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Clamp-welded pipe joint

  • US 4,131,302 A
  • Filed: 09/01/1977
  • Issued: 12/26/1978
  • Est. Priority Date: 06/14/1976
  • Status: Expired due to Term
First Claim
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1. A pipe joint comprising:

  • first and second pipe segments having male frustoconical skirts extending outwardly around the periphery of confronting portions of said pipe segments;

    said frustoconical skirts having mutually opposed machined and mated surfaces;

    said frustoconical skirts when mated defining angularly inclined sidewalls sloping from a broad cross section radially adjacent said pipe segments to a narrow cross section radially remote from said pipe segments;

    said skirts uniformly compressed towards each other such that said mated surfaces are in intimate contact;

    each of said skirts having an annular groove adjacent confronting portions of said periphery, thereby defining a mating ridge for receiving a seal weld;

    a seal weld sealably fusing said first and second pipe segments along said mating ridge defined by said uniformly compressed skirts; and

    a collet having a plurality of circumscribing segments extending around said skirts with a female frustoconical channel mating said male frustoconical skirts, said female frustoconical channel defining two opposed angularly inclined sidewalls sloping from defining a broad cross section of said channel radially adjacent said pipe segments to a narrow cross section radially remote from said pipe segments, said collet including means for circumferentially compressing said collet onto said juxtaposed skirts, thereby axially compressing said first and second pipe segments, for providing the mechanical strength of said pipe joint and for maintaining each of said skirts uniformly compressed with said seal weld extending across said ridge.

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