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Class Information
Number: 137/464
Name: Fluid handling > Line condition change responsive valves > Safety cut-off requiring reset > Fluid counter-biased or unseated valve
Description: Apparatus in which the valve is urged or biased, as by gravity or a spring means, toward a closed or cut-off position and this bias is opposed by the fluid pressure within the apparatus, a lowering in the fluid pressure permitting the valve to seat or close, the arrangement being such that the valve does not return to open position on subsequent increase of fluid pressure.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 8307847 |
Ejector valve with glands |
Nov. 13, 2012 |
| 7216668 |
Interruption valve with automatic reset |
May. 15, 2007 |
| 7090144 |
Water fountain attachment for a faucet |
Aug. 15, 2006 |
| 6789566 |
Safety contrivance for gas-using device |
Sep. 14, 2004 |
| 5860446 |
Method and apparatus for safely controlling fluid flow |
Jan. 19, 1999 |
| 5289843 |
Hydraulic safety valve |
Mar. 1, 1994 |
| 5238020 |
Hydraulic valve |
Aug. 24, 1993 |
| 4469124 |
Gas shut-off valve |
Sep. 4, 1984 |
| 4461315 |
Pressure protection system |
Jul. 24, 1984 |
| 4446890 |
Continuity actuated isolation valve assembly |
May. 8, 1984 |
| 4413643 |
Hose-break valve |
Nov. 8, 1983 |
| 4352366 |
Velocity operated standing valve |
Oct. 5, 1982 |
| 4343327 |
Pressure responsive, manually opening valve |
Aug. 10, 1982 |
| 4173233 |
Pilot valve |
Nov. 6, 1979 |
| 4151863 |
Deflation device |
May. 1, 1979 |
| 4085772 |
Valve assembly |
Apr. 25, 1978 |
| 4080987 |
Hydraulic safety valve |
Mar. 28, 1978 |
| 3971404 |
Hydraulic runaway control valve |
Jul. 27, 1976 |
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