Patent ID: 8052558
Filing Date: 2011-11-08
Classification: F16H

Abstract:
1. A tensioner for a chain driven power transmission system of an internal combustion engine having a ratchet mechanism comprising: a) at least one bracket having a first end, a second end and a longitudinal surface facing a strand of the chain; b) a longitudinal chain guide element having a chain sliding surface which slidably engages the chain, a first end and a second end, the chain guide element covering the longitudinal surface of the bracket, with the first end of the chain guide element firmly but non-permanently engaged around the first end of the bracket to form a first space therebetween and the second end of the chain guide element firmly but non-permanently engaged around the second end of the bracket to form a second space therebetween; c) a first retention groove on and perpendicular to the longitudinal surface of the bracket located in proximity to the first end of the bracket and a second retention groove on and perpendicular to the longitudinal surface of the bracket located in proximity to the second end of the bracket; d) an elongated resilient pad extending from a first end of the bracket to a second end of the bracket and located between the chain guide element and the longitudinal surface of the bracket; e) a channel on the longitudinal surface of the bracket running between the first retention groove and the second retention groove so that the resilient pad is forcibly displaced within the at least one channel in response to a force exerted on the chain guide element by a spike or surge in the tension of the chain; and f) an elongated support member having a first end and a second end located between the chain guide element and the resilient pad, wherein the first end of the elongated support member is loosely secured in the first retention groove and the second end of the elongated support member is loosely secured in the second retention groove allowing for lengthening of the support member when flattened.