Richard B Stanley

US Patent:

53700120, Dec 6, 1994

Filed:

Mar 8, 1993

Appl. No.:

8/027340

Inventors:

Richard B. Stanley - Lincoln NE

International Classification:

F16H 118

US Classification:

74 8915

Abstract:

A device for convening rotational motion of a threaded shaft to linear motion in parallelism with the shaft and having a high load carrying capacity and operating efficiencies that are on the order of 98 percent (98%), with the device including a roller bearing nut for the shaft that is arranged to provide a linear motion unit (for the device) and a housing annular structure arranged to be fixed from rotation and including a plurality of circularly and concavely shaped thrust teeth of essentially "V" configuration 360 degrees (360. degree. ) thereabout, of which such thrust teeth are of identical size and configuration and are disposed in coaxial side-by-side relation normally of the desired direction of linear motion and at a formula defined pitch that also exceeds the pitch of the shaft threading; cooperating between the shaft threading and the thrust teeth are a set of thrust rollers seated about the linear motion unit in uniformly spaced relation, with each thrust roller having two (and only two) spaced pairs of similar flanges each riding on both the shaft threading and one of the thrust teeth of the housing, with the spacing of such flanges of each such thrust roller being similar and formula defined, and with each thrust roller pair riding on only certain of the opposing thrust teeth, though the rest of such teeth are similarly engaged by the flange pairs of the other thrust rollers involved.