Tensioner for power transmission belt

Details Tensioner for power transmission belt Tensioner for power transmission belt

B - Operations, Transporting

61

G

74/265

B61G 7/06 (2006.01) F16H 7/12 (2006.01) F16H 7/08 (2006.01)

Patent

CA 1319541

ABSTRACT OF THE DISCLOSURE A tensioner is provided for a power transmission belt. The tensioner includes at least one return spring associated with a shaft of a tensioning roller with which the belt cooperates for controlling the displacement of said roller under the action of the spring. It also includes two variable volume chambers, each defined by an elastomer sheath, filled with a liquid and communicating with each other at one of their ends through a valve device through which the liquid flows into or out of said chambers and which introduces a damping effect of the vibrations likely to occur in the belt. The sheath and a first spring portion associated with one of the chambers are fast with each other, by enveloping the first spring portion in the sheath. The sheath and the second spring portion associated with the other chamber are independent of each other, the second spring portion surrounding the sheath and working under extension.

602528

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