초록 ▼

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

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.

대표청구항 ▼

A vented cap assembly for a fuel reservoir of the type having a filler neck and a fuel-receiving opening in the neck, said cap assembly comprising: a cap member including means for removably attaching the cap member to the filler neck of a fuel tank; a liner element engaging an underside of said cap

A vented cap assembly for a fuel reservoir of the type having a filler neck and a fuel-receiving opening in the neck, said cap assembly comprising: a cap member including means for removably attaching the cap member to the filler neck of a fuel tank; a liner element engaging an underside of said cap member and adapted to be disposed in the fuel-receiving opening when said cap assembly is attached to a filler neck, said liner element including a flexible generally dome-shaped diaphragm portion having a convex surface facing axially away from said underside of said cap member and a concave surface facing said underside of said cap member, said dome-shaped portion having a slit extending therethrough from the convex surface to the concave surface; and means associated with said cap member for venting gases to and from the underside of said cap member.