Roofing fastener
OwnerNorbert O. Kaiser, Eric W. Balinskiinventors
Life of this patent
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Abstract
A fastener for insulated roofing comprises a non-metallic, screw-threaded shank, having a penetrating point at one end of the shank and a transverse plate carried at the other end of the shank. The shank and transverse plate are preferably integrally method out of a polyetherimide resin formulation which has a tensile strength of at least 15,000 psi. as tested by ASTM D638. Such a fastener has a great advantage in terms of cost and lack of corrodability, while still exhibiting the required strength. Also, a universal driver socket is provided.
Claims15
A fastener for insulated roofing which comprises a nonmetallic, screw-threaded shank, a penetrating point at one end of said shank, and a transverse plate carried at the other end of said shank, said shank and transverse plate being integrally molded out of a polyetherimide resin formulation which has a tensile strength of at least 15,000 psi as tested by ASTM D638, in which the penetrating point of said nonmetallic, screw-threaded shank comprises a core of said resin formulation integral with the remainder of said shank, said core being coated with metal plating.
A fastener for insulated roofing which comprises a nonmetallic, screw-threaded shank, a penetrating point at one end of said shank, and a transverse plate carried at the other end of said shank, said shank and transverse plate being integrally molded out of a polyetherimide resin formulation which has a tensile strength of at least 15,000 psi as tested by ASTM D638, the screw threads of said shank having axially displaced portions defining step members that inhibit reverse rotation of said shank after screw advancement into an insulated roof.
Dependencies are inferred from the claim text.