Patent ID: 7775030

Claim:
A power transmission chain comprising: a plurality of links, said links comprising a front inserting portion and a rear inserting portion, into which pins are to be inserted; and a plurality of first pins and second pins that are arranged in a front and in a rear, respectively, and connect the links arranged in a width direction of the power transmission chain so that the front inserting portion of one of the plurality of links corresponds to the rear inserting portion of another of the plurality of links, wherein the one of the plurality of links longitudinally pivots with respect to the another of the plurality of links through relative rolling-contact movement of the first and second pins, wherein ones of the first and second pins are fixed to the front inserting portions of the one of the plurality of links and movably inserted in the rear inserting portions of the another of the plurality of links, wherein other of the first and second pins are movably inserted in the front inserting portion of the one of the plurality of links and fixed to the rear inserting portion of the another of the plurality of links, wherein the power transmission chain has an endless loop shape, having an interior outer circumference and an exterior outer circumference, wherein a residual compressive stress in a portion of the link facing the interior outer circumference is larger than a residual compressive stress in a portion of the link facing the exterior outer circumference, and wherein the plurality of links are permanently deformed.