Bearing of the conical discs of an infinitely variable cone pulley transmission

Claim 1

In an infinitely variable cone pulley transmission which comprises driving and driven shafts and two cone discs one on each of said shafts, one of which is stationary and the other movable in the axial direction, said shaft having means forming a shoulder thereon facing the outer side of the stationary disc, the stationary disc having a shoulder thereon facing the shaft shoulder, resilient means acting on the discs and urging them towards the shaft shoulder, said shoulders forming a first pair of annular bearing surfaces extending around the shaft, a support ring arranged between the planes of the bearing surfaces and having radially inwardly directed bores therein, a plurality of roller members engaged between the bearing surfaces and having trunnions projecting outwardly therefrom and engaged in said bores, the opposite sides of said roller members each forming a second pair of bearing surfaces which engage the first pair of bearing surfaces, the surfaces of one of said pairs being convexly curved about axes perpendicular to raDial planes through the axes of the trunnions, the other pair of bearing surfaces lying substantially in planes perpendicular to the shaft axis, one of said stationary disc and said shaft having a cylindrical surface portion opposite said ring, and said roller members having studs projecting therefrom opposite the cylindrical surface portion, whereby to limit inward movement of the roller members.