BigPatents India

The present invention relates to a steering shaft variable in length for steering devices of motor vehicles, comprising at least two coaxially arranged profiles deviating from the circular form, at least one of them being formed as a tubular part into which the other profile is inserted by its end piece and is axially slid ably mounted therein, but with interfitting hold for transmission of torque, the outer peripheral contour of the inner profile and the inner peripheral contour of the outer profile at least section-wise and approximately conforming with each other and said peripherally closed contours being at least partly formed by successive curved sections, the radii of curvature of the curved sections thereby being positioned along the respective peripheral contour alternately inside and outside of the respective profile and a circumferential gap of for instance variable width along its circumference being defmed between the two profiles, and the gap accommodating a sliding sleeve made of macro-molecular material, characterised in that the sliding sleeve only section-wise and alternately applies along its peripheral contour against the walls of the profiles defining the gap, the sliding sleeve alternately applying against the convex sections of the inner profile and the concave sections of the outer profile.