Abstract: A constant velocity universal joint has an outer joint member with a bore therethrough and an inner joint member within the bore. A plurality of torque transmitting elements, such as balls, are positioned within opposed grooves formed in the facing surfaces of the inner and outer joint elements. The balls are retained in a ball plane by means of a cage which has an inner concave surface guided upon a convex spherical surface of the inner joint member and an outer spherical surface guided within the bore. The outer spherical face of the cage has at least three circumferentially spaced guide ridges which are guided within a plurality of grooves formed within the bore of the outer joint member and between the ball grooves.

Abstract: A homokinetic coupling is disclosed for coupling two rotatable shafts each having an axis of rotation such that the ratio of the speeds of rotation of said shafts about their respective axes is maintained constant even as said axes undergo relative time-varying re-orientations.

Abstract: A constant velocity or homo-kinetic universal joint transferring torque through at least three ball members between inner and outer coupling members and held by a cage in a common plane bisecting the angle between the axes of thecoupling members. The radial dimension of the joint is kept at a minimum and the cage rides on spherical walls of the inner and outer coupling members and has circumferentially spaced, radial lugs increasing the guide surfaces of the cage windows. The cage is positioned normal to the open face of the outer coupling member, pushed into the coupling member, rotated circumferentially to align the lugs to fit into the grooves of the coupling member, and then rotated axially into the plane of the coupling member to hold the coupling members in fixed axial relation.