Patent ID: 7090606
Filing Date: 2006-08-15
Classification: F16H

Abstract:
1. An adjustable tensioner comprising: a base; a pivot-arm that oscillates about a pivot secured to the base; a pulley attached to the pivot-arm and for engaging the belt; a compression spring with a first and operatively connected to the pivot-arm at an operative radius in relation to the pivot; and a damping mechanism that inhibits oscillatory movements of the pivot-arm; the pivot-arm comprising a concave arcuate surface that moves with the pivot-arm and is spaced a distance from the pivot, the concave arcuate surface oriented to generally face the pivot and a second end of the compression spring; the damping mechanism comprising a moveable shoe with a convex arcuate friction surface complimentary to and engaging the concave arcuate surface of the pivot-arm, a spring receiving portion that faces and attaches to a second end of the spring, and a surface portion that engages a protuberance secured to the base, the spring applying a spring force against the shoe pressing the convex arcuate surface against the concave surface generating a reactionary force to the shoe, the spring force and reactionary force combining to press the shoe against the protuberance, the improvement comprising; an adjustment portion extending from the base comprising a tool receiving portion; an indicator portion on the pivot-arm; an indicator portion disposed on the base to cooperate with the indicator portion on the pivot-arm for indicating a predetermined compression spring force.