Belt tensioner, part therefor and methods of making the same

Endless belt power transmission systems or components – Means for adjusting belt tension or for shifting belt,... – Guide roll mounted for movement of its axis along arcuate...

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F16H 716

Patent

active

047086971

ABSTRACT:
A tensioner for a power transmission belt that is adapted to be operated in an endless path, a part therefor and methods of making the same are provided, the tensioner comprising a support unit for being fixed relative to the belt, a belt engaging unit carried by the support unit and being movable relative thereto, a mechanical spring unit operatively associated with the support unit and 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, and a fluid dampening unit operatively associated with the support unit and the belt engaging unit to dampen the movement of the belt engaging unit relative to the support unit in a least one direction of movement thereof, the fluid dampening unit comprising a rotary dampening unit. The rotary dampening unit has a fluid therein and has at least one rotatable disc-like member disposed in the fluid, the disc-like member having a part for creating a shear in the fluid when the disc-like member moves in the fluid.

REFERENCES:
patent: 2032289 (1936-02-01), La Croix
patent: 2514139 (1950-07-01), O'Connor
patent: 3865216 (1975-02-01), Gryglas
patent: 4309174 (1982-01-01), Sproul
patent: 4392840 (1983-07-01), Radocaj
patent: 4601683 (1986-07-01), Foster

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