Patent ID: 7503431
Filing Date: 2009-03-17
Classification: B64G,F16F

Abstract:
1. A mechanical rotational drive comprising: a bar-like torsion element extending along a longitudinal axis of rotation, said bar-like torsion element having a first end and a second end; a bearing device, the first end of said bar-like torsion element being clamped in said bearing device, the second end being a free end; said torsion element being rotatable along said longitudinal axis of rotation whereby said second free end of the torsion element being rotatable relative to said first clamped end, between a tensioned position and a relaxed position; a length of the torsion element in a tensioned position being reduced with respect to a length of the torsion element in the relaxed position; a device for transmitting a torque to and from the torsion element positioned in an area of the free end of the torsion element; a damping device is positioned in an axial direction of the torsion element at a fixed distance from the bearing device and adjacent to the free end of the torsion element; and a damping part is provided on the torsion element in the area of the free end of the torsion element, said damping part in the relaxed position of the torsion element being in friction engagement with the damping device, said damping part in the tensioned positioned of the torsion element not being engaged with the damping device.