초록 ▼

A pressure-vacuum relief fuel filler cap comprising a cover, having a base and a peripheral flange, and a sub-assembly mounted at least partially within the cover with said peripheral flange surrounding a portion of the sub-assembly. The assembly comprises a body of synthetic plastic material includ

A pressure-vacuum relief fuel filler cap comprising a cover, having a base and a peripheral flange, and a sub-assembly mounted at least partially within the cover with said peripheral flange surrounding a portion of the sub-assembly. The assembly comprises a body of synthetic plastic material including an outer threaded end adapted to engage a threaded filler opening, and an enlarged upper end with portions thereof engaging the base of the cover. A pressure relief valve and associated valve seat are mounted within the body and a vacuum relief valve and associated valve seat are mounted within the body. Torque limiting means are provided between the body and the cover for limiting the torque applied to the body during application to a filler opening, so that when a predetermined torque is reached, the cover can be rotated relative to the body and when the cap is rotated in the opposite direction, there can be no relative movement between the cover and the body.

대표청구항 ▼

A pressure-vacuum relief fuel filler cap comprising a cover, said cover comprising a base and a peripheral flange, a body of synthetic plastic material mounted at least partially within said cover with said peripheral flange surrounding a portion of said body, said body including an outer threaded e

A pressure-vacuum relief fuel filler cap comprising a cover, said cover comprising a base and a peripheral flange, a body of synthetic plastic material mounted at least partially within said cover with said peripheral flange surrounding a portion of said body, said body including an outer threaded end adapted to engage a threaded filler opening, said body having the other end thereof opposite said threaded end thereof engaging the base of said cover, a pressure relief valve and associated valve seat within said body, a vacuum relief valve and associated valve seat within said body, and torQue limiting means between said body and said cover for limiting the torque applied to said cover during application to a filler opening, said torque limiting means comprising a plurality of circumferentially spaced radially inwardly extending portions on the inner surface of said peripheral flange of said cover, and a plurality of integral radially yieldable teeth on the periphery of said body adjacent said portions on said cover, said teeth including a ramp surface and a notch surface such that when the cover is rotated in one direction in applying the cap to a filler opening and a predetermined torque is reached, the cover can be rotated relative to said body with said radially inwardly extending portions moving along said ramp surfaces to succeeding notches, and when the cap is rotated in the opposite direction, said radially inwardly extending portions on the cover are engaged with the notches so that there can be no relative movement between the cover and the body, said body including radially extending circumferentially spaced integral projections extending outwardly into contact with the inner surface of the peripheral flange of the cover.