05467621 is referenced by 19 patents and cites 21 patents.

The closure includes a base adapted to be screwed into a fuel tank filler pipe and having a fill opening normally closed by a hinged flapper which is opened when a fuel nozzle is inserted into the fill opening. The base is shielded against being manually gripped and unscrewed from the filler pipe by a cover also having a fill opening and normally supported for free rotation on the base so that turning of the cover normally is ineffective to unscrew the base. When a key is inserted into the cover, it couples the cover and the base for rotation as a unit and thereby enables the base to be unscrewed from the filler pipe. The same key also is used to actuate a locking device for locking the flapper in its closed position.

Title
Lockable closure for a fuel tank filler pipe
Application Number
8/194499
Publication Number
5467621
Application Date
February 10, 1994
Publication Date
November 21, 1995
Inventor
Marc C Gravino
Rockford
IL, US
Agent
Leydig Voit & Mayer
Assignee
Trilby
IL, US
IPC
B65D 55/14
B65D 41/04
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