Belt tensioner

Details Belt tensioner Belt tensioner

1986-10-29

1988-02-09

Leppink, James A.

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...

F16H 712

Patent

active

047239344

ABSTRACT:
A belt tensioning device for engagement with the endless drive belt of a vehicle accessories drive system. A pivot support base is adapted to be mounted on a vehicle engine in a stationary position adjacent the drive belt and has a lever arm assembly pivotally mounted thereon. An idler pulley is mounted on an extended end of the lever arm assembly and is biased into tensioning engagement with the drive belt by a torsional coil spring. An arcuate-shaped plastic bearing strip is located between arcuate surfaces of the pivot support base and an outer cylindrical housing portion of the lever arm assembly and has two distinct bearing surfaces. The lever housing slides on the bearing strip during movement of the lever arm towards and away from the drive belt which provides frictional damping for the lever to reduce undesirable movement of the idler pulley.

REFERENCES:
patent: 4285676 (1981-08-01), Kraft
patent: 4472162 (1984-09-01), Hitchcock
patent: 4473362 (1984-09-01), Thomey et al.
patent: 4551120 (1985-11-01), Thomey
patent: 4557707 (1985-12-01), Thomey
patent: 4557709 (1985-12-01), St. John
patent: 4583962 (1986-04-01), Bytzek
patent: 4596538 (1986-06-01), Henderson

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