Abstract: A homokinetic coupling which has a housing or outer ring with a cavity limited by a spherical surface and open toward the outside at least one edge. An inner ring, having an outer spherical surface with axially extending grooves is placed within this cavity. A set of balls flattened at one edge is accommodated at that edge in the grooves. The bottoms of the grooves form a rolling surface along which the balls are capable of moving by the flattened edge. At the other edge the balls are accommodated, rotating by the spherical edge in a recess forming a part of the housing. The housing has a plurality of rotating ball-shaped elements with a recess in each element, in which recess the spherical edge of the respective ball is partially accommodated.

Abstract: A device for converting rotary motion into linear motion includes a smooth shaft and a plurality of circular rolling bearings mounted in a cylindrical housing. The rolling bearings each have an inner diameter greater than the outer diameter of the shaft. Each bearing is mounted in a two piece support member which orients the center line of the bearing at an angle to the center line of the shaft. The use of the two piece support members to properly orient the center line of the rolling bearings facilitates assembly of the device.

Abstract: A homokinetic coupling with an inner ring contained within a groove-like ball race within the outer ring, and with a series of flattened balls therebetween for imparting rotation and transmitting forces, the balls being at least partially enclosed by a flexible annular ball cage.

Abstract: A universal joint is provided with an outer ring and has a socket, an inner ring accommodated in the socket, and a set of flatted balls accommodated in groove-like ball races. The ball races are formed in the surface of the socket and in the surface of the inner ring, respectively, to transmit rotation from one ring to the other ring, wherein a ball with its flat face can freely cooperate with a curved surface of a race.