Patent Number: 7,914,409

Title: Oil-free chain

Abstract: In an oil-free roller chain, the inner faces of the outer link plates have recesses that receive the ends of bushings, and the inner faces of the inner link plates have recesses that receive the ends of rollers surrounding the bushings. Each such recess is formed by punching, so that the outer surface of each plate has a bulged portion opposite each recess. The diameters of the bulged portions are greater than the diameters of the corresponding recesses. The bushing can have an oil passage located midway between its ends and serving as an oil reservoir supplying oil to the gap between the bushing and the roller and between the bushing and a connecting pin.

Inventors: Aoki; Toshihiko (Osaka, JP), Ishida; Hiroki (Osaka, JP), Nakagawa; Takashi (Osaka, JP)

Assignee: Tsubakimoto Chain Co.

International Classification: F16G 13/04 (20060101)

Expiration Date: 2019-03-29 0:00:00