disk is provided inside the cylindrical guide housing, traveling within the guide during the relief function of the valve. The dampening disk has a separate clearance parameter, allowing for the selection of an optimal dampening capacity and fluid circuit stability. As such, the check and relief clearance parameters are independent of each other to allow both the check and relief functions of the valve to be optimized.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: October 26, 2010
    Inventor: Kevin J. Landhuis