Patent ID: 9052051
Filing Date: 2015-06-09
Classification: F16L

Abstract:
1. An apparatus for internal repair of pipes and conduits comprising: a metal core coiled around a longitudinal axis adapted to be installed within a conduit at a repair site; a sealing structure surrounding said core, said sealing structure designed to prevent conduit-conveyed fluid from escaping from the conduit at the repair site, said sealing structure comprising: said metal core being structured and arranged to be moved from a coiled pre-installed configuration to an expanded, coiled, and sealed installed configuration; said core comprising pressure-equalizing open perforations extending through the metal core, said pressure-equalizing open perforations being structured and arranged to equalize internal pressure with an external pressure around said core during both (1) said movement from the pre-installed configuration to the installed configuration, and (2) after said movement, while in the installed configuration; said pressure-equalizing open perforations comprising a plurality of perforations extending along a majority of a circumference of the metal core.