Chain cover
AssigneeMasakazu Yamamoto
InventorEiji Yoshida
Life of this patent
Estimating the term…
Abstract
A chain cover is provided which can be mounted on a general-purpose roller chain, can be attached and detached to and from the chain, and will not impair bendability of the chain. Side covers for covering both sides of the chain extend from both ends of a top cover for covering a top of the chain. Each side cover has a shaft hole for receiving a coupling pin of the chain, a convex arcuate front edge that is concentric with the shaft hole, a concave arcuate rear edge opposed to the front edge, and a tapered guide surface. The top cover is supported directly by roller links of the chain to allow the coupling pin to be inserted not deeply into the shaft hole.
Claims18
A chain cover comprising:
- a top cover to cover a top portion of a roller chain, said top cover having a length that is substantially equal to a pitch of the roller chain and being constructed and arranged to be supported by roller links of the roller chain when the chain cover is mounted on the roller chain;
- and
- side covers for covering side portions of the roller chain, each of said side covers extending from a respective end of said top cover and having
- (i) a hole for receiving a coupling pin of the roller chain, said hole having a first end and a second end,
- (ii) a convex arcuate front edge that is concentric with said hole,
- (iii) a concave arcuate rear edge, and
- (iv) a guide portion beneath said hole, said guide portion having
- (a) an inner surface and an outer surface, with said inner surface being angled in a direction from said first end of said hole toward said outer surface,
- (b) a front end and a rear end, and
- (c) a bottom surface.
A combination of a chain cover and a roller chain, said roller chain having roller links and a coupling pin, said chain cover comprising:
- a top cover covering a top portion of said roller chain, said top cover having a length that is substantially equal to a pitch of said roller chain and being supported by said roller links;
- and
- side covers covering side portions of said roller chain, each of said side covers extending from a respective end of said top cover and having
- (i) a hole receiving said coupling pin, said hole having a first end and a second end,
- (ii) a convex arcuate front edge that is concentric with said hole,
- (iii) a concave arcuate rear edge, and
- (iv) a guide portion beneath said hole, said guide portion having
- (a) an inner surface and an outer surface, with said inner surface being angled in a direction from said first end of said hole toward said outer surface,
- (b) a front end and a rear end, and
- (c) a bottom surface.
Dependencies are inferred from the claim text.