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| Number | Title | Issue Date |
| 7841359 | Check valve A check valve assembly with an extended operational life. The check valve assembly includes a poppet with conically shaped arms and planar seating surfaces. The planar seating surfaces conform to seating surfaces in the valve assembly. The poppet moves back and fort... | 11/30/2010 |
| 7431048 | Backflow preventer A backflow preventer (1) is provided that, in an insertable housing (2) thereof, includes a valve member (6) located in a housing interior (5). The valve member (6) sealingly rests against a valve seat (7) in the closed posi... | 10/07/2008 |
| 7322557 | Chemical liquid control valve A chemical liquid control valve is provided with a barrier on an outer circumferential end portion of a protruding part (an outer circumferential bottom portion of a valve seat). The barrier is placed so that an angle between the center line of an outlet passage and... | 01/29/2008 |
| 7137491 | Shock absorber non-vibrating check valve assembly A check valve assembly for a shock absorber includes a tapered valve seat and a polygonal check valve which includes a plurality of flat surfaces. Each pair of flat surfaces intersects at a linear engagement surface which slidably engages a cylindrical chamber. When... | 11/21/2006 |
| 7108147 | Vacuum pump valve A vacuum pump valve includes a valve body and a suction diaphragm. The valve body includes a sealing platform sealedly attached on the container at the opening thereof, and a guiding sleeve upwardly extended from the sealing platform to form a suction channel, where... | 09/19/2006 |
| 6988510 | Disc check valve A free floating disc check valve is provided by the present application. The check valve includes a seal disc having an integral truncated torroidal shaped portion. The torroidal shaped portion provides structural rigidity to the seal disc to minimize deflection of ... | 01/24/2006 |
| 6971862 | Appartus for preventing overheat of scroll compressor An apparatus for preventing overheat of a scroll compressor comprising: an overload preventing device for connecting or cut off a power source by a temperature and a current; a valve housing formed as a predetermined shape and fixedly coupled to the fixed scroll; a ... | 12/06/2005 |
| 6892754 | Poppet for a fuel vapor pressure management apparatus A device for 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, performs excess negative pressure relief... | 05/17/2005 |
| 6886592 | Sewer relief valve with integral disinfectant means A sewer relief valve assembly comprises a cylindrical sleeve dimensioned for insertion into a clean out which has an interior surface formed as a conduit and exterior threads adapted for mated engagement with the interior threads of the clean out. A valve means is d... | 05/03/2005 |
| 6761182 | Method for configuration of a valve A method of configuring a valve comprised of a valve seat, a valve stem, a valve guide, and a relief compression spring. The method comprises calculating a compression force required to move the valve stem relative to the valve seat, using that calculated force to m... | 07/13/2004 |
| 6666663 | Gas suction apparatus for a reciprocating compressor with a piston inertia valve A gas suction apparatus for a reciprocating compressor, including a piston having a gas flowing passage where refrigerant gas flows, being inserted in the compression space formed in a cylinder enabling linear reciprocating movement, a fixing means combin... | 12/23/2003 |
| 6132191 | Check valve for scroll compressor A series of check valves are disclosed for use in a scroll compressor which control and dampen the closing of the check valve to reduce noise during rapid pressure fluctuations encountered during normal operation and to control loss of gas in a discharge ... | 10/17/2000 |
| 6116270 | Piston valve A piston valve wherein a hollow piston type sleeve has a closed lower end surmounted by a sleeve which has a cylindrical outer surface which slides, and seals against a blank inner cylindrical surface portion of an outer body. Ports in the sleeve are move... | 09/12/2000 |
| 6029706 | Valve of a storage tank for transporting oils or chemical compounds A valve of a storage tank for transporting oils or chemical compounds avoids problems caused by crossing a suction path for external air with a pathway for outputting volatile gases from the storage tank. The valve includes an upper body having a circular... | 02/29/2000 |
| 5983929 | Air valve An air valve that comprises a concave, downwardly facing cover (4) which is carried by a pipe connector (1) connected generally coaxially thereto, wherein the upper edge-part of the pipe connector (1) is surrounded by the wall of the cover (4), a ring-sha... | 11/16/1999 |
| 5983927 | Inlet valve assembly The invention proposes an inlet valve assembly integrated in apparatus for dispensing a fluid contained in a tank, the valve assembly serving to isolate said tank at least during a dispensing stage during which said fluid is dispensed, said valve assembly... | 11/16/1999 |
| 5921276 | Piston-type check valve with diffuser An axial recess is formed in the downstream end of the diffuser body. An annular tail member is mounted on the downstream end of the valve piston. The tail member retracts into the recess when the piston is in the closed position and provides an extension... | 07/13/1999 |
| 5836170 | Vacuum release valve tube assembly A vacuum release valve for use in a refrigerated compartment such as a domestic refrigerator which allows a small amount of outside air to enter the refrigerated compartment to prevent a vacuum from forming in the refrigerated compartment caused by warm a... | 11/17/1998 |
| 5669412 | Two-piece check valve assembly A two-piece check valve device comprising a rubber sealing element and a plastic carrier member. A through bore in the plastic carrier member receives the sealing element, which is formed with an annular groove in which the carrier member is removably sec... | 09/23/1997 |
| 5620021 | Thermal check valve A thermal check valve for use in a gravity flow hot water recirculating system. The hot water system has a hot water heating tank, a water faucet, manifold piping from the hot water heating tank to the faucet, return piping from the faucet to the hot wate... | 04/15/1997 |
| 5383487 | Refill-prevention valve A refill-prevention valve has a housing. The housing has a first tubular section defining a first passage, a second tubular section axially projecting from the first tubular section and defining a second passage being in fluid communication with the first... | 01/24/1995 |
| 5286188 | Uni-directional anti-backsifting fluidization nozzle and a fluidized bed system utilizing same A fluidized bed system in which a plate is disposed in an enclosure and is adapted to support particulate material. A plurality of nozzles are supported by the plate for receiving air and directing the air through the plate and into the particulate materi... | 02/15/1994 |
| 5209257 | Sewer relief valve A vent for relieving pressure in a sewage collection system for buildings characterized by a buoyant float-closure which will easily open in response to fluid pressure to permit escape of gas or liquid from the system upon the build-up in the system of mi... | 05/11/1993 |
| 5048560 | Sealing valve assembly A valve assembly, particularly a breather valve assembly for fluid storage tanks, is described. This assembly comprises a valve housing including a fluid conduit and a valve seat defining a fluid outlet of the fluid conduit, and a pressure pallet sized an... | 09/17/1991 |
| 4827972 | Priority flow control valve An automatic switching valve mounted between two fluctuating pressure sources automatically switches from one source to the other to supply gas or liquid from the source that is under the higher pressure. A T- housing conveys gas or liquid from either sid... | 05/09/1989 |
| 4813817 | Plug valve A plug valve, a check valve for a plug valve, a pressure regulator for a plug valve, and a check valve for a conduit. A plug valve having a plug closure member for sealing off the open end of a conduit and thereby preventing flow of a first fluid through ... | 03/21/1989 |
| 4738277 | Improvement in rotatable taps A tap incorporating a tap body and a tap top assembly having an inner end in sealing engagement with the valve seat within the tap body and having a pair of ceramic discs in a housing within the tap top assembly for controlling fluid flow, and operable by... | 04/19/1988 |
| 4683910 | High-speed protective check valving for pressure transducers and the like Sudden increases in fluid pressure which could be injurious to the diaphragm and seals of a sensitive capacitive pressure transducer, or the like, are instantly protectively blocked or "checked" automatically by a miniature naturally-powered valve having ... | 08/04/1987 |
| 4657040 | Bypass reverse flow valve A filter assembly including a housing and a filter element which includes a bypass/reverse flow valve coaxially disposed within the housing with the filter element and includes a central opening therethrough coaxially aligned with the opening in the filte... | 04/14/1987 |
| 4625755 | Kelly mud saver valve sub A Kelly Mud Saver Valve Sub is provided having a tubular valve body with an annular seat fixed in the interior of the valve body. A tubular closure member is reciprocally mounted within the valve body, and is biased with a helical spring into a closing re... | 12/02/1986 |
| 4572233 | Lined check valve A check valve in which one half of the valve body has a number of integral guide fins extending radially into the flowway. The guide fins are discontinuous from one another at their radially inner ends. A liner on the interior of the valve body follows th... | 02/25/1986 |
| 4535807 | Automatic air valve device for ducts The device includes a tubular body, an annular flap cooperating with the tubular body, and a cover cooperating with the tubular body to form a channel or peripheral air inlet beneath the annular flap, which channel is closed by the latter. When a partial ... | 08/20/1985 |
| 4470767 | Vacuum pump with overload protection valve In a vacuum pump having a housing presenting a suction side and a pressure side, a connecting line connected between the suction side and the pressure side and a weighted valve mounted in the connecting line and having a part which is movable to open the ... | 09/11/1984 |
| 4274434 | Automatic low-friction check valve An automatic check valve, particularly adapted for use in installations where it is desired to have the valve close automatically when a rupture occurs on the supply side of a high-pressure pipe system. The valve element for the check valve, which is adap... | 06/23/1981 |
| 4266568 | Vacuum breaker-pressure release device A vacuum breaker and pressure release valve for use with fuel storage tanks is disclosed which utilizes an intake check valve and an exhaust check valve to allow air to enter a tank from which fuel is being withdrawn by a pump while preventing air and vol... | 05/12/1981 |
| 4259984 | Valve construction A pressure and vacuum relief vent has the stem of each of its pressure and vacuum valves, which are urged to their closed positions by weight, slidably mounted in a bushing of Teflon in a metallic seat ring so that corrosive build up does not occur on the... | 04/07/1981 |
| 4080107 | Bellows pump and pumping plant for oil-filled electric cables A pump for pumping insulating oil for oil-filled electric cables in which a driven piston is within and spaced from a tubular bellows which is surrounded by an enclosure. The bellows forms a chamber with the enclosure which contains the cable oil, and the... | 03/21/1978 |
| 4026318 | Valve for giant tires A valve for giant tires comprises a tubular element and a valve member slidable within the tubular element for opening and closing the valve. The tubular element comprises a first section for connection to the valve stem of a tire, a second section formin... | 05/31/1977 |
| 4016900 | Springless valve for pneumatic tires and the like Valve member is supported by clips which slide along fitting as valve is opened or closed by air pressure. Radial openings in wall of fitting may be exposed for discharge by backing fitting off stem. Especially adapted for fast filling and discharge of ai... | 04/12/1977 |
