Patent ID: 7370676

Claim:
A sleeve for repairing a fluid pipe having a defective area where there is a reduction in the thickness of the pipe, said sleeve consisting of a rigid or flexible shell adapted to act as a mold to encase at least said defective area and in which can be injected or infused a liquid-state polymerizable material that is adapted to seal the defective area when it polymerizes, and an insert made up of a plurality of turns of a thread-like element wound in a spiral around said pipe at the location of said defective area prior to the injection or infusion of said polymerizable material, wherein a pitch between two adjacent turns of said insert is constant and small with respect to the width of said insert and defines a space between adjacent turns of said insert such that said polymerizable material can coat said turns and adhere to the surface of the pipe wall, and wherein said sleeve is adapted to form a hermetic seal enclosing all the turns of said thread-like element.