Tank lid

Details Tank lid Tank lid

1987-04-27

1988-04-12

Hall, George T.

Receptacles

Closures

With condition responsive vent or valve

B65D 5116

Patent

active

047368640

ABSTRACT:
A tank lid having flexible polymeric material forming an annular torus surrounding a discoid portion, pins retaining the torus seated on the upper edge of the tank. A proximity sensor which senses bulging of the discoid portion, the proximity sensor actuating a valve which will stop entry of gas such as nitrogen upon the disclosed portion bulging upwardly but allow entry of the gas when it deflects downwardly.

REFERENCES:
patent: 4116357 (1978-09-01), Stanley, Jr.

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