Patent ID: 8328649

Claim:
A displacement unit comprising: a tubular outer part on an inner surface of which outer paths are provided at least in sections, an inner part that is displaceable in the tubular outer part in axial direction, on whose exterior surface inner paths are provided at least in sections, and a plurality of balls that are guided in a cage, the balls respectively located in outer paths and inner paths that are associated with each other in pairs for transmitting torque, whereby the tubular outer part and/or the inner part is provided with cage guide paths between at least some of the exterior paths or inner paths for axial guiding of the cage, wherein a quantity of the cage guide paths is smaller than the quantity of pairs of paths that is formed by the outer paths and the inner paths wherein the cage is made of plastic and comprises a plurality of integral guide path protrusions, the integral guide path protrusions engaging the cage guide paths, and wherein the displacement unit comprises a roller balance whereby in the pairs of paths that are formed by the outer paths and the inner paths several balls are provided in an axial direction.