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Class Information
Number: 137/246.22
Name: Fluid handling > With cleaner, lubrication added to fluid or liquid sealing at valve interface > Liquid supplied at valve interface > External pressure
Description: Valves wherein the sealing material is introduced into the valve under pressure from some means such as a grease gun or oil pump.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8616233 Rotary face seal with anti-crowning features Dec. 31, 2013
8127795 Flue gas diverter damper seal land Mar. 6, 2012
7007711 Dispersion nozzle with variable throughput Mar. 7, 2006
6698444 Freeing of seized valves Mar. 2, 2004
6675825 Lubricated plug valve Jan. 13, 2004
6065736 Ball valve having a non-integral upstream seat and at least one integral downstream seat May. 23, 2000
6016829 Check valve having function of adjusting flow rate of fluid Jan. 25, 2000
5971007 Piston valve Oct. 26, 1999
5706851 Plug valve Jan. 13, 1998
5520209 Fluid relief device May. 28, 1996
5465748 Sanitizable slider diaphragm valve Nov. 14, 1995
5341835 Lubrication system for valve seat of a gate valve Aug. 30, 1994
5327928 Air seal valve Jul. 12, 1994
5287879 Hydraulically energized wireline blowout preventer Feb. 22, 1994
5178363 Valve stem sealing means for prevention of fugitive emissions Jan. 12, 1993
5159954 Hinged safety-valve for large ducts Nov. 3, 1992
5129624 Valve stem sealing means for prevention of fugitive emissions Jul. 14, 1992
5000422 Incinerator valve Mar. 19, 1991
4899775 Corrosion-resistant overlay for the edge of butterfly valves Feb. 13, 1990
4892289 Letdown valves Jan. 9, 1990
4749002 Shut-off device in the form of a ball valve Jun. 7, 1988
4702269 By-pass valve Oct. 27, 1987
4671915 Method for making a glass precision valve Jun. 9, 1987
4664140 Reversing valve May. 12, 1987
4658853 Anti-leak valving system Apr. 21, 1987
4635674 Diverter valve assembly and method Jan. 13, 1987
4601307 Lubricated plug valve Jul. 22, 1986
4583569 Wireline blowout preventer Apr. 22, 1986
4565305 Rotary vane valve Jan. 21, 1986
4531537 Plug valve for reduced leakage Jul. 30, 1985
4519414 Mechanically balanced tapered plug valve May. 28, 1985
4506696 Gas tight plug valve Mar. 26, 1985
4501286 Rotary valve Feb. 26, 1985
4499919 Valve Feb. 19, 1985
4498498 Double valve assembly Feb. 12, 1985
4493349 Liquid filling machine Jan. 15, 1985
RE31471 Multiple blade damper assembly Dec. 27, 1983
4405113 Reciprocating expandable gate valve Sep. 20, 1983
4372338 High pressure valve assembly Feb. 8, 1983
4335738 Butterfly valve Jun. 22, 1982
4318422 Butterfly valve Mar. 9, 1982
4290578 Failsafe cutoff valve for oil and gas wells Sep. 22, 1981
4286614 High temperature ball valve Sep. 1, 1981
4262690 High pressure stem packing for gate valves Apr. 21, 1981
4257574 Spherical valve seal Mar. 24, 1981
4254793 Ball valve having valve chamber venting seal assemblies Mar. 10, 1981
4249679 Sealing closure for asphalt mix storage bin outlet Feb. 10, 1981
4231440 Rotary, segmented, expansible valves Nov. 4, 1980
4227543 Blowout preventer Oct. 14, 1980
4226258 Ball valve Oct. 7, 1980

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