Contact pressure transmitting system of a stepless speed change gear

Claim 1

A variable speed transmission comprising a driving input shaft and a driven output shaft, a plurality of rotatable conical rollers movable axially along their axes, a first pair of opposed elements frictionally engaging each of said conical rollers on opposite surfaces thereof to be rotatingly driven by said input shaft to rotate each of said conical rollers, a second pair of opposed elements frictionally engaging each of said conical rollers on opposite surfaces thereof and opposed to said first pair of elements and driven by said rollers for driving said output shaft, means for moving each of said conical rollers normal to its axis of rotation for varying the effective radii between each of said rollers and its associated pairs of elements to obtain variable speed transmission, one element of each pair of elements being axially movable to compensate for the variable width of the associated conical roller and the other element of each pair of elements being fixed to prevent any substantial axial movement thereof, the axially movable elements of the first and second pair of elements being diagonally opposed to each other on opposite sides of the associated conical roller, and contact pressure generating means of the cam type for applying pressure to one of said diagonal opposed fixed elements to assure engagement with its associated conical roller.