Class 251/181 - Plug

Subclass of Class 251 - Valves and valve actuation
Definition: Subject matter wherein the valve is a rotary plug.
No. of patents: 25
Last issue date: 05/08/2012

Number	Title	Issue Date
8172200	Flow control valve for fluidized material A flow control valve for fluidized material comprises a valve housing having a valve chamber with a valve seat and a valve plug having a flow passage, the valve plug being arranged inside the valve chamber in front of the valve seat (30) so as to be rotatable...	05/08/2012
7635113	Ball valve seat arrangement Ball valves that include a gland that is interposed between a spring and a seat. The ball valves include a valve body, a ball, a valve seat, and an annular spring. The spring urges the gland member toward the valve seat to urge the valve seat toward the ball. ...	12/22/2009
7314452	Self flushing luer activated blood sampling devices A blood sampling device for allowing a fluid pressure measurement and a fluid sample to be taken from a patient, having an inlet port configured to receive blood from the patient, an outlet port configured to be coupled to a monitoring channel having an infusion flu...	01/01/2008
7299824	Multiple-mode fluid valve A multi-position fuel valve includes a main body having an enclosed chamber with a number of inlet ports and an outlet port and associated seats in the chamber. Disposed inside the chamber is a revolving rotor that is connected to a selector handle located outside t...	11/27/2007
7210668	Valve assembly having a pressure balanced segment seal A plug valve assembly includes a plug and a segment seal assembly. The segment seal assembly is configured to reduce the differential pressure load across the segment seal assembly when the valve is closed. The segment seal includes an opening in fluid communication...	05/01/2007
6698718	Rotary valve A valve assembly including a main body defining a central axis and a gate. The gate includes a curved surface relative to the central axis and the gate is disposed within the main body. The gate is rotatable about an axis of rotation running along the len...	03/02/2004
6155298	Valve device for molten metal A valve device for a fluid such as molten metals, which permits reliable, accurate and very easy control of the flow of molten metal as well as the direction in which the molten metal is to flow. The valve device includes a valve body (6) and a valve seat...	12/05/2000
6082707	Valve seat and method Apparatus and methods are disclosed for a valve seat wherein the geometry of the seat is such that the resultant axial forces due to the differential between internal and external pressure across the valve seat result in a resultant axial force that urges...	07/04/2000
5947443	Plug valve A gas distribution valve including a body defining an inlet and an outlet passage, a central well containing a cylindrical plug disposed for arcuate displacement therein and including a transverse thru-bore that can be rotated into and out of axial alignm...	09/07/1999
5044606	Valve stem and packing assembly A valve stem and packing assembly is provided in which a rotatable valve stem includes a first tractrix surface for sliding contact with a stem packing and also includes a second tractrix surface for sliding contact with a bonnet. Force is applied by mean...	09/03/1991
4960060	Fertilizer injector An improved seal for a fertilizer injector, such as that shown in my prior U.S. Pat. No. 4,649,836, providing a rotating sealing carrier which prevents scoring by the constant rubbing of the plate carrying the injectors. The improved seal also provides th...	10/02/1990
4911413	Structure for fitting a valve seat support ring in a valve port In a valve in which a valve port is opened and closed by a spherical valve disc, a valve seat is pressed and supported by a support ring. A snap ring which engages with an annular groove around the support ring is inserted together with the support ring i...	03/27/1990
4878652	Plug valve An improved plug valve wherein a novel shape for the valve plug and valve chamber provide mating surfaces for improved wear characteristics. The novel shape of the valve plug is a frustum of a body of revolution of a curved known as a tractrix, a solid sh...	11/07/1989
4846223	Self-venting spool valve assembly A self-venting spool valve assembly includes a novel mechanism for retention of a rotatable spool within a longitudinally disposed valve body. The spool contains first and second flanges at opposed ends thereof, wherein the first flange is adapted to bear...	07/11/1989
4802652	Tapered ball valve A tapered plug valve having a body with a removable valve seat insert that can be replaced without removing the valve body from the operating site....	02/07/1989
4667927	Liquid flow metering device A device for metering the flow of a liquid medium passing therethrough comprises a plastic stem member having a cylindrical metering drum element projecting into and rotatively engaged in liquid tight relation with the cylindrical wall of a bore chamber i...	05/26/1987
4493337	Device on a valve for shutting off and/or controlling a flow of liquid Device on a valve for shutting and/or controlling a flow of liquid, consisting of a valve box with a chamber, to which is connected an inlet and an outlet and with a valve body in the form of a ball or cylinder so arranged as to be capable of displacement...	01/15/1985
4319664	Remotely controlled oil drain valve A remotely controlled oil drain valve device to be installed in the threaded drain plug opening of automotive crankcase permitting drainage of crankcase oil without removal of the crankcase plug. A cylindrical tapered valve core having cylindrical arms ex...	03/16/1982
4207923	Fluid valve A fluid valve with a valve body and core, the core being retained in the valve body by resilient fingers which extend from the body and snap past a lip on the valve core on insertion of the core into the body....	06/17/1980
4173234	Transfer valve A valve casing is provided with a part-spherical interior sealing surface and with three valve ports each open from the outside of the casing and through the part-spherical sealing surface thereof. A part-spherical valve body or ball is mounted in concent...	11/06/1979
4169578	Rotary valve with spring biased valve member An improved rotary valve comprising a valve body having a flow passage extending therethrough and a rotary valve stem journaled in said valve body transversely intersecting the flow passage. The valve stem includes at least one spring biased spherical val...	10/02/1979
4147327	Metallic seals for ball valve A ball or spherical plug valve has a pair of annular metallic seal rings mounted in grooves in the valve chamber around the inlet and outlet passageways of the valve body. Each metallic seal ring is of a one-piece generally uniform angled cross-section to...	04/03/1979
4072291	Rotary valve with spring biased valve member An improved rotary valve comprising a valve body having a flow passage extending therethrough and a rotary valve stem journaled in said valve body transversely intersecting the flow passage. The valve stem includes at least one spring biased spherical val...	02/07/1978
4050472	Fluid valve A fluid valve particularly suited for controlling the flow of coolant in an automobile heater system and a vacuum responsive servo for actuating the valve. The valve, two embodiments of which are disclosed, has improved sealing means and the servo include...	09/27/1977
4014512	Tamperproof plug valve A spring loaded, tamperproof plug valve such as a pressure gas stop has the rotatable valve plug resiliently retained against removal from the valve body by two stacked, slit, frustoconical, transversely arched spring washers that have teeth which make a ...	03/29/1977

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Class 251/181 - Plug