Universal Joint

Year	Description
1991	Invention patented by Bertin R. Jr. 134 Ramona Rd. Portola Valley CA Chabot and Lawrence D. Knapp on October 1st, 1991. Abstract: A universal joint including a ball and a ball socket. The ball includes a drive socket for connection to a driving or driver shaft. The drive socket is located substantially totally within the ball socket.
1993	Invention patented by Martin G. Riccitelli, Frederick W. III Mitchell, William E. Korzan, and David E. Boyden on October 28th, 1993. Abstract: A double cardan universal joint having a pair of annular ring yokes pivotally connected by a tubular coupling yoke. Specific examples are provided of using the double cardan universal joint as a non-constant velocity joint in a three universal joint steering system whereby a the three universal joint system operates at constant velocity.
1995	Invention patented by Markus Eschbach, Peter Schwarzler, and Hans-Heinrich Welschof on September 7th, 1995. Abstract: A universal joint for small articulation angles, especially, an intermediate joint in a propeller shaft of motor vehicles, has an outer joint part (11) with longitudinally extending first ball tracks (14) which, between stop faces, include an axial length with an unchanged cross-section; an inner joint part (31, 51) with longitudinally extending second ball tracks (36, 56) whose axial length is greater than that of the first ball tracks (14); and torque transmitting balls (15) guided in the radially opposed first and second ball tracks (14, 36, 56). The outer joint part (11), at least in the axial region of the ball tracks (14) is produced as a formed plate metal part with an approximately constant wall thickness. The ball tracks (14), in the outer joint part (11), are formed by circumferentially distributed formations (13) axially closed at both ends by stops (16, 17).
Source: selected by the editor from original sources.

Universal Joint

Invention: Universal joint