Tensioner

Details Tensioner Tensioner

2008-01-22

2008-01-22

Johnson, Vicky A. (Department: 3682)

Machine element or mechanism

Mechanical movements

Rotary to intermittent unidirectional motion

Reexamination Certificate

active

07320262

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: 2575313 (1951-11-01), Covert et al.
patent: 4464146 (1984-08-01), Arthur
patent: 4634407 (1987-01-01), Holtz
patent: 4808148 (1989-02-01), Holtz
patent: 4917655 (1990-04-01), Martin
patent: 6422962 (2002-07-01), Lehtovaara et al.
patent: 7217207 (2007-05-01), Hallen
patent: WO 87/01166 (1987-02-01), None

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