Patent ID: 9074718
Filing Date: 2015-07-07
Classification: F16L

Abstract:
1. A method of making a cured-in-place pipe repair to a pipe having an area in need of repair, comprising: providing an elongated bladder tube having a first bladder tube end and a second bladder tube end; providing an elongated liner tube having a longitudinal direction connecting a first liner tube end and a second liner tube end and comprising at least one layer comprising strands of a substantially non-stretching material substantially parallel to the longitudinal direction of the liner tube, and a second layer comprising a resin-absorbent material; wherein the liner tube is substantially free of strands of substantially non-stretching material oriented ninety-degrees to the longitudinal direction of the liner tube to allow for radial expansion; wherein the non-stretching material comprises strands of glass, carbon fiber, or fiber glass oriented substantially parallel to the longitudinal direction of the liner tube; securing the liner tube within the bladder tube to form a liner assembly; impregnating the liner tube with a resinous material capable of curing and hardening; inverting the liner assembly through the pipe such that the liner tube covers the area in need of repair; allowing the resinous material to cure and harden; and removing the bladder tube to leave the liner tube cured in place at the area in need of repair.