Method of making a bushing link chain
AssigneeFMC Corporation
InventorsJohn F. McKeon, Roy E. Lambert
Life of this patent
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Abstract
A blank, having a pair of parallel bushing forming strips that are intermediately connected by a web, is formed from stock. The blank is bent and curled in a progressive die to form a bushing link that includes a pair of cylindrical bushings integral with the web. Rollers can be slipped longitudinally over the bushing ends opposite from the web and an inside plate is welded to the bushing ends to form a roller link. Such roller links are alternately arranged with pin-links to form a roller chain. A bushing chain can be formed in essentially the same manner as the roller chain by omitting the rollers from the bushing links.
Claims5
In a method of making a chain, the steps of forming a blank that includes a pair of parallel bushing forming strips connected intermediately by a web, bending the web to position the strips perpendicular to the original plane of the web and parallel with each other, and curling each strip outwardly from the other strip to form a bushing link having a pair of bushings integral with the web that serves as an inside plate.
Dependencies are inferred from the claim text.