Endless belt power transmission systems or components – Means for adjusting belt tension or for shifting belt,... – Pulley shifter
Reexamination Certificate
2006-01-31
2006-01-31
Johnson, Vickey A. (Department: 3682)
Endless belt power transmission systems or components
Means for adjusting belt tension or for shifting belt,...
Pulley shifter
C474S136000
Reexamination Certificate
active
06991570
ABSTRACT:
The invention is an improved power transmission belt tensioner of the type having a first pulley adapted to communicate with a surface of a power transmission belt, a first arm supporting the first pulley upon which the first pulley is rotatably mounted via a first pulley bearing, a second pulley adapted to communicate with a surface of the power transmission belt, a second arm supporting the second pulley upon which the second pulley is rotatably mounted via a second pulley bearing. It is improved by the inclusion of a strut, a first attachment point for the strut, and a second attachment point for the strut, with the strut attached to the first and the second attachment points. The first arm is rotatably supported at a first pivot. The second arm is rotatably supported at a second pivot. The first pulley and the first attachment point are each laterally offset in relation to the first pivot and substantially balanced in terms of parasitic torque across the first pivot.
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Castleman, Esq. C. H.
Dunlap, Esq. P. N.
Johnson Vickey A.
The Gates Corporation
Thurnau, Esq. J. A.
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