Gas cap with automatic pressure compensation

Details Gas cap with automatic pressure compensation Gas cap with automatic pressure compensation

1976-09-01

1977-07-19

Price, William

Receptacles

Closures

Removable closure guided in rotary movement

220DIG32, 220316, 220231, 220367, 220204, B65D 5116, B65D 4500, B65D 8310

Patent

active

040363996

ABSTRACT:
A gas tank cap has an inner part connectable to a gas tank filler pipe and an outer part biased outwardly away from the inner part by a spring and normally freely rotatable relative to the inner part. One or more passages in the cap communicate with the filler pipe and with the ambient atmosphere and have valves interposed in them which are so positioned that when the outer part is pushed towards the inner part the valves are automatically opened to vent pressure from the gas tank. Only after the valves have opened in response to pushing of the outer part towards the inner part do the two parts become coupled for subsequent joint rotation so as to permit removal of the gas cap from the filler pipe.

REFERENCES:
patent: 2463516 (1949-03-01), Burkhardt
patent: 3809282 (1974-05-01), Blau et al.
patent: 3974936 (1976-08-01), Gerdes

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