Sealed chain for e.g. power transmission includes space formed betweeneach opposite end of bushing, outer surface of pin, and peripheral wall of bushing hole to partly receive O=ring

摘要

Each opposite end of the bushing (11), the outer surface of the pin (13), and the peripheral wall (12a) of the bushing hole (12c) defines a space leading to wide space (S) and which partly receives an O-ring. The wide space is formed between the inner and outer link plates (12,14).