Patent ID: 6113514
Filing Date: 2000-09-05
Classification: B21K,F16H,Y10T

Abstract:
A disk for use in a toroidal type continuously variable transmission which comprises an input disk and an output disk each including a traction surface of a concave-arc-shaped cross section interposed between a small diameter end portion and a large diameter end portion and disposed concentrically with each other with their respective traction surfaces opposed to each other, and a power roller frictionally engageable with the respective traction surfaces of the input disk and the output disk to thereby transmit power, wherein said disk is used as one of the input disk and the output disk, andsaid disk comprising metal flows existing along a part of all surfaces of said disk at least including the traction surface, wherein said metal flows have such a positional relationship with respect to the surface of said disk that an angle .theta. formed between said metal flow existing along the surface and a tangent of the surface is smaller than or equal to 30 degrees.