Patent ID: 8827864
Filing Date: 2014-09-09
Classification: F16H

Abstract:
1. A toroidal variable speed traction drive comprising a driving disc and a driven disc, said discs having a common axis; a plurality of pairs of contacting rollers interposed between said discs; the discs are urged together against the roller pairs by a clamping force; each of the rollers having a first rolling surface by which it rolls on the other roller of the pair, and a second rolling surface by which it rolls on the toroidal surface of a corresponding disc; each roller is mounted on a supporting axle about which it can rotate; the rotational axes of the rollers in a pair are supported in a plane or planes that contain the two points where the rollers of the pair contact the discs; at least one of the rollers in each pair is adapted to be moved to adopt a stable position within said plane by the reactionary force exerted on it by the other roller of the pair.