Receptacles – Closures – With condition responsive vent or valve
Patent
1986-09-29
1987-08-11
Hall, George T.
Receptacles
Closures
With condition responsive vent or valve
220DIG33, 137 39, 137 43, 137 73, B65D 5116
Patent
active
046855840
ABSTRACT:
A fuel cap for closing the filler neck of an off-road vehicle. The fuel cap includes a cover having an opening therethrough and a concentric housing extending downwardly into the filler neck and connected to the cover. A valve body having an upper and a lower chamber disposed therein is fitted into the housing and extends downwardly into the filler neck. The upper chamber and lower chamber have vent openings which cooperate with the opening in the cover to provide a vent path to allow the fuel tank to vent fuel vapor to the atmosphere. The lower chamber includes a floatation ball to seal one of the vent openings in the lower chamber to prevent fuel spillage when the vehicle is subjected to a bump, or is operated on a grade. The upper chamber includes a steel ball which seals one of the vent openings in the upper chamber to prevent fuel spillage when the vehicle is overturned to a substantially vertical position. Interposed between the upper and lower chambers is an upwardly biased plunger which, because of cooperation with the steel ball, extends into the lower chamber to prevent the floatation ball from sealing the vent opening in the lower chamber when the vehicle is in an upright position, and is operated normally. When the vehicle is subjected to a bump, or is operated on a grade, the steel ball rolls off of the upwardly biased plunger which allows the floatation ball to seal the vent opening in the lower chamber to prevent fuel spillage.
REFERENCES:
patent: 3757987 (1973-09-01), Marshall
patent: 4337873 (1982-07-01), Johnson
patent: 4494673 (1985-01-01), Hiraishi
patent: 4512499 (1985-04-01), Uvskallio
Hall George T.
Stant Inc.
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