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Class Information
Number: 137/533.15
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Reciprocating valves > Weight biased > Valve body is the weight > Ball valves > Separable seat
Description: Valves in which the valve seat is separable from the valve body.










Patents under this class:

Patent Number Title Of Patent Date Issued
8061381 Sucker rod pump with improved ball and seat Nov. 22, 2011
7976701 Drain trap Jul. 12, 2011
7955059 Fluid control device for a high pressure analytical instrument Jun. 7, 2011
7823601 Drain trap Nov. 2, 2010
7600532 Check valve having integrally formed seat and seal body Oct. 13, 2009
7237569 Ball check valve Jul. 3, 2007
7234480 Telescopic snap valve Jun. 26, 2007
7063516 One-way valve Jun. 20, 2006
6899127 Non-vibrating ball check valve May. 31, 2005
6510869 Ball check valve Jan. 28, 2003
6280166 Compressor having a valve mechanism of relatively high accuracy Aug. 28, 2001
6105610 Cartridge valve with triple sequential seal Aug. 22, 2000
6029685 Cage assembly for ball check valves Feb. 29, 2000
6007314 Downhole pump with standing valve assembly which guides the ball off-center Dec. 28, 1999
5799689 Tubular refrigerant check valve with idented outer housing portion Sep. 1, 1998
5797426 Check valve and trap assembly Aug. 25, 1998
5791374 Check valve for the pre-combustion chamber of an internal combustion engine Aug. 11, 1998
5785083 Tubular refrigerant check valve with snap-together internal valve cage structure Jul. 28, 1998
5749394 Check valve including molded valve seat May. 12, 1998
5662138 Drop head structure Sep. 2, 1997
5593292 Valve cage for a rod drawn positive displacement pump Jan. 14, 1997
5507312 Ball check valve Apr. 16, 1996
5474541 Valved nozzle for re-usable reservoir of a flowable product Dec. 12, 1995
5472326 Valve assemblies for sucker rod operated subsurface pumps Dec. 5, 1995
5370507 Reciprocating chemical pumps Dec. 6, 1994
5348454 Liquid pump resilient inlet insert for pumping high solids content liquids Sep. 20, 1994
5297580 High pressure ball and seat valve with soft seal Mar. 29, 1994
5232014 Check valve Aug. 3, 1993
5183068 Ball and seat valve Feb. 2, 1993
5178184 Pump valve apparatus Jan. 12, 1993
5012867 Well flow control system May. 7, 1991
4974628 Check valve cartridges with controlled pressure sealing Dec. 4, 1990
4945945 Check valve assembly for corrosive fluids Aug. 7, 1990
4781213 Ball check valve Nov. 1, 1988
4691735 Plunger valve apparatus for oil well pump Sep. 8, 1987
4667696 Flow valve May. 26, 1987
4513778 Check valve Apr. 30, 1985
4387736 Fluid control apparatus Jun. 14, 1983
4246002 Flash arrester Jan. 20, 1981
4243067 Ball type check valve Jan. 6, 1981
4162021 Pressure-vacuum relief fuel tank cap with roll-over safety valve feature Jul. 24, 1979
4155374 Internal check ball retainer May. 22, 1979
4108203 Check valve assembly Aug. 22, 1978
4069840 Ball check valve Jan. 24, 1978
4070237 Automatic vacuum stabilizing valve Jan. 24, 1978
4049015 Check valve assembly Sep. 20, 1977
3938692 Pressure-vacuum relief fuel tank cap with roll-over safety valve feature Feb. 17, 1976
3932898 Prosthetic heart valve separately formed cage Jan. 20, 1976











 
 
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