Patent ID: 7708032
Filing Date: 2010-05-04
Classification: B29C,B29L,E03F

Abstract:
1. An apparatus for installing a sheet of pipe liner inside a man-entry sized pipe, comprising: a form having an exterior surface adapted to position the sheet of pipe liner adjacent the inner walls of the pipe wherein the sheet of pipe liner directly contacts the exterior surface of the form, wherein the exterior surface substantially conforms to the contours of the inner walls; an air cushion system that reduces the friction between the sheet of pipe liner and the exterior surface of the form, said air cushion system provides pressurized air in the space between the exterior surface of the form and the sheet of pipe liner in a manner such that the pressurized air lifts at least a portion of the sheet of pipe liner from the exterior surface of the form so as to reduce the amount of force needed to pull the sheet of liner across the exterior surface of the form.