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Class 251/172 - Fluid pressure


Subclass of Class 251 - Valves and valve actuation
Definition: Devices applied by fluid pressure.
No. of patents: 204
Last issue date: 08/23/2011


1            
NumberTitleIssue Date
8002237Seat arrangement with cavity pressure relief for a ball valve
A ball valve seat arrangement is provided that permits relief of cavity pressure. The arrangement includes a valve body for receiving a resilient annular seat. First passages in the seat provide communication between the valve cavity, and a space formed between the ...
08/23/2011
7988127Valve with self-expanding seals
A valve device includes a valve body having a cavity, a stopper member in the cavity, and a fluid passage in fluidic communication with the cavity when the valve device is in an open state. A stem is coupled to the stopper member for driving the stopper member to op...
08/02/2011
7350765Double-stop floating ball valve
Valve assemblies and methods of designing valve assemblies having a valve ball, an upper seat, and a lower seat. When fluid pressure is applied to the valve ball, the valve ball will float in the axial direction between an upper position, a neutral position, and a l...
04/01/2008
7350766Knife gate valve with multi-piece elastomer liner and/or o-rings at flange interface
A knife gate valve comprising a two-piece valve body, a knife gate, an elastomeric transverse seal, an elastomeric perimeter seal, and a pair of elastomer liners. Each elastomer liner is positioned between the knife gate and one of the mating valve body halves and d...
04/01/2008
7337797Ball valve and method of manufacture
A ball valve having a ball valve assembly disposed within a unitary, elongated tube is provided. The unitary, elongated tube has a first, inlet end, a medial portion having a cross-sectional area, and a second, outlet end. The first, inlet end is a swedged tube havi...
03/04/2008
7325783Valve seat edge relief profile
A valve seat has an outer surface, a rearward end, a face and a forward end. A passage extends from the rearward end to the face. A valve element slidingly contacts the face. Stress relief flanges are located on the face in areas of high bearing stress. Each flange ...
02/05/2008
7309057Guillotine valve
A guillotine valve, used for example in pipelines includes a single block body incorporating sealing elements, each in the form of an annular hose section, which are made of an elastomeric material and which are hollow along their entire circumference, each providin...
12/18/2007
7278444Valve assembly having improved pump-down performance
A valve assembly including a housing having a flow path extending to an outlet and a valve seat in the flow path and around the outlet, a slide plate located in the housing and movable transversely to a longitudinal axis of the flow path between a closed position, i...
10/09/2007
7275564Pigging ball valve
A pigging ball valve with a housing and ball core supported for rotation within the housing. The ball core sits on a valve seat, which is supported by a seat carrier. The valve seat carrier has three distinct diameters that locate the seat in the housing and thus pr...
10/02/2007
7261276Flow regulator valve
An apparatus such as a multiple orifice valve (MOV) for controlling a flow of pressurized fluid. A housing directs the flow from an inlet to an outlet and supports an interior stationary surface. A moveable surface selectively impedes the flow and is disposed in fac...
08/28/2007
7249750Pressure balanced fluid control device
The present invention is directed to a pressure balanced fluid control device. In one illustrative embodiment, the device comprises a body, a bonnet coupled to the body, a valve stem operatively coupled to a gate positioned in the body, a valve stem seal positioned ...
07/31/2007
7207352Bushing for thermally independent bypass air metering valve
A bypass air metering valve is provided with a stationary case flange having a plurality of slots, a bushing positioned within each of the slots, and a metering ring positioned so as to ride on a surface of each respective bushing. Each bushing creates a gap between...
04/24/2007
7182315Exhaust-gas recirculation valve
An exhaust-gas recirculation (EGR) valve (10) comprises a valve opening (14), a valve member (16) that can be moved between a position which closes the valve opening (14) and a position which releases the valve opening (14), and fu...
02/27/2007
7178786Stem construction for rotatable valve body
A valve stem construction for a manipulable valve member used to control fluid flow through a valve. The valve stem extends externally of the valve housing for engagement by a valve handle used to manipulate the valve member between open and closed positions. The va...
02/20/2007
7124776Water faucet having different output effects
A water faucet includes a valve body, two conducting members, a valve seat, two control valves, two control handles, and two control plates. Thus, the water faucet is available for an upright water outlet pipe and a horizontal water outlet pipe, so that the water fa...
10/24/2006
7121523Fluid control valve
Particularly in an engine that has been inactive for a substantial period of time at a cold temperature, fluid forces acting on moving members, such as electronically-activated fluid control valves, may be significant until the engine warms up. A way to reduce the f...
10/17/2006
7121295Internal blow out preventer ball and seat
An internal blow out preventer is provided that includes a ball valve including a tubular assembly having a central passageway with upper and lower seats mounted therein. A ball is rotatably received between the upper and lower seats and includes an external surface...
10/17/2006
7114702Slide valve
In a slide valve, especially for coating installations, for fluidic separation of two modules or chambers, interconnected through an opening, containing at least one slide plate, integrated in a housing transfixed by said opening, and which may be bidirectionally mo...
10/03/2006
7093462Multi-way valve and refrigerating machine with multi-way valve
A multi-way valve, particularly for a refrigerant circuit, includes a housing having a number of inlets and outlets and a chamber with a number of seats respectively associated with an inlet or outlet. The multi-way valve also includes a closing element that can mov...
08/22/2006
7089960Ball valve
The present invention is a ball valve which may be attached to a fluid pipe for connection/disconnection between an entrance and an exit. More particularly, the present invention is a ball valve having a discharge orifice communicating with ambient air in addition t...
08/15/2006
7080822Ball valve with a single piece ball-stem and an integrated actuator mounting flange
A two piece side split ball valve with internal corrosion resistant plastic lining (4, 5), with an integral actuator mounting flange (30) for easier, cheaper & direct mounting of any standard actuator, with a single piece ball-stem (3, 7) for ac...
07/25/2006
7080820Elliptical sealing surface for butterfly valve
A reduced component wear valve is comprised of a valve body having a passage therethrough and a disc attached to a rotatable shaft. The disc is utilized with a seal forming a gap between the disc and the seal proximate to the rotational axis of the disc. When the di...
07/25/2006
7066447Sleeve valve with adjustable flow characteristics
A sleeve valve has a valve body and a flow passage through the valve body. The flow passage has a longitudinal axis, a valve plug positioned therein, and a slidable sleeve received therein. The sleeve is movable in an axial direction between an opened and a closed p...
06/27/2006
7036792Valve arrangement for a vacuum pump
A valve arrangement for a vacuum pump includes a valve head displaceable substantially perpendicular to a flow direction of a fluid through the valve arrangement, a valve seat, and a valve spring for biasing the valve head into a flat abutment engagement with the va...
05/02/2006
7032880Valve with pressure adaptable seat
A seat assembly extending about an inlet passage of a valve and engaging a valve member is disclosed. The seat assembly includes an annular seat carrier having an annular groove formed therein, and a seat positioned in and extending from the annular groove of the se...
04/25/2006
7004451Ball cock
A ball cock has a housing that includes at least two housing parts. Each part has a flow-through channel as a flow-through path. The ball cock also includes a ball-shaped shut-off element having a passage bore as a flow path for optionally connecting the flow-throug...
02/28/2006
7004452Valve seal assemblies and methods
A method of sealing a valve engaging member to a valve body about a borehole and structure thereof. Two seal members disposed on either side of the valve engaging member include a seat member adjacent the valve engaging member and a pocket insert adjacent the seat m...
02/28/2006
6978977Dual lift system
Valve and valve lift system suitable for use in a regenerative thermal oxidizer, and oxidizer including the switching valve. The valve of the present invention exhibits excellent sealing characteristics and minimizes wear. In a preferred embodiment, the valve is sea...
12/27/2005
6969047Ball valve seat seal
A ball valve includes a body having a passageway there through with a ball member disposed in the passageway and mounted for selective rotation between valve open and valve closed positions to control fluid flow. A pair of flange grooves are provided in the body on ...
11/29/2005
6966537Valve with seat assembly
A valve is disclosed having a telescoping seat assembly that fits into a pocket or enlargement of a flow passageway through the valve body. An outer seat element seals with the pocket utilizing a plurality of seal assemblies to seal with the pocket whereby pressure ...
11/22/2005
6957816Loop seal for knife gate valve
A seal for use with a knife gate valve is disclosed, the seal having a loop to which is attached an axially facing sealing lobe. A sealing surface is positioned on the sealing lobe, the sealing surface having an axially projecting leading edge and flanking annular s...
10/25/2005
6948699Retainer for a ball valve seat
A ball valve comprises: a valve body; a pair of valve end caps; a valve ball rotatably positioned within the valve body; a pair of valve seats, each valve seat being positioned between the valve ball and a respective valve end cap and engaged therewith; and at least...
09/27/2005
6935613Compact integrated flanged isolator ball valve
The present invention provides a flanged ball valve device which can be connected, as an integrated compact unit, to a pump at the valve flange end of the device by means of an integral flange and to various types of piping systems at the pipe end of the device by m...
08/30/2005
6929244Interference-fit seal for gate valves
A gate valve has seat rings pressed into counterbores to form seals. Each counterbore is located at an intersection of a flow passage with a central cavity of a body of the gate valve. The counterbore has a cylindrical constant diameter sidewall. The seat ring has a...
08/16/2005
6805332Inflatable seat valve
A hand-operated hemispherical or spherical valve that provides an improved seal when dealing with fluids containing, or consisting entirely of, particulate matter is provided by the present invention. The valve utilizes an inflatable elastomeric valve seat that inte...
10/19/2004
6783111Dual lift system
Valve and valve lift system suitable for use in a regenerative thermal oxidizer, and oxidizer including the switching valve. The valve of the present invention exhibits excellent sealing characteristics and minimizes wear. In a preferred embodiment, the valve is sea...
08/31/2004
6648001Valve with seat assembly
A rotary plug valve is disclosed in a preferred embodiment that has two telescoping seat assemblies that fit into respective recesses provided in the valve body surrounding a passageway through the plug valve. A valve chamber is formed in the valve body i...
11/18/2003
6510867Pressure relief valve
A pressure relief valve has a main valve body, a fluid inlet passageway, a fluid outlet passageway, and a piston contained within the main body. The piston has a piston head, slidingly and sealingly engaged within a pressurized cavity in the main valve bo...
01/28/2003
6425570Ball valve having retractable sealing member
A ball valve having an upstream seat (92) with the seat actuated by outside pressure (14, 16). Retraction members (100, 102) continuously urge seat (92) to a retracted position out of sealing engagement with the ball. A sealing member (104) fits loosely w...
07/30/2002
6345805Rotary valve with seat assembly
A rotary plug valve is disclosed in a preferred embodiment that has two telescoping seat assemblies that fit into respective recesses provided in the valve body surrounding a passageway through the plug valve. A valve chamber is formed in the valve body i...
02/12/2002
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