Two stage automatic shut off valve

Details Two stage automatic shut off valve Two stage automatic shut off valve

1990-06-06

1991-04-30

Walton, George L.

Fluid handling

Liquid level responsive or maintaining systems

By float controlled valve

137400, 137432, 137448, 137312, 141128, 141198, 2511499, 251212, F16K 3122, F16K 3300

Patent

active

050109154

ABSTRACT:
A shut off valve assembly for preventing overfilling of an underground fuel storage tank or other storage tanks where the incoming flow is not metered, utilizes a two stage valve closure, the first stage closure signaling the tank is nearly filled to capacity and the second stage closure subsequently completely stopping flow into the tank.

REFERENCES:
patent: 2299360 (1942-10-01), Tharp
patent: 2569110 (1951-09-01), McGillis et al.
patent: 2578926 (1951-12-01), Douglas
patent: 2773706 (1956-12-01), Leavell
patent: 3078867 (1963-02-01), McGillis et al.
patent: 3732902 (1973-05-01), Muller
patent: 3799502 (1974-03-01), Baum
patent: 3963041 (1976-06-01), McGillis
patent: 4266582 (1981-05-01), Sergent
patent: 4667711 (1987-05-01), Draft
patent: 4793387 (1988-12-01), LeBlanc et al.

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