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High pressure coupling apparatus

  • US 4,311,248 A
  • Filed: 12/29/1980
  • Issued: 01/19/1982
  • Est. Priority Date: 11/04/1974
  • Status: Expired due to Term
First Claim
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1. A coupling gasket member adapted to be located within a cavity of a pipe end coupler for connecting aligned pipe members carrying a pressurized fluid medium, comprising a base ring portion formed of solid flexible material and having a centrally located and integrally connected inner projecting member adapted to extend between said pipe members with said ring portion overlying the pipe members, said ring portion having an inner peripheral wall including a pair of small annular recesses one to each side of the projecting member, said projecting member extending outwardly from the inner peripheral wall and of said recesses, each of said recesses having a width at the peripheral wall on the order of the maximum width of the projecting member at the inner peripheral wall and a depth less than said width of said projecting member and substantially less than one half the depth of the ring portion and being located immediately adjacent to the projecting member, the axially outer sidewalls of the recesses being slightly inclined along substantially the total depth of the recesses to define a sealing lip at the inner peripheral wall surface deflected inwardly by the pipe member into a sealing position and maintaining said sealing lip spaced from said inner projecting member in the deflected sealing position by substantially the width of the recess with the lip deflected inwardly, said projecting member extending substantially beyond said peripheral wall in the non-sealing position and in the sealing position of the gasket.

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