Patent ID: 7112254
Filing Date: 2006-09-26
Classification: B29C,F16L

Abstract:
1. A method for installing a resin impregnated cured in place liner having inner and outer resin impermeable coatings into an existing underground conduit from an installation access opening to a receiving access opening, comprising: providing a length of liner suitable for the length of conduit to be repaired; pulling the liner into the conduit from the receiving access opening towards the installation access opening to a predetermined distance from the end of the conduit at the installation access opening; providing a receiving canister having an open installation end and a receiving end with a fluid outlet coupling; installing the open end of the receiving canister into the trailing end of the liner; continuing to pull the liner into the installation access opening so that the leading end of the liner is disposed in the installation access opening and the receiving canister is positioned at the end of the conduit at the receiving access opening; connecting an inlet fluid supply line into the leading end of the liner in the installation access opening; installing an exhaust line on the fluid outlet on the receiving canister; feeding fluid into the liner to expand the liner against the wall of the conduit and pass through the liner and exit the exhaust line at the receiving access opening; feeding heated fluid through the liner until the resin in the liner is cured; cease feeding curing fluid; and allowing the liner to cool.