Patent ID: 6932116
Filing Date: 2005-08-23
Classification: F16L

Abstract:
1. A composite tubular liner suitable for the trenchless rehabilitation of existing conduits, comprising: an inner layer of a resin absorbent material joined at its edges to form a tube; an inner layer of a plurality of bundles of high modulus fibers disposed circumferentially on the outer surfaces of the inner resin absorbent material; at least one outer layer of resin absorbent material joined at its edges to form a tube about the inner layer of high modulus fibers: an outer layer of a plurality of bundles of high modulus fibers disposed circumferentially on the outer surfaces of the outer resin absorbent material an impermeable layer disposed about the outer layer of high modulus fibers; and the bundles of high modulus fibers aligned circumferentially on both sides of the at least one outer resin absorbent layer with the ends of the bundles overlapping so that upon installation and expansion of the tubular composite, the ends of the high modulus fibers slide past each other to allow for expansion to the wall of the existing conduit before the resin is cured.