Belt tensioner and method of making the same

Details Belt tensioner and method of making the same Belt tensioner and method of making the same

1987-11-09

1988-11-15

Bui, Thuy M.

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...

474117, F16H 712

Patent

active

047846313

ABSTRACT:
A tensioner for a power transmission belt that is adapted to be operated in an endless path and a method 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, and 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. The spring unit has a longitudinal axis and is spiraled about the axis thereof. The support unit comprises a shaft unit having a longitudinal axis and is fixed from movement relative to the belt engaging unit, the belt engaging unit having a portion thereof rotatably carried by the shaft unit so as to rotate relative to the shaft unit. The support unit comprises a cup-shaped casing having an open end and receiving the spring unit therein. An antifriction disc-like member is disposed on the shaft unit between the portion of the belt engaging unit and the spring unit, the disc-like member substantially sealing closed the open end of the casing whereby the disc-like member performs a dual function.

REFERENCES:
patent: 2753724 (1956-07-01), Leyer et al.
patent: 3413866 (1968-12-01), Ford
patent: 4299584 (1979-12-01), Sproul
patent: 4351636 (1982-09-01), Hager
patent: 4362525 (1982-12-01), Sproul
patent: 4464147 (1984-08-01), Foster
patent: 4472162 (1984-09-01), Hitchcock
patent: 4473362 (1984-09-01), Thomey et al.
patent: 4536172 (1985-08-01), Burris et al.
patent: 4596538 (1986-06-01), Henderson

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