Patent ID: 7077780
Filing Date: 2006-07-18
Classification: F16H

Abstract:
1. A toroidal type continuously variable transmission comprising: input and output discs coaxially and rotatably arranged about a common axis, the input and output discs having respective toroidal concave surfaces which face each other; power rollers each having a rounded outer surface and being interposed between the toroidal concave surfaces of the input and output discs; a loading cam that presses the input disc against the power rollers by a force that is proposal to an input torque; trunnions each supporting the corresponding power roller in such a manner that the power roller is inclinable relative to a center of curvature of the input and output discs; and power roller bearings rotatably supporting the power rollers relative to the respective trunnions, wherein the following inequality is established for a curvature ratio (Ro/(2×R  wherein: