Resettable automatic shut-off valve

Details Resettable automatic shut-off valve Resettable automatic shut-off valve

1993-03-25

1993-11-30

Schwadron, Martin P.

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

137377, F16K 1728

Patent

active

052656411

ABSTRACT:
A valve adapted to be disposed in a conduit for a flowing substance which may be a liquid or gas comprises a lower valve housing for allowing fluid under pressure to enter the valve. As flow under pressure enters the valve body it forces a float ball to float inside the valve body. When a rupture in the conduit occurs and allows the flowing substance to exceed the normal amount of pressure, the float ball rises to and engages an upper valve housing ball seat where the float ball sits thereby sealing and shutting off the valve from escape of the flowing substance. When the problem has been rectified, the valve can be reactivated by removing a lock member and simply pressing a reset button.

REFERENCES:
patent: 1159518 (1915-11-01), Maul
patent: 2426510 (1947-08-01), Kelly
patent: 2949748 (1960-08-01), Gangi
patent: 3055391 (1962-09-01), Shuk et al.
patent: 3407827 (1968-10-01), Follett
patent: 3941145 (1976-03-01), Morain et al.
patent: 4071038 (1978-01-01), Robinson
patent: 4257448 (1981-03-01), Shiu et al.
patent: 4889150 (1989-12-01), Lloyd et al.

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