Patent ID: 8038559
Filing Date: 2011-10-18
Classification: F16G,F16H

Abstract:
1. A power transmission chain comprising: a plurality of links arranged in a chain advancing direction; and a plurality of connecting members arranged in a chain width direction perpendicular to the chain advancing direction for connecting the links in a mutually bendable manner, wherein said connecting members include a plurality of power transmission members comprising end faces engaging in a power transmittable manner with sheave faces of pulleys, wherein said end faces include bulging curved faces comprising a first end portion and a second end portion with respect to perpendicular directions perpendicular to the chain advancing direction and the chain width direction, wherein said bulging curved faces are formed in a half ovate spheroid shape, when viewed along the chain width direction, and maximum width portions of the bulging curved faces with respect to the chain advancing direction and the first end portions are relatively distant, and the maximum width portions and the second end portions are relatively near, wherein said first end portions correspond to a plurality of outer sides of a plurality of pulley radial directions, wherein a line of intersection between an arbitrary plane containing a predetermined reference axis and said bulging curved faces comprises an arcuate shape comprising a single radius of curvature on said arbitrary plane, wherein said predetermined reference axis is arranged close to the first end portions and outside of the connecting members and extends in the chain width direction, wherein an intersection line between an arbitrary arcuate plane on a center of the radius of curvature of the reference axis and an end face of the end faces is formed into an arcuate shape comprising a single radius of curvature in the arbitrary arcuate plane, wherein the radius of curvature of the intersection line becomes larger as the arcuate plane constituting the intersection line moves from one end portion of the perpendicular directions toward the center of the maximum width portion, and wherein the radius of curvature of the intersection line becomes smaller as the cylindrical plane constituting the intersection line moves from the center toward another end portion of the perpendicular directions.