Class 251/173 - Butterfly valve

Subclass of Class 251 - Valves and valve actuation
Definition: Devices in which the valve is of the butterfly type.
No. of patents: 97
Last issue date: 11/06/2007

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Number	Title	Issue Date
7290771	Bellows seals for thermoacoustic devices and reciprocating machinery A bellows has an elongated bellows body defined by a flexible wall. The wall encloses a volume and extends between a first end and a second end. The body has a cross-sectional shape and a cross-sectional dimension that are generally constant between the first and se...	11/06/2007
7261276	Flow 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
7243901	Rotary valve apparatus and associated methods A rotary valve is provided with an elliptical valve disc that seats against a seal element operatively mounted in an elliptically shaped depression formed in the rigid annular portion of a seal cartridge structure carried by the valve body. Due to the elliptical sha...	07/17/2007
7225825	Valve seal and method of installing a valve seal An assembly comprises a valve, a valve seal, and a piece of epoxy. The valve comprises a valve gate, a housing, and a plurality of screws. The housing comprises a fluid passageway and a groove that extends into the housing from the fluid passageway. Each of the scre...	06/05/2007
7188481	Adjustable damper actuator An actuator for controlling the position of a damper. It is an adjustable damper actuator that can actuate a damper to have positions that are other than fully open and fully closed. The actuator has adjustable stops for attaining a partially closed or partially ope...	03/13/2007
7117745	Process seal for process control transmitter A process control instrument for coupling to a process is attachable to a metal flange. The flange has a first passageway adapted to be filled with process fluid. The process control instrument includes a body having an opening adjacent to the first passageway for r...	10/10/2006
7080820	Elliptical 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
7080558	Process seal for process control transmitter A process seal for a process control transmitter is provided. The seal includes a contact region which provides a metal to metal seal against a coupling flange. ...	07/25/2006
7032884	Outflow valve butterfly plate retention pin Methods and apparatus for retaining a butterfly plate within a valve housing after complete drive shaft failure. More particularly, the present invention is directed to the use of a pin extending between the butterfly plate and the valve housing where an end of the ...	04/25/2006
7007926	Flap valve having dual piston sealing rings The invention relates to a valve comprised of a housing with a valve seat for a flap that is rotatably mounted on a drive shaft. The exterior of the flap is provided with a first piston sealing ring and a second piston sealing ring that are placed inside an encircli...	03/07/2006
6955181	Valve body and seal assembly A valve seal assembly comprising a valve body having one or more peripheral integral seal retention grooves and one or more peripheral elastomeric seals, each seal being cast-in-place in an integral seal retention groove having adhesion-inhibiting surfaces and offse...	10/18/2005
6938879	Valve seal with pressure relief channels and expansion voids A flexible, resilient incompressible seal for a butterfly valve is disclosed formed from a loop having a perimeter mounting surface and a perimeter sealing surface with first and second oppositely disposed axial surfaces extend between the perimeter sealing and moun...	09/06/2005
6840502	Flap valve for fuel aggregates A flap valve for fuel aggregates, such as fuel cells, comprises a flap arranged within a flow channel. A shaft for pivoting the flap is connected to the flap. Further, a seal disposed in a recess of the channel wall is provided, which comprises at least one pressure...	01/11/2005
6722630	Shut-off device with a swivellable butterfly valve and an entropy-elastic annular seal held on a backup ring A shut-off device (1) includes a housing (2) and a butterfly valve (4). The butterfly valve (4) can be swivelled using a drive shaft (3). When the butterfly valve (4) is closed, the butterfly valve (4) is sealed off f...	04/20/2004
6533241	Retaining piece of a ball valve A retaining piece of a ball valve is provided with an engaging surface and a groove defined to provide resilience to the engaging surface which engages with an outer surface of a ball. With such an arrangement, the engagement between the outer surface of ...	03/18/2003
6412755	Door for changing over air passage A sealing member 11 made of an elastic material secured to the outer peripheral edge of a door plate 10 is provided with support portions 11a and 11b that extend in a direction to intersect the door plate 10, and the support portions 11a and 11b are direc...	07/02/2002
6149130	Butterfly valves The valve includes a closure disc (34) sealable at its rim to a valve seat (18) so that in this position the seat (18) and rim define between them an annular space (54) which is connected to a port (60) by passages (54, 56, 58) extending through a mating ...	11/21/2000
6123318	Throttle body module having improved blade to ledge sealing A throttle body (11) has a through-bore (18), a circular throttle blade (20) of nominal uniform thickness is disposed within the through-bore and on a cylindrical shaft (22). The through-bore has two generally semi-circular ledges (56, 58) spaced upstream...	09/26/2000
6116575	Seat structure for ball valve A seat structure for a ball valve which includes a seat member formed by rolling up an alternate stack of a thin steel plate and a thin graphite plate. The seat member is provided with a fixture portion fixed into an inner periphery of the valve body and ...	09/12/2000
6045121	Bi-directional valve seal mechanism A seating ring having a unique surface designed to engage with the convex outer surface of a valve disc, thereby providing a uniquely tight and bi-directional seal. The seating ring has a first, free end, an angled contact point adjacent to the free end, ...	04/04/2000
5947445	Rotatable valve assembly Rotatable valve assembly includes a mounting mechanism for rotatably mounting a valve in a housing. The mounting mechanism includes a shaft having an outside end extending through the housing. A conversion mechanism converts fluid pressure in the housing ...	09/07/1999
5865422	Bi-directional valve seal mechanism A valve including a valve body having a centrally disposed aperture, a rotatable shaft, and a valve disc. The disc has a circumference with an outer edge and is disposed about the shaft such that the disc rotates to an open position and a closed position ...	02/02/1999
5538029	Method for adjusting valve sealing engagement A method for adjusting sealing engagement of a valve seat includes providing a valve with a disk in a flow passageway and a valve seal with a seat positioned for sealing engagement with the disk, the valve body and seal together defining a channel having ...	07/23/1996
5330156	Seal arrangement for valves A sealing arrangement for a valve or shaft is disclosed which is designed to respond to movements of a rotatable element in a particular manner and to increase sealing pressure with increasing fluid pressure. The seal undergoes a radial compressive type m...	07/19/1994
5295659	Shaft seal for butterfly valve The present invention comprises an improved two-way dynamic shaft-sealing member for a fluid transport system having a butterfly valve with an inflatable seal with the improved shaft-sealing member including a rigid race secured to and carried by the inte...	03/22/1994
5294091	Stop cock for a liquid container A stop cock for a liquid container, comprising a substantially annular valve housing, a circular valve rotatably mounted in the valve housing, a handle mounted on an operational shaft for rotating the valve between a closed and open position, a seat mount...	03/15/1994
5203539	Pipeline valve apparatus A pipeline valve is provided which includes a valve body having a spherical bore with a cylindrical valve seat. The cylindrical valve seat is positioned along the centerline of the spherical valve body and can be machined in the valve body. Alternatively,...	04/20/1993
5160118	Pipeline valve apparatus A pipeline valve is provided which includes a valve body having a spherical bore with a cylindrical valve seat. The cylindrical valve seat is positioned along the centerline of the spherical valve body and can be machined in the valve body. Alternatively,...	11/03/1992
4905966	Seat structure of valves Seat structure of valves comprising a seat ring, at least one fixing member secured to a valve body and a concave provided between the body and the fixing member for setting the seat ring therein. The seat ring is provided with an inclined contact face to...	03/06/1990
4898363	Butterfly and ball valves In a fire-safe butterfly valve a polymeric seat ring is resiliently biassed by a resilient metal energizer ring to hold the polymeric seat ring engaged with the closed valve disc, and an independent metal sealing ring permanently engages with the closed v...	02/06/1990
4872642	Seal mechanism for butterfly valve with press contacting seal effective in both inflow and outflow directions A seal mechanism for butterfly valve of concentric opening with press contacting seal, which comprises a ring-formed seal metal arranged surrounding the valve body under insertion in a radially displaceable manner in a circumferential groove formed around...	10/10/1989
4836499	Butterfly valves The present invention comprises a transport system having an annular inflatable seal which has an annular interior domed portion which expands as an integral unit until it contacts the edge of a butterfly valve which engages the domed portion to form a sl...	06/06/1989
4796857	Metallic seal for high performance butterfly valve A high performance butterfly valve utilizing a thin sheet metal annulus to provide sealing between a valve casing and a rotary disc type valving member. The design of the sealing element provides for a self-sealing at all pressures, with augmentation of t...	01/10/1989
4712768	Quarter turn valve The disclosure is directed to a high performance butterfly control valve which may be applied and utilized in critical high pressure and/or high performance operation environments. In accordance with the invention, the vane of the butterfly valve is forme...	12/15/1987
4676481	Seal for high performance butterfly valve The disclosure is directed to a high performance, leak tight seal for use primarily in butterfly control valves. In accordance with a significant feature of the invention, the seal is arranged and configured whereby fluid pressure within the butterfly val...	06/30/1987
4638976	Rotary gate valve gasket and process for its manufacture A gasket for a rotary gate valve is made from a material that can be utilized only after sintering, such as a fluorocarbon polymer, and comprises a ring-shaped solid portion 15 surrounded by a coaxial, annular flange 16 for anchoring the gasket within the...	01/27/1987
4634097	Sealing device for throttle valves The invention relates to a sealing device for such throttle valves as comprise a valve housing with a valve seat and a pivotally mounted throttle member which may be pressed against the valve seat to bring about a sealing contact between two interacting s...	01/06/1987
4632360	Butterfly type valve seal A pivotally adjustable valve disc has a ring seal set in its grooved periphery for contact with a wall of a valve accomodating bore. A flexible, radially expansible member is in the valve groove in a backing relation to the ring seal. Passages admit press...	12/30/1986
4582080	Bidirectional cryogenic valves A bidirectional valve useful at all temperatures from cryogenic to extreme fire temperatures. The sealing means for the bidirectional valve comprises a metallic sealing element having a pair of spaced sealing lobes defined thereon which are coated with a ...	04/15/1986
4540457	Butterfly valve with pressurized O-ring sale A butterfly valve for use with corrosive fluids is constructed of fiberglass-reinforced plastic (FRP). The valve blade is mounted in the valve body on a shaft comprising a continuous strand fiberglass-reinforced plastic rod secured in a sleeve. Exposed en...	09/10/1985

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Class 251/173 - Butterfly valve