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Class Information
Number: 137/463
Name: Fluid handling > Line condition change responsive valves > Safety cut-off requiring reset > Fluid released trip
Description: Apparatus in which the valve is biased toward the closed or cut-off condition but is restrained from closing by a latch or similar means, which latch will release the valve for closing in response to a change in fluid condition within the apparatus.










Patents under this class:

Patent Number Title Of Patent Date Issued
8678026 Automatic increased-suction relief apparatus Mar. 25, 2014
8640729 Method and apparatus for automatic fluid shut-off Feb. 4, 2014
8474480 Actuator control valve Jul. 2, 2013
8453658 Pressure progressing spray fitting apparatus Jun. 4, 2013
8225812 Slam shut safety device Jul. 24, 2012
7987870 Overpressure protection device and connection subassembly comprising same Aug. 2, 2011
7219687 Resettable bi-stable thermal valve May. 22, 2007
7028705 High torque failsafe valve operator Apr. 18, 2006
6651686 Valve actuator system Nov. 25, 2003
6401741 Excess flow shut-off valve Jun. 11, 2002
6152167 Valve actuator with emergency shutdown feature Nov. 28, 2000
6148788 Valve for liquids Nov. 21, 2000
5967177 Pressure regulating valve Oct. 19, 1999
5261446 Self-contained emergency shutdown valve Nov. 16, 1993
5240034 Safety and automatic stop device, in particular for gas expansion stations Aug. 31, 1993
5048791 Shut off valve Sep. 17, 1991
4913200 Liquid dispensing nozzle with a pump pressure responsive automatic shut-off mechanism Apr. 3, 1990
4768539 Pipeline safety valve Sep. 6, 1988
4708163 Safety valve Nov. 24, 1987
4665945 Pressure regulator for a fuel gas May. 19, 1987
4665932 Automatic safety device for fluid duct May. 19, 1987
4572255 Liquid dispensing nozzle with a pump pressure responsive automatic shut-off mechanism Feb. 25, 1986
4523602 Pressure controller Jun. 18, 1985
4503883 Gas pressure regulator with under and over shut-off Mar. 12, 1985
4457334 Pressure sensitive valve actuator Jul. 3, 1984
4378818 Well drilling float valve Apr. 5, 1983
4192344 Automatic emergency stop apparatus against counter flow and counter fire of gas bodies Mar. 11, 1980
4173986 Pressurized gas flow control valve and assembly thereof with reducer regulator Nov. 13, 1979
4161960 High and low tubing pressure actuated well safety valve Jul. 24, 1979
4067359 Reset assembly for slam-shut valves Jan. 10, 1978
4033374 Latch assembly for slam-shut valves Jul. 5, 1977
3971403 Safety valve Jul. 27, 1976
3965927 Overrun valve for air pumps Jun. 29, 1976











 
 
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