Patent ID: 9494213
Filing Date: 2016-11-15
CPC Classification: F16G

Claim Text:
1. A chain comprising: a plurality of first links; a plurality of second links; and a plurality of pins, the first link including a pair of holding plates, the second link including one or more inner plates disposed between the pair of holding plates in a width direction, the first link and the second link adjacent to each other in a longitudinal direction being coupled together in a bendable manner via the single pin movably inserted into a pin hole in the inner plate and held in a state where rotational movement of the pin is regulated by the pair of holding plates, the chain being wound around one or more rotary wheels, wherein a hole peripheral wall surface of the inner plate forming the pin hole has a plate rolling surface which is a protruding curved surface toward a center of the pin hole, an outer peripheral surface of the pin has a pin rolling surface which is a protruding curved surface, and the plate rolling surface rolls on the pin rolling surface during chain bending in which the second link bends relative to the first link.