Patent ID: 9377081
Filing Date: 2016-06-28
CPC Classification: F16G

Claim Text:
1. A chain for a continuously variable transmission wound around two pulleys, the two pulleys having conical surfaces facing each other, the distance therebetween being variable, wherein: the chain comprises a plurality of chain elements interconnected in an endless manner; the chain element has the chain elements adjacent to each other in the chain circumferential direction are interconnected by allowing a pin of one chain element to pass through the opening of the other chain element and vice versa, and when the chain bends, the contacting pins of the adjacent chain elements roll and contact; a relative action curve is defined as a relative shape of contact surfaces of the pins of the adjacent chain elements in a plane orthogonal to the width direction of the chain; the relative action curve has a shape which causes a contact point between the pins to move toward the outer side of the moving chain as an inter-adjacent element angle which is a relative angle between the adjacent chain elements becomes larger; and the relative action curve further has a shape which has a progressively increasing rate of an amount of movement of the contact point with increasing inter-adjacent element angle, the increasing rate being, compared to when the relative action curve has an involute shape, smaller when the inter-adjacent element angle is small and being larger when the inter-adjacent element angle becomes larger.