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Class Information
Number: 137/329.04
Name: Fluid handling > With repair, tapping, assembly, or disassembly means > With provision of alternate wear parts > Valve heads and/or seats > Opposite duplicate surfaces of unitary structure > Homogeneous material > Valve heads
Description: Devices relating to valve heads.

Patents under this class:

Patent Number Title Of Patent Date Issued
8496224 Tunable valve assembly Jul. 30, 2013
6886586 Symmetrical valve configuration May. 3, 2005
6871668 Variable force actuator with a double needle poppet assembly Mar. 29, 2005
4967786 Armature for a solenoid operated valve Nov. 6, 1990
4936337 Armature for a solenoid operated valve Jun. 26, 1990
4872473 Dual float valve control for regular and douglas type valve Oct. 10, 1989
4716924 Valve assembly for reciprocating plunger pump Jan. 5, 1988
4641682 Valve with rotary valve head Feb. 10, 1987
4545399 Valve Oct. 8, 1985
4520842 High pressure valve for positive pressure pumps including means for installing and removing the valve Jun. 4, 1985
4483363 Compressor valve Nov. 20, 1984
4408629 Valve modification for fluid pump valves Oct. 11, 1983
4337920 Valve Jul. 6, 1982
4257442 Choke for controlling the flow of drilling mud Mar. 24, 1981
4190073 Choke for controlling the flow of drilling mud Feb. 26, 1980

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