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Class Information
Number: 137/315.28
Name: Fluid handling > With repair, tapping, assembly, or disassembly means > Assembling or disassembling reciprocating valve > Having particularly packed or sealed mechanical movement actuator
Description:










Patents under this class:

Patent Number Title Of Patent Date Issued
8613423 Methods and apparatus to load a valve packing Dec. 24, 2013
8453676 Fugitive emission reducing valve arrangement Jun. 4, 2013
7980530 Packing nut for control valve Jul. 19, 2011
7472716 Valve packing removal device Jan. 6, 2009
6488263 Valve stem and method of manufacture; improved stem packing Dec. 3, 2002
6250604 Valve stem and method of manufacturing, improved stem packing Jun. 26, 2001
6247679 Valve stem and method of manufacture; improved stem packing Jun. 19, 2001
6167902 Bottom entry cryogenic valve Jan. 2, 2001
6050541 Pneumatic valve actuator assembly Apr. 18, 2000
5829473 Multi purpose valve Nov. 3, 1998
5775370 Fluid pressure control valve apparatus Jul. 7, 1998
5743288 Valve having provision for replacing stem packing while the valve is under pressure Apr. 28, 1998
5732731 Secondary seal bypass valve for gate valves Mar. 31, 1998
5503180 Valve having easily replaceable seat Apr. 2, 1996
5456447 Valve assembly Oct. 10, 1995
5312087 Low torque back seating stem for gate valve May. 17, 1994
5146945 Seal ring retainer and guide ring for valve plug Sep. 15, 1992
5107882 Valve assembly with removable packing Apr. 28, 1992
4934403 Readily inspectable and cleanable emergency valve for storage tank Jun. 19, 1990
4926898 Safety choke valve May. 22, 1990
4867197 High pressure valve Sep. 19, 1989
4860784 Non-rising stem valve assembly and method of replacing a permanent seal Aug. 29, 1989
4773442 Globe valve having a dismountable seat for rapid maintenance Sep. 27, 1988
4705062 Choke and improved needle tip therefor Nov. 10, 1987
4640305 High temperature, zero leakage packing assembly Feb. 3, 1987
4633898 Slide valve with partial-vacuum actuator Jan. 6, 1987
4630636 Actuator with nonelastomeric seal Dec. 23, 1986
4513770 Flow control valve Apr. 30, 1985
4509719 Valve cover sealing Apr. 9, 1985
4503878 Choke valve Mar. 12, 1985
4474203 Valve with pressure energized back seat sealing means Oct. 2, 1984
4470430 Drilling choke Sep. 11, 1984
4450856 Means for releasably securing hand-wheel to valve spindle May. 29, 1984
4444220 High pressure valve Apr. 24, 1984
4408627 Exhaust brake valve unit Oct. 11, 1983
4394872 Valve assembly for packing removal Jul. 26, 1983
4363466 Replacement valve assembly Dec. 14, 1982
4351512 Valve with yoke and captive gland wrench Sep. 28, 1982
4274432 Valve Jun. 23, 1981
4230299 Pressure balanced gate valve having selective actuator systems Oct. 28, 1980
4149558 Selective back seat valve Apr. 17, 1979
4149699 Union bonnet valve Apr. 17, 1979
4135546 Stem packing assembly for gate valves and means for removal Jan. 23, 1979











 
 
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