Patent ID: 7628943
Filing Date: 2009-12-08
Classification: B29C,F16L

Abstract:
1. An in situ pipe repair method using a thermally responsive repair material carried and detached from a flexible and electrically heatable bladder that is inverted and wound on a rotatable spindle within a fluid sealable container comprising: a. placing a thermally responsive repair material on an exterior surface of an extended flexible, fluid inflatable and electrically heatable bladder having a closed first end and an open second end; b. fluid sealably attaching the second open bladder end to a first opening of a fluid sealable container having an interior annulus; c. inverting the bladder with the repair material and retracting the bladder through the first opening and winding the inverted bladder onto a rotatable spindle within the container annulus; d. placing the container annulus into controllable fluid communication with a fluid source; e. placing the heatable bladder into electrical communication with an electrical power source; f. placing the first container opening proximate to a pipe opening; g. adding fluid into the annulus whereby the fluid pressure is increased and the bladder with the repair material begins to evert from the first container opening and unwind from the spindle and extend into the pipe opening; h. continuing the addition of fluid until the repair material reaches a desired location within the pipe and then energizing the electrical heating component of the bladder to cure the repair material; i. de-energizing the heating component and removing fluid from the container and bladder; j. removing the bladder from the pipe.