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Safety release pipe cap

  • US 4,139,005 A
  • Filed: 09/01/1977
  • Issued: 02/13/1979
  • Est. Priority Date: 09/01/1977
  • Status: Expired due to Term
First Claim
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1. A thermal safety release pipe cap assembly which opens at a predetermined temperature comprising a ferrule of relatively low thermal conductivity material having a melting temperature above said predetermined temperature adapted to be fitted over the end of a pipe of relatively high thermal conductivity, said ferrule having an open portion coincident with the interior of the pipe and an interior wall embracing the pipe end;

  • a closure element for said open portion of said ferrule frictionally maintained within said ferrule, said element being of a material which melts at said predetermined temperature to expose the open portion of said ferrule to the pipe interior; and

    means for sealing securing said assembly to the pipe comprising an inwardly extending flange on said ferrule which overlays the end of the pipe and a peripheral wall of uniform thickness on said closure element having outer perimeter elements frictionally engaging the interior wall of said ferrule, said ferrule, when securred to the pipe, pressing said flange upon said peripheral wall to clamp said peripheral wall in intimate heat transfer relationship to the pipe between said flange and the end of the pipe.

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