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Method and apparatus for connecting pipes

  • US 9,523,447 B2
  • Filed: 08/28/2014
  • Issued: 12/20/2016
  • Est. Priority Date: 09/27/2013
  • Status: Active Grant
First Claim
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1. A method of joining an end of a first pipe and an end of a second pipe, the end of the first pipe having an outer annular end surface, the end of the second pipe having a pipe receiving opening, an interior abutment surface positioned spaced inwardly from the pipe receiving opening, and an interior end surface between the interior abutment surface and the pipe receiving opening, the method comprising:

  • (a) inserting the end of the first pipe into the end of the second pipe such that the outer annular end surface abuts the interior abutment surface, wherein a groove is positioned between the interior abutment surface and the pipe receiving opening, the groove comprising an open annular region between an outer surface of the first pipe and the interior end surface;

    (b) utilizing an injection passage that extends from an outer surface of the second pipe to an inner surface of the second pipe wherein the groove is in flow communication with an outlet end of injection passage to inject heated thermoplastic joining material into the groove; and

    (c) providing a blocking material that will become flowable when heated by the thermoplastic joining material that is infected into the groove and will flow out of the groove to the ambient as the heated pipe joining material is injected into the interstitial space.

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