Vented fuel tank cap

Details Vented fuel tank cap Vented fuel tank cap

1993-01-29

1993-09-07

Shoap, Allan N.

Receptacles

Closures

With condition responsive vent or valve

220203, 220DIG33, 137 43, B65D 5116

Patent

active

052420728

ABSTRACT:
A cap for a fill pipe of a fluid container, such as a gas tank, is provided. It has a vent hole which is normally held unsealed by the weight of a ball which impinges against and thereby tilts a spring loaded pin carrying an O-ring. When the cap tips away from the vertical by more than a pre-selected angle, the ball rolls away from the pin and the spring urges the pin to an orientation where the O-ring seals the hole. When the container is tipped beyond the pre-selected angle, should the internal tank pressure exceed a pre-determined level, the pressure overcomes the force of the spring allowing relief venting.

REFERENCES:
patent: 1363263 (1920-12-01), Ohliger
patent: 2258019 (1941-10-01), Kramer
patent: 3389715 (1968-06-01), Hebard
patent: 3757987 (1973-09-01), Marshall
patent: 3918606 (1975-11-01), Keller
patent: 4685584 (1987-08-01), Harris

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