Gas cap assembly with retainer means

A tank cap assembly for closing the inlet of a tank comprising,

• a closure cap for releasable mounting on said tank inlet,
• an anchor chain,
• a retaining member mounted at the lower end of said chain for positioning in said tank, said retaining member normally having a width larger than the size of said tank inlet for resisting withdrawal therefrom,
• means for releasably connecting an upper end of said anchor chain to said cap,
• said connecting means comprising aperture means formed in said cap such that an upper end of said chain may be trained through said aperture means for releasable positive engagement therewith without auxiliary fastening means, and
• said aperture means comprising a pair of anchor chain retaining slots each having a relatively small sized aperture portion for receiving and positively retaining said anchor chain and a relatively large size aperture portion communicating with said small sized aperture portion for permitting free passage of said chain through said slots during assembly and disassembly of said chain in said cap.