Patent ID: 7118512

Claim:
A self-actuating traction drive speed changer, comprising, a movable force input element having a planar drive surface, a movable force output element having a planar drive surface and being connectable to an output load, a movable roller element having a planar drive surface operatively connected for rotation to the input element, and in frictional engagement with the planar drive surface of the output element so that movement of the input element will cause the planar drive surface of the roller element to engage and frictionally move the output element, and wherein the input element is circular in shape, the roller element is slidably and rotatably secured to the outer end of an arm having a second end pivotally secured to a center of the input element, the output element is circular in shape and has a perimeter surface radially spaced from a perimeter of the input element, and the roller element is movable into the space between the input and output elements to be drawn into tight rotational frictional engagement with the input and output elements.