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| Number | Title | Issue Date |
| 7210500 | Methods and apparatus for mechanically adjusting a null offset in a torque motor of a servovalve A servovalve assembly includes a motor having a flapper shaft. A flapper couples to a first end of the flapper shaft such that the flapper shaft orients the flapper between a first nozzle and a second nozzle of the servovalve assembly. An adjustment assembly adjusts... | 05/01/2007 |
| 7082726 | Butterfly valve for skylight A valve for selectively blocking the light passageway of a skylight includes a cylindrical shroud and first and second semicircular butterfly valve elements that pivot on respective axles within the shroud to selectively block the skylight. The axles can ride on a c... | 08/01/2006 |
| 7063099 | Exhaust gas control valve, apparatus and method of controlling exhaust gas flow The present invention is directed to an exhaust gas control (EGC) valve. The EGC valve comprises a valve housing having at least one inlet port, at least one outlet port, and a flow channel having a centerline extending between the ports. A valve seat is adjacent an... | 06/20/2006 |
| 6932100 | Flapper type fill tube check valve A flapper valve for push-in snap-lock attachment to a spud to be welded to a fuel tank and attached to a flexible filler tube hose. The flapper has an annular flexible seal overmolded thereon, preferably of elastomeric material. The flapper has a pair of trunnions, ... | 08/23/2005 |
| 6688321 | Method and apparatus for a flow regulator having an integral hinge A device for regulating the flow of gas from an environment. The device includes a shell forming a path through which fluid flows. A fixed grate is disposed in the path so that as fluid flows in the path the fixed grate does not move. A movable grate asse... | 02/10/2004 |
| 6679289 | Swing check valve The present invention relates to a light weight check valve for use in bulk material transfers that incorporates a smooth, generally spherical interior cavity to minimize flow inefficiencies. The check valve is made from two portions: a body portion and a... | 01/20/2004 |
| 6679283 | Valve inspection chamber A valve inspection chamber includes a housing having a vertical inspection and valve retrieval opening. A valve cassette is provided which includes a frame and a valve member movable relative to the frame between an open position and a closed position. A ... | 01/20/2004 |
| 6637449 | Pressure sensible valve for exhaust muffler and method of assembling same A valve seat structure is secured to an outlet end of a passing pipe installed in an exhaust muffler. The valve seat structure includes a flat seat surface portion which extends around the outlet end of the passing pipe. A valve plate structure is pivotal... | 10/28/2003 |
| 6443181 | Backflow prevention apparatus A check valve apparatus, usable in a double check valve backflow preventer apparatus, comprising a valve seat, a clapper pivotally coupled to the valve seat, a seal positioned to sealingly engage the clapper and valve seat when the clapper is closed again... | 09/03/2002 |
| 5826609 | Sewer inspection chamber with back-flow prevention valve and method and apparatus for installing valve in sewer inspection chamber An inspection chamber for use in sanitary sewer systems has an integral back-flow prevention valve. The valve can be installed through an access pipe with the inspection chamber in place underground. The valve does not interfere with the installation or r... | 10/27/1998 |
| 5822984 | Alternate valve assembly for smoke re-combustion device An alternate valve assembly for a smoke re-combustion device of a engine includes a pair of alternate valves which are symmetrically installed at each inlet of filters connected with branches of an exhaust manifold. Each of the valves comprises a valve bo... | 10/20/1998 |
| 5797423 | Device for cutting off a flow in a conduit for fluide A device for cutting off the flow in a conduit for fluids, consisting of a sluice (2), transversely arranged in a conventional conduit for fluids (1) between two flanges (3), one or two flanges (3) being fitted with a tab (6), a hole and axle (7) around w... | 08/25/1998 |
| 5785077 | Easily replaceable valve An easily replaced valve for a conduit through which materials are transported by a stream of gas. A body housing a valve gate can be fastened to the conduit, where it is held in a required position with respect to an opening defined in the conduit. Strap... | 07/28/1998 |
| 5671769 | Swing check valve and method for repairing same A swing check valve, which is adapted for automatically inhibiting back flow of fluid from an outlet thereof to an inlet thereof, includes a clapper member and a housing. The housing has a first body portion, which includes its own valve seat and its own ... | 09/30/1997 |
| 5458148 | Fluid flow control damper assembly and method A fluid flow control damper assembly and associated method are characterized by a self-contained unit comprising a support base for external mounting to a side of a duct, a damper vane mounted to the support base for movement between open and closed posit... | 10/17/1995 |
| 5076316 | Flow control valve A flow control valve for selectively opening and obstructing a flow passageway defined by a conduit. The valve has a mounting block, first and second valve wings, each mounted to the block for rotation about parallel axes between open and closed position,... | 12/31/1991 |
| 4921003 | Shut-down valve Shut-down valve intended for use in a subwater/subliquid position, for instance in subsea pipelines for liquid/gas. It is an object to prevent the medium surrounding the valve, to penetrate the pipesystem which is being served by the valve, and at the sam... | 05/01/1990 |
| 4739792 | Valve A valve consists of a housing provided with a closing opening, a closing member shaped as a part of a ball face, fitted turnably in the housing and resiliently connected to a pivot shaft, and of an annular sealing face. The closing member is connected to ... | 04/26/1988 |
| 4498492 | Dust valve and trap A dust trap is disclosed including a pair of coaxially mounted dust valves. Each valve has a valve body with a flow path therethrough. A cylindrical seat is mounted in each body and a frustro conical flapper is provided having an angled surface which seat... | 02/12/1985 |
| 4475571 | Sewer relief valve An improved sewer relief valve which is vandal-proof and automatically opens responsive to a back flow of sewage and drain water within a plumbing system.... | 10/09/1984 |
| 4469122 | Modular check valve A fluid check valve having a cylindrical tubular body member which is symmetrical and is adapted to receive a pair of opposed head members which have suitable coupling ends formed thereon. The head members may be threaded on to the body or secured to the ... | 09/04/1984 |
| 4304254 | Dust trap valve with removeable double-life door and valve seat member A dust valve for the discharge line of a dust collection system includes a removable closet with two wear surfaces and a coacting removable valve door with two wear surfaces mounted within the valve body. Once the coacting wear surfaces on the closet and ... | 12/08/1981 |
| 4253485 | Valve for opening and closing a fluid conduit A valve for opening and closing a fluid conduit of the type having a generally wide cross section, the conduit having a transverse slit therein to allow for movement of a shut-off plate therethrough. The shut-off plate has a spherical shape and defines a ... | 03/03/1981 |
| 4249563 | Manifold for replacing relief valves A manifold mounting pairs of relief valves in side-by-side clusters having a slide-rod interlock cooperating with swing-mounted clapper discs and operationally engaging handles connected thereto for selectively isolating one valve at a time from pressure ... | 02/10/1981 |
| 4190074 | Pressure equalization valve and technique for shaft furnace A valve suitable for use in equalizing the pressure in chambers of a blast furnace charging installation includes a seat member which may be removed for servicing through translatory movement perpendicular to the valve flow axis. The valve is also charact... | 02/26/1980 |
