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Class 137/514.3 - End of valve forms dashpot chamber


Subclass of Class 137 - Fluid handling
Definition: Devices wherein the end of the valve has a dashpot chamber
No. of patents: 48
Last issue date: 09/30/2008


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NumberTitleIssue Date
7429167Scroll machine having a discharge valve assembly
A discharge valve assembly is provided for preventing reverse rotation of a scroll compressor. The discharge valve assembly includes a cup-shaped valve member slidably engaged with a central post of a retainer member. The cup-shaped valve member includes notches in ...
09/30/2008
7354363Magnetorheological fluid V-ribbed belt tensioner with through shaft
A tensioner for a power transmitting belt is provided having a base, an arm pivotably attached to the base, a pulley rotatably attached to the arm and a spring operatively connected to the arm and the base for urging the arm in direction to tension the belt. A hydra...
04/08/2008
7300260Special fluids for use in a hydrostatic transmission
A positive displacement piston unit is provided that utilizes a magnetorheological (MR) or electrorheological (ER) fluid as the transmission fluid. Each cylinder of the invention has an intake port connected to the suction port of the hydrostatic pump and an output ...
11/27/2007
7287547Inlet or outlet valve for a pump
An inlet or outlet valve for a pump comprises a closing body (3) pretensioned by a spring element (4). The closing body (3) can open or close a passage on a valve seat (2). The valve also comprises a guide element (5) for guiding t...
10/30/2007
7275559Pressure control valve
A pressure control valve is disclosed which includes an inlet; an outlet; a valve body between the inlet and the outlet; a piston having opposed smaller and larger ends each having a circumferentially extending piston wall, the piston being slideably received within...
10/02/2007
7246635Automatic flow rate control valve
An automatic flow rate control valve, includes a tubular body, defining a flow path between inlet apertures having a gradually variable cross-sectional area and a fluid outlet at one end; a flow control piston is axially movable within the tubular body, under opposi...
07/24/2007
7228869Pressure limiting valve
What is disclosed is a a pressure limiting valve comprising a valve body, the axial movement of which is damped by means of a damping device. In accordance with the invention, the damping device includes a damping chamber formed on the return side, that is subjected...
06/12/2007
7121291Check valve, auxiliary circulating device and method for driving the auxiliary circulating device
A check valve includes a casing member, a tear-drop shaped ball member installed in the casing member, a latching member which is formed at an inner wall of the casing member and an airtight valve which is formed at an inner wall of the casing member. When forward f...
10/17/2006
7108285Road and rail tankers
A tanker trailer includes tanks mounted one behind the other to a chassis using a flexible mounting system. The mounting allows individual tank movement in upward and downward directions from a rest position. Close nesting is accomplished by provided adjacent tanks ...
09/19/2006
7077158Velocity head compensated valve assembly
A valve assembly includes a valve body configured to define a chamber forming a primary flowpath between an inlet port and a discharge port, an isolator disposed inside said chamber, and a poppet having a bore. The isolator is defined by a skirt and a stem, with the...
07/18/2006
7066722Discharge valve for compressor
A compressor assembly including a compressor mechanism, a compression chamber and a discharge chamber. A discharge port provides fluid communication between the compression chamber and the discharge chamber. A valve seat circumscribes the discharge port. A discharge...
06/27/2006
6971405Check valve for fuel pump
A check valve for a fuel pump of a vehicle includes a valve housing adapted to be disposed in an outlet member of the fuel pump. The check valve also includes a valve guide disposed within the valve housing and a valve seat disposed within the valve housing and spac...
12/06/2005
6966302Fuel system and flow control valve
A valve for controlling flow of a fluid includes a valve body defining at least in part an inlet, an outlet, at least one chamber, and an orifice in communication with the chamber. A valve member is received at least in part in one chamber for reciprocation or rotat...
11/22/2005
6910502Decoupled check-relief valve
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 optim...
06/28/2005
6899113Pressure relief valve
A pressure relief apparatus including a housing, a valve disposed in the housing, the valve having a first shoulder, a retainer disposed between the housing and the valve spool, the retainer having a second shoulder, a biasing member disposed between the first and s...
05/31/2005
6851443Apparatus and method for preventing resonance in a fuel vapor pressure management apparatus
A device and method for preventing resonance in a fuel vapor pressure management apparatus of a fuel system supplying fuel to an internal combustion engine. The fuel vapor pressure management apparatus performs leak detection on a headspace of the fuel system, perfo...
02/08/2005
6848893Compressor check valve
A compressor check valve having a valve bolt and a valve bolt cover for noise reduction and mitigation of impact from a valve bolt on the valve bolt cover. A bolt insertion hole is provided in the cover to receive the valve bolt. A pressure conduction hole penetrati...
02/01/2005
6637456Safety valve
The invention concerns a safety valve, in particular for low pressures and aggressive media, with an inlet which ends at the top in a valve seat upon which lies in a sealing manner a weight-loaded sealing body. A certain overpressure below the valve seat ...
10/28/2003
6532989Hydraulic distributor
A hydraulic distributor that has a regulating balance including a housing hollowed in the distributor body and containing coaxially a fixed central core. A tubular plunger is interposed sliding freely, coaxially, between the core and the housing and co-op...
03/18/2003
6532987Relief valve
A relief valve having a cylindrical case with one side thereof communicated with a fluid-pressure source, a relief piston accommodated in the cylindrical case and slidable therein, a return spring for pressing the relief piston against the fluid-pressure ...
03/18/2003
6470909Hydraulic system
A hydraulic system for a motor vehicle has at least one pressure restricting valve with a housing that has two or more connections. At least one conduit cross-section in the housing can be closed by means of a closing body that is movable axially against ...
10/29/2002
5931191Flow control valve for passing two fluids in opposite directions
A flow control valve includes a piston moveable in a cylindrical chamber between an inlet opening and an outlet opening. The piston head has a maximum diameter smaller than the wall of the chamber to define a fixed orifice. The opposite end of the piston ...
08/03/1999
5832954Check valve assembly for inhibiting Helmholtz resonance
A check valve assembly is disposed in a flow path of a high pressure hydraulic actuating system between a source of pressurized fluid and a pressure responsive mechanism to limit flow to a single direction therebetween. A valve housing defines a fluid pas...
11/10/1998
5669356Control valve
A two part pressure unloading delivery valve for a fuel injection pump comprises an annular valve member within which is slidable a plunger. The valve member is biased into engagement with a valve seat by means of a spring and is lifted from the seat by f...
09/23/1997
5577533Flexured shaft poppet
In a valve, the valve poppet member is constructed from a spring material where a tubular wall portion has a spiral wall configuration intermediate of a supporting base and a valve head. The spiral wall configuration has inner and outer diameters, a speci...
11/26/1996
5404903Smart vent valve for cargo tanks employed in transporting hazardous commodities
A "smart vent" valve is mounted on a liquid storage tank employed in the transportation of liquid. The valve prevents overpressurization of the tank due to increases in vapor pressure and prevents discharge of liquid through the valve in response to press...
04/11/1995
5230364Pressure relief valve
A proportional pressure release valve comprising a valve body incorporating a valve seat, a valve closure member mounted in the valve body and cooperable with the valve seat to control flow of fluid through the valve from an inlet pressure port to an outl...
07/27/1993
5224511Spring-loaded safety valve
A spring-loaded safety valve provided with an integrated damping element that achieves a damping effect by the dissipative action of a shearing current and which involves a single-layer or multiple-layer virtually coaxial arrangement of tubes or active su...
07/06/1993
5183075Check valve
Check valve with a movable valve element (3), especially a valve element that is manufactured from a ball, said valve element possessing a spherical surface (7) which faces a valve seat (5) and serves as a sealing surface, possessing a radial guidance zon...
02/02/1993
5161653Electro-rheological shock absorber
An electro-rheological controlled shock absorber for use on motor vehicles is disclosed. The shock absorber employs a fluid filled cylinder, a piston member traveling in the cylinder, and an electro-rheological valve controlling the passage of fluid throu...
11/10/1992
5158109Electro-rheological valve
A general electro-rheological valve is disclosed used in controlling the flow of fluids in a variety of applications. The valve comprises an inlet in communication with a fluid source, an outlet for transporting the fluid out of said valve, and an oscilla...
10/27/1992
5129419Pressure control valve
A valve having a valve poppet which is positioned by the opposing forces of a spring and inlet fluid pressure, and a dashpot located out of the path of fluid flow through the valve for damping movement of the poppet during rapid changes in fluid pressure ...
07/14/1992
5048553Relief valve with overturn surge control for storage tank
A tank valve apparatus including a sealed piston assembly for regulating movement of a spring biased poppet, the poppet being in cooperative engagement with the sealed piston assembly and a valve seat of an associated valve opening, the valve opening bein...
09/17/1991
4867603Device for preventing flooding caused by sprinkler failure
A device for protecting irrigation land local flooding caused by damaged sprinklers or broken risers. The device, in accordance with the present invention is designed to be situated within a piping component upstream of each individual sprinklers and it i...
09/19/1989
4859155Bypass valve for a displacement pump
A displacement pump bypass valve having an integral pressure modulator in a piston of the valve, the piston located in a bore formed through the pump housing between the pump inlet and pump outlet, the piston having an internal, cylindrical expansion cham...
08/22/1989
4842198Device for damage protection against local flooding caused by sprinkler failure
Irrigation systems which use sprinklers can cause local flooding in the event of either a sprinkler head failure or a broken riser. The result is localized crop damage, irrigation water wastage, land erosion, and deprivation of water for the remainder of ...
06/27/1989
4766929Check valve
An improved check valve is disclosed, which prevents the valve disk from slamming against the valve seat when the fluid flow in the line is suddenly reversed. The valve includes a disk and a seat, the disk being movable towards and away from the seat in r...
08/30/1988
4756334Check-valve assembly, in particular for a pressurized water reactor
This check-valve assembly, adapted to close a fluid flow circuit without creating overpressures or hammering in this circuit, comprises a tubular body (1) connected at both of its ends to a respective pipe section (2, 3), a closure member (4) mounted to b...
07/12/1988
4693270Check valve
An improved check valve is disclosed, which prevents the valve disk from slamming against the valve seat when the fluid flow in the line is suddenly reversed. The valve includes a disk and a seat, the disk being movable towards and away from the seat in r...
09/15/1987
4489752Guard guided multiple element flow configured poppet valve
A multi-element poppet valve for use with high pressure gas compressors wherein the over-hang of the poppet element head has been substantially eliminated to strengthen the poppet element. The stem of the poppet element is aerodynamically configured in an...
12/25/1984
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