Safety shutoff valve

Details Safety shutoff valve Safety shutoff valve

1975-05-01

1976-06-15

Schwadron, Martin P.

Fluid handling

Liquid level responsive or maintaining systems

By float controlled valve

137404, 137421, 141198, F16K 3118

Patent

active

039630412

ABSTRACT:
A safety shutoff valve for fuel storage tanks and the like includes a housing with a float controlled valve member which closes in response to the rising liquid level in the tank to which the valve is attached. An elongated tubular member is attached to the valve outlet and projects an appreciable distance below the valve member that when the liquid level is high enough to close off the opening in the elongated member, a back pressure is developed within the elongated member and valve housing which causes the valve member to close and seat relatively gently under high pressure fill conditions. Special openings are provided in a baffle over the valve member to allow a portion of the incoming liquid to impinge upon the valve member to help urge it beyond the baffle whereupon it is driven to its closed position by the incoming liquid stream.

REFERENCES:
patent: 1267780 (1918-05-01), Lunde
patent: 1462253 (1923-07-01), Tobiasson
patent: 2299360 (1942-10-01), Tharp
patent: 2569110 (1951-09-01), McGillis et al.
patent: 3078867 (1963-02-01), McGillis et al.

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