Patent ID: 7424833

Claim:
A telescopically moving structure comprising a nut connected in a rotationally fixed manner with respect to a frame part, a spindle tube having an external thread in engagement with said nut and an internal thread with a direction of inclination opposite to that of said external thread, a non-rotational spindle having an external thread in engagement with the internal thread of said spindle tube, a drive shaft connected with said spindle tube in a manner such that the spindle tube is rotationally fixed, but slidable in an axial direction with respect to said drive shaft, wherein the improvement comprises two pairs of longitudinal tracks formed in the drive shaft; wherein each of said pairs of tracks is located on opposite sides of the drive shaft; wherein said spindle tube has a bushing fastened thereto, and wherein torque-transferring rolling bodies are journalled in said bushing to respectively engage within said longitudinal tracks in said drive shaft.