Overfill spillage protection device

Claim 1

An overfill and spillage protection device for use in combination with an underground fuel storage tank having fill pipe means extending upwardly from said tank to an upper end located below ground level, said device comprising a hollow, tubular, bellows member symmetrical about a central vertical axis; said tubular bellows member being of a fuel impervious material of sufficient flexibility to accommodate axial extension and compression of said tubular bellows member, said member having an upper end, a lower end, an exterior surface and an internal chamber, means defining a relatively short, hollow, cylindrical section of said member extending downwardly from said upper end to a radially outwardly flared annular projection, said annular projection constituting the uppermost portion of a hollow bellows-shaped section of said tubular bellows member integral with and extending downwardly from said cylindrical section substantially to said lower end, a rigid annular rim member fixedly and sealingly secured to the upper end of said tubular bellows member in coaxial relationship to said central vertical axis, annular fill pipe coupling means fixedly and sealingly secured to said lower end in coaxial relationship to said central vertical axis, and a rigid, hollow, cylindrical skirt surrounding the exterior surface of said bellows-shaped section of said tubular member in axially overlapping relationship therewith, said rim member being adapted to be fixedly embedded in the ground at ground level and said coupling means being adapted to be fixedly and sealingly coupled to said upper end of said fill pipe means.