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Class Information
Number: 137/462
Name: Fluid handling > Line condition change responsive valves > Safety cut-off requiring reset > Reset by pressure equalization valve or by-pass
Description: Apparatus in which the valve is reopened or reset by use of by-passes and/or valves which equalize the pressure on both sides of the main or cut-off valve, thereby permitting or causing the cut-off valve to open by fluid pressure alone.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8671971 Systems and methods for providing a monitoring and deactivation apparatus for a beverage distribution system Mar. 18, 2014
8534361 Multi-stage pressure equalization valve assembly for subterranean valves Sep. 17, 2013
7380293 Safety valve for toilet tank Jun. 3, 2008
7246634 Drill for tapping pipe with safety device in branch pipe Jul. 24, 2007
7231937 Automatic shutoff valve Jun. 19, 2007
7219688 Fluid control valve May. 22, 2007
7216668 Interruption valve with automatic reset May. 15, 2007
7178544 Combination shut-off and resetable excess flow valve Feb. 20, 2007
6920895 Combination surge supression and safety shut-off valve Jul. 26, 2005
6644345 Flow control valve Nov. 11, 2003
6443180 Hydraulic line adjustable velocity fuse with damping Sep. 3, 2002
6408870 Flow control valve Jun. 25, 2002
6123100 Ammonia excess flow valve Sep. 26, 2000
5960821 Flow sensor device and associated vacuum holding system Oct. 5, 1999
5791372 Relief valve Aug. 11, 1998
5752544 Device for feeding a distribution network with gaseous fluid May. 19, 1998
5524592 Anti-siphon and anti-leanout fuel valve Jun. 11, 1996
5474105 Overrun control device Dec. 12, 1995
5445184 Magnetic valve reset mechanism Aug. 29, 1995
5365965 Hydraulic automatic shutdown valve system Nov. 22, 1994
5295534 Pressure monitoring of a producing well Mar. 22, 1994
5241984 Flow valve Sep. 7, 1993
5238020 Hydraulic valve Aug. 24, 1993
5080181 Pressure detecting device for torque control wrench Jan. 14, 1992
4976281 Safety valve assembly for fluid system Dec. 11, 1990
4880030 Safety flow control fluid shutoff device Nov. 14, 1989
4665932 Automatic safety device for fluid duct May. 19, 1987
4637427 Magnetic valve Jan. 20, 1987
4605039 Runaway protective fuse valve Aug. 12, 1986
4597409 Safety device against overpressure particularly for gas pressure control apparatus Jul. 1, 1986
4590962 Gas fuse May. 27, 1986
4535797 Automatic shut off valve Aug. 20, 1985
4522229 Safety device for water-pipes Jun. 11, 1985
4471797 Hydraulic circuit breaker reset device Sep. 18, 1984
4471803 Flow limit shutoff valve Sep. 18, 1984
4465093 Hydraulic fuse valve Aug. 14, 1984
4463773 Safety shut-off valve Aug. 7, 1984
4347868 Relating to devices for the closure of fluid flow lines Sep. 7, 1982
4347867 Safety valve Sep. 7, 1982
4345593 Pressure-demand breathing apparatus with automatic air shut-off Aug. 24, 1982
4345592 Pressure demand regulator with automatic shut-off Aug. 24, 1982
4281790 Safety shower head Aug. 4, 1981
4201244 Auxiliary safety valve for a pressurized fluid system May. 6, 1980
4195658 Resettable safety valve Apr. 1, 1980
4188971 Fluid cutout valve Feb. 19, 1980
4167194 Automatic cutoff and tester apparatus of gas supply Sep. 11, 1979
4129141 Scram valve Dec. 12, 1978
4071038 Failsafe fluid control valve Jan. 31, 1978
4067359 Reset assembly for slam-shut valves Jan. 10, 1978
4010770 Velocity flow control valve for fluid line Mar. 8, 1977

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