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Miniature O-ringless gas line isolator

  • US 4,602,809 A
  • Filed: 11/21/1984
  • Issued: 07/29/1986
  • Est. Priority Date: 11/21/1984
  • Status: Expired due to Fees
First Claim
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1. A separable electrical isolator for releasably coupling together two pieces of conductive tubing carrying high pressure cryogenic gas, which comprises:

  • two pieces of tubing;

    a pair of complementary coupling members releasably secured together, each coupling member being rigidly attached to a corresponding one of the pieces of tubing to define an outwardly extending annular flange sealed about the periphery of the corresponding piece of tubing in a position slightly set back from an end of the piece;

    a pair of annular ribs, each one of the annular ribs protruding from a corresponding one of the annular flanges toward the end of the piece of tubing to which that annular flange is attached;

    a gas-impervious dielectric spacer between the coupling members, the spacer having a pair of opposing surfaces facing the annular ribs and a bore extending therebetween into which the tubing ends extend axially aligned without contacting each other; and

    means for releasably and nonconductively connecting the coupling members together to apply compressive force to the spacer with the annular ribs and thereby seal the tubing ends in fluid communication with an electrically nonconductive gap between them.

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