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Flexible pipe coupling

  • US 4,616,858 A
  • Filed: 10/24/1984
  • Issued: 10/14/1986
  • Est. Priority Date: 10/28/1983
  • Status: Expired due to Term
First Claim
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1. A coupling for the establishment of a fluidtight connection between the neighboring end portions of two pipes, comprising a deformable elastic sleeve having two open ends, an external surface, an internal surface, a substantially centrally located annular partition extending from said internal surface and disposed between the end portions of the pipes which are inserted into the sleeve through the respective open ends, two inner circumferential grooves provided in said internal surface at the opposite sides of said partition, and a third circumferential groove provided in said external surface;

  • and a clamping unit including a split ring surrounding said external surface and having a first corrugation extending into said third groove, said ring further having two outwardly extending projections which are relatively movable between a first position in which said projections are separated by a first distance as considered circumferentially of said ring and a second position in which said projections are separated by a smaller second distance as considered circumferentially of said ring, and said clamping unit further having tightening means for drawing said projections from said first position to said second position to thereby tighten said ring around the external surface of and deform said sleeve, said clamping unit also including an arcuate insert which bridges at least the major part of the gap between said projections in said first position and is at least partially disposed between said ring and the external surface of said sleeve in said second position, and said insert having a second corrugation extending into said third groove and receiving the adjacent portion of the first corrugation in said second position.

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