Patent ID: 7174803
Filing Date: 2007-02-13
Classification: B62D,F16C,F16D

Abstract:
1. A steering shaft for motor vehicles which comprises an inner and an outer shaft part, each with a polygonal cross section, the shaft parts engaging in one another in telescoping fashion and being positively connected to one another by barrel-shaped rolls effective as rolling elements for the transmission of a torque, the running paths of the rolls each being fashioned between vertices on the outer sides of the inner shaft part and the inner sides of the outer shaft part, characterized in that the running paths are fashioned as troughs of a concavity approximating to the convexity of the rolls, said steering shaft further comprises spring elements at least between two opposite running paths, which spring elements are directly or indirectly braced under spring force against the respective running paths and wherein the spring elements comprise leaf springs.