Tensioner

Details Tensioner Tensioner

2007-05-15

2007-05-15

Ridley, Richard (Department: 3682)

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...

C474S101000

Reexamination Certificate

active

11265868

ABSTRACT:
A tensioner comprising a base having a toothed portion, a pivot arm pivotally engaged with the base, a pulley journalled to the pivot arm, a spring disposed between the base and the pivot arm for biasing the pivot arm in a first direction, a mechanism disposed on the pivot arm and engaged with the base, the mechanism comprising a rotatable geared member and a second spring engaged between the geared member and the pivot arm, the second spring biasing the pivot arm in the first direction, and the geared member having a non-toothed portion that when the non-toothed portion is engaged with the toothed portion it prevents substantial rotation of the pivot arm in a reverse direction from the first direction.

REFERENCES:
patent: 2337591 (1943-12-01), Coulson
patent: 4634407 (1987-01-01), Holtz
patent: 4804148 (1989-02-01), Etheridge
patent: 4808147 (1989-02-01), Graham
patent: 4808148 (1989-02-01), Holtz
patent: 5234385 (1993-08-01), Kawashima et al.
patent: 6422962 (2002-07-01), Lehtovaara et al.
patent: WO 87/01166 (1987-02-01), None
patent: WO 01/96763 (2001-12-01), None

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