Patent ID: 6699131
Filing Date: 2004-03-02
Classification: F16F

Abstract:
A torsional vibration damping apparatus for use in a power train of a motor vehicle, comprising:an input damper part rotatable about an axis of rotation, an output damper part rotatable about said axis of rotation through a limited angle of relative rotation in respect of the input damper part, guide passages on at least one of the damper parts arranged arcuately and concentrically about said axis of rotation, a spring arrangement disposed in the guide passages, restrained by the guide passages radially as well as axially relative to said axis of rotation, and coupling the two damper parts together with a rotational resilience, said spring arrangement comprising coil thrust springs that are precurved over their longitudinal extension when not installed, and a means for protecting said guide passages against wear from friction occurring between said coil thrust springs and said passages.