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Class Information
Number: 137/543.17
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Reciprocating valves > Spring biased > Spring coaxial with valve > Spring guides valve head
Description: Valves wherein the spring guides the head to its seat.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8640271 Cartridge unit and trap for sewer gas and odor containment Feb. 4, 2014
8499787 Pressure control valve Aug. 6, 2013
7921845 Muffler of linear compressor Apr. 12, 2011
7766036 Discharge valve and valve assembly of reciprocating compressor having the same Aug. 3, 2010
7721756 One-piece spring and poppet incorporated into a valve seat assembly and associated method for manufacturing a one-piece spring and poppet May. 25, 2010
7658405 Apparatus and method for providing extended inflator output Feb. 9, 2010
7640944 Valve for prevention of low flow rates through flow meter Jan. 5, 2010
7275561 Discharging valve assembly of reciprocating compressor Oct. 2, 2007
7270147 Adjustable variable flow fertilizer valve Sep. 18, 2007
7066722 Discharge valve for compressor Jun. 27, 2006
7056106 Discharge valve apparatus for reciprocating compressor Jun. 6, 2006
6994108 Check valve for fuel pump Feb. 7, 2006
6932109 Scavenger valve assembly Aug. 23, 2005
6874532 Valve for a fuel delivery unit Apr. 5, 2005
6814101 Excessive flow valve Nov. 9, 2004
6805154 Freeze protection device for wall hydrants/faucets Oct. 19, 2004
6786232 Check valve for a piston pump Sep. 7, 2004
6715471 Electric fuel pump Apr. 6, 2004
6640831 Valve for a fuel delivery unit Nov. 4, 2003
6537043 Compressor discharge valve having a contoured body with a uniform thickness Mar. 25, 2003
6532986 Freeze protection device for wall hydrants/faucets Mar. 18, 2003
6513546 Check valve Feb. 4, 2003
6443183 Valve and assembly for axially movable members Sep. 3, 2002
6284130 Filter cartridge with clean side anti-drainback valve Sep. 4, 2001
6250336 Water supply coupling with one-way valve for recreational vehicles Jun. 26, 2001
6187182 Filter cartridge assembly for a gas purging system Feb. 13, 2001
6135144 Pressure relief valve assembly Oct. 24, 2000
6044849 Fluid pressure relief valve with variable opening pressure Apr. 4, 2000
6039072 Safety valve arrangement Mar. 21, 2000
5993341 Hydraulic tensioner with a position actuated check valve assembly Nov. 30, 1999
5850851 Check valve and fuel tank utilizing the same Dec. 22, 1998
5848605 Check valve Dec. 15, 1998
5819794 Hydraulic tensioner with a contoured disc check valve Oct. 13, 1998
5800133 Compressor with discharge chamber relief valve Sep. 1, 1998
5755259 Safety shut-off for gas lines May. 26, 1998
5664602 Check valve for meter run Sep. 9, 1997
5588817 Pressure-medium-traversed piston of a reciprocating piston pump Dec. 31, 1996
5584314 Self-cleaning inlet head for a fluid Dec. 17, 1996
5577533 Flexured shaft poppet Nov. 26, 1996
5351707 Vibration-resistant impact valve for vapor recovery line Oct. 4, 1994
5349984 Check valve Sep. 27, 1994
5289842 Vibration-resistant impact valve for vapor recovery line Mar. 1, 1994
5241981 Self-tapping pressure relief valve Sep. 7, 1993
5135024 Roll over pressure relief valve Aug. 4, 1992
5123819 Pressure fluid pumping device with a reciprocating piston pump Jun. 23, 1992
4990247 Relief valve for liquid filter Feb. 5, 1991
4971181 Preloaded piston valving for hydraulic dampers and method of assembling the same Nov. 20, 1990
4964423 Check valve Oct. 23, 1990
4905729 Constant pressure type delivery valve for fuel injection pump Mar. 6, 1990
4889151 Snap action pressure relief valve with over pressure indicator Dec. 26, 1989

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