Patent ID: 6945891
Filing Date: 2005-09-20
Classification: B29D,F16G,F16H

Abstract:
1. A process for reducing the angular vibration of a camshaft in relation to a crankshaft in an internal combustion engine wherein the camshaft is driven by a toothed belt comprising a cured elastomer belt body portion and a tensile member formed of a helically spiraled cord embedded therein; a cord treatment composition comprising an elastomer latex coating at least a portion of said cord, and characterized in that said process comprises the steps of: a. selecting for said cord at least one yarn comprising a carbon fiber; b. incorporating in said cord treatment composition a resorcinol-formaldehyde reaction product; c. selecting the elastic modulus of said cord treatment composition at a temperature of 20° C. to be within the range of from about 1.0×10 d. applying said cord treatment composition to the cord to form a treated cord; e. incorporating the treated cord into an un-cured elastomer composition to form an assembly; and f. curing the assembly to form said toothed belt.