Belt tensioner, part therefor and methods of making the same

B - Operations – Transporting – 62 – M

Patent

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B62M 9/16 (2006.01) F16H 7/12 (2006.01) F16H 7/08 (2006.01)

Patent

CA 1218880

ABSTRACT OF THE DISCLOSURE A tensioner is provided herein for a power transmission belt that is adapted to be operated in an endless path. The tensioner includes a support unit for being fixed relative to the belt and a belt-engaging unit carried by the support unit, the belt-engaging unit being movable relative to the support unit. A mechanical spring unit is operatively associated with the support unit and with the belt-engaging unit for urging the belt-engaging unit relative to the support unit and against the belt with a force to tension the belt. A fluid dampening unit is operatively associated with the support unit and with the belt-engaging unit to dampen the movement of the belt-engaging unit relative to the support unit in at least one direction of movement thereof. In the improved tensioner, the mechanical spring unit may comprise a pair of springs disposed in substantially-parallel, spaced relation, with the fluid dampening unit having at least a part thereof disposed between the springs and in substantially parallel relation therewith. The fluid dampening unit comprises a rotary dampening arrangement. The rotary dampening arrangement provides an improved fluid dampening unit for a belt tensioner.

410907

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