Apparatus for repairing a pipeline and method for using same

  • US 6,105,619 A
  • Filed: 04/26/1999
  • Issued: 08/22/2000
  • Est. Priority Date: 08/19/1994
  • Status: Expired due to Term
First Claim
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1. A method for repairing the junction between a lateral sewer pipe and a main sewer pipe, said method comprising:

  • taking a preliner tube having first and second ends and being sized to fit within said lateral sewer pipe, said preliner tube having an open cell gasket extending around the exterior surface of said second end thereof;

    impregnating said open cell gasket with an uncured grout;

    inserting said preliner tube into said lateral sewer pipe to a position wherein said open cell gasket impregnated with said grout is at said juncture and forms a watertight seal between said preliner tube and said main sewer pipe and said lateral sewer pipe;

    inserting a flexible sleeve inside said preliner tube, said sleeve being impregnated with uncured resin;

    using fluid pressure from inside said sleeve to force said sleeve radially outwardly against said preliner until said uncured resin cures and hardens.

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