Patent ID: 9709137
Date: 2017-07-18
CPC Classifications: B60K,F02B,F16H

Claim:
1. A tensioner for tensioning an endless drive member that is engaged with a rotary drive member on a shaft of a motive device, the tensioner comprising: a base that is mountable to the motive device; a ring that is rotatably supported by the base in surrounding relationship with the shaft of the motive device and which is rotatable about a ring axis; a tensioner arm pivotally mounted to the ring for pivotal movement about an arm pivot axis; a first tensioner pulley rotatably mounted to the tensioner arm, wherein the tensioner arm is biased towards a first span of the endless drive member on one side of the rotary drive member; and a second tensioner pulley that is rotatably mounted at least indirectly to the ring, wherein the second tensioner pulley is biased towards a second span of the endless drive member on another side of the rotary drive member; a first ring damping member that is positioned between the ring and the base and engages a first face of the base; a second ring damping member that is connected to the ring and engages a second face of the base; a clamping member that is connected to the ring such that the clamping member cooperates with the ring to clamp the base and the first and second ring damping members while still permitting sliding movement of the ring relative to the base; wherein the ring is rotatable in response to hub loads in the first and second tensioner pulleys that result from engagement with the first and second spans of the endless drive member.