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Slip on groove coupling with multiple sealing gasket

  • US 9,239,123 B2
  • Filed: 09/05/2013
  • Issued: 01/19/2016
  • Est. Priority Date: 06/30/2008
  • Status: Active Grant
First Claim
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1. A coupling for joining a first pipe and a second pipe, the coupling comprising:

  • an upper housing;

    a lower housing;

    at least one fastening device coupling the upper housing to the lower housing; and

    a gasket positioned within the upper and lower housings, the gasket includingtwo primary seals, each primary seal formed on an outer edge of the gasket and having a rounded interior end, the rounded interior end having a rounded portion facing radially inward, anda rib protruding from an inner surface of the gasket and between the two primary seals, the rib having a sealing surface defining a first axially outer edge, a second axially outer edge, and a cylindrical section facing radially inward, the cylindrical section being cylindrical when the at least one fastening device is in an untightened condition, the cylindrical section defined between the first axially outer edge and the second axially outer edge,the gasket adapted to slide over the first pipe end such that at least a portion of the first pipe extends axially beyond each edge of the gasket, a first primary seal of the two primary seals and the sealing surface of the rib contactable with an exterior surface of the first pipe when the first pipe and the second pipe are joined end-to-end; and

    a second primary seal of the two primary seals and the sealing surface of the rib contactable with an-exterior surface of the second pipe when the first pipe and the second pipe are joined end-to-end.

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