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Class Information
Number: 137/537
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Reciprocating valves > Spring biased > Spring under tension
Description: Valves in which the resilient member is placed under tension to hold the valve normally closed.










Patents under this class:

Patent Number Title Of Patent Date Issued
8608004 Sprayer tank cap with incorporated pressure relief valve Dec. 17, 2013
7721763 Adjustable pressure relief valve May. 25, 2010
7228870 Fuel saving valve assembly Jun. 12, 2007
6398183 Automatic shut-off device for a valve for compressed or liquefied gases Jun. 4, 2002
6257503 Dispenser head and receptacle fitted therewith Jul. 10, 2001
6227239 Spring-loaded safety valve May. 8, 2001
6044849 Fluid pressure relief valve with variable opening pressure Apr. 4, 2000
6039074 Pressure-induced shut-off valve for a liquid delivery system Mar. 21, 2000
5921271 Safety shut-off valve for high pressure bottles Jul. 13, 1999
5727594 Low actuation pressure unidirectional flow valve Mar. 17, 1998
5715996 Fuel injection nozzle Feb. 10, 1998
5671890 Fuel injection nozzle Sep. 30, 1997
5267979 Pressure responsive valve catheter Dec. 7, 1993
5242581 Shut-off valve Sep. 7, 1993
5161573 Pressure equalizing damper Nov. 10, 1992
5070845 Fuel injection nozzle Dec. 10, 1991
5049008 Air pulse discharge control valve for fluidizing dry particulate material Sep. 17, 1991
4846217 Injection valve Jul. 11, 1989
4827972 Priority flow control valve May. 9, 1989
4827975 Valve May. 9, 1989
4681139 Elastomer ball check valve Jul. 21, 1987
4631923 Solenoid operated check valve Dec. 30, 1986
4612962 Spring-loaded valve Sep. 23, 1986
4543990 Irrigation valve Oct. 1, 1985
4375825 Integral valve apparatus Mar. 8, 1983
4286664 Positive seal float collar Sep. 1, 1981
4209485 Method of making a valve apparatus Jun. 24, 1980
4195656 Orifice device with safety shut-off for pressure regulators Apr. 1, 1980
4157281 Method and apparatus for reclaiming solvents from solvent-bearing sludge material Jun. 5, 1979











 
 
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