Patent ID: 8100794

Claim:
A power transmission chain comprising: a plurality of links each including front and rear insertion through holes through which pins are inserted to pass, and a plurality of first pins and a plurality of second pins which are arranged in a line for connecting together the links which are arranged in a chain width direction such that the front insertion through hole of one link is associated with the rear insertion through hole of another link, a longitudinal bending of the links being enabled through relative rolling contact movement of the first pins and the second pins, the pins used comprising different shapes to differentiate a biting timing of the pins into a pulley, wherein, at least one of the following combinations in the shapes of the pins is used of a relatively large rolling contact surface curvature and a relatively small rolling contact surface curvature, and a relatively inward offset and a relatively outward offset with respect to a radial direction of the chain, such that none of the pins of relatively small rolling contact surface is arranged contiguously, and none of the pins of relatively outward offset with respect to the radial direction of the chain is arranged contiguously.