Receptacles – Closures – Vent in closure
Patent
1989-02-17
1990-01-30
Pollard, Steven M.
Receptacles
Closures
Vent in closure
220203, 220DIG33, 215260, B65D 5100
Patent
active
048967890
ABSTRACT:
A vented fuel cap adapted to be removably attached to a filler neck of a fuel tank of the type commonly employed with small internal combustion engines is provided. The vented fuel cap comprises generally a generally cylindrical cap that is formed with inner threads, and is adapted to be threadedly engaged with the filler neck. A liner element is provided to fit within the cap, and is seated along the underside of the top of the cap. The liner element includes an axially inwardly-directed dome-shaped diaphragm portion that includes a slit formed substantially in its center. The cap and liner element allow for bi-directional venting of the fuel tank. The inwardly-directed dome-shaped diaphragm portion of the liner element allows outside air to vent into the fuel tank at a considerably smaller pressure differential than that required to vent outwardly from the interior of the tank.
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Hoffman John F.
Jeffers Albert L.
Pollard Steven M.
Tecumseh Products Company
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