Importance

Loading Importance Indicators...

Abstract

A fuel cap has an upper housing and a lower housing, each configured to be inserted into the filler neck of a vehicle fuel system. The upper housing and lower housing are cooperatively configured to allow both rotational and axial relative movement with respect to one another. A seal coupled to the lower housing sealingly engages the filler neck when the fuel cap is in a tightened position. A spring mount is coupled to the lower housing and engages a spring that is positioned to bias the lower housing axially toward the upper housing to assist in loosening contact of the seal and filler neck during removal of the fuel cap. The fuel cap further has a drive axially spacing the upper housing from the lower housing as the upper housing rotates relative to the lower housing. A cam and cam follower connection between the upper and lower housing provides the drive. At least one lug extends from the lower housing to engage a respective notch formed on the interior surface of the filler neck and the lugs and notch cooperate to prevent rotation of the lower housing relative to the filler neck when the cap is in the tightened position.

Loading the Abstract Image...

First Claim