Friction drive mechanism for converting a rotational movement into an axial movement, or vice versa

Abstract From the Canadian patent

A friction drive mechanism in which two axially displaced sets of rolling members arranged in a common two-part holder are in external frictional engagement with a smooth shaft the rolling, members being inclined relative to the shaft to perform a rolling movement thereon by relative rotational movement between the holder and the shaft, the two holder parts being clamped together by a hinge joint providing an automatical load-dependent bias and adjustment of the frictional engagement between the rolling members and the shaft.