# US 5,342,252 A · Toothed belt

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- Number: US 5,342,252 A
- Document ID: US5342252A
- Status: Granted
- Kind: A
- Application number: 08/132,387
- Filed: 1993-10-06
- Granted: 1994-08-30
- Earliest claimed: 1992-10-13
- Assignees: Tsubakimoto Chain Co.
- Inventors: Toru Fujiwara; Yoshinori Itoh
- Web page: https://patentgrep.com/patent/US5342252A

## CPC

- F16G 1/28: with a contact surface of special shape, e.g. toothed
- F16G: BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR

## Abstract

Resistance to tooth chipping in toothed belt in which rubber teeth are covered by a tooth cloth, is improved by providing for residual elongation of the tooth cloth so that it does not float or separate from the rubber teeth when tooth-deforming forces are applied, and by providing the tooth cloth with sufficient breaking strength so that the product of its breaking strength and its elongation are at least equal to a specified value.

## Claims

### Claim 1

A toothed belt comprising an elongated element of rubber disposed in a loop and having embedded tensile reinforcing bodies and a tooth cloth covering at least a single surface of said rubber element, wherein the tooth cloth has a weft extending in the direction of elongation of the rubber element and a warp extending in the direction of the width of the rubber element, and wherein the weft has a wooly finish and, before the tooth cloth is affixed to the rubber element, its weft exhibits an elongation percentage of at least 70% under stretching in the weft direction when subjected to a force of 1 kgf/cm, and the product of the elongation percentage (%) and the breaking strength (kgf/3 cm) of the weft is at least 16,000.