Patent ID: 7540818

Claim:
A power train comprising: a plurality of balls, each ball having an internal axis of rotation configured to tilt in operation; a first disc configured to facilitate torque transfer between the first disc and the balls; a second disc configured to facilitate torque transfer between the second disc and the balls; a cage configured to support the plurality of balls axially and radially; an idler located radially inward of the balls, the idler capable of facilitating torque transfer between the idler and the balls; a first source of rotational power coupled to the first disc, second disc, cage, or idler; a second source of rotational power coupled to the first disc, second disc, cage, or idler; an electric generator coupled to the first disc, second disc, cage, or idler; and wherein the first and second sources of rotational power and the electric generator are configured to separately couple to one of the first disc, second disc, cage, or idler.