Patent ID: 7241225

Claim:
A torsional vibration insulator for a drive train of a vehicle, comprising: a primary element and a secondary element which can rotate relative to one another about a rotational axis; at least two spring elements which extend in an arc in a circumferential direction about the rotational axis; and radial support devices, wherein each of said spring elements is supported on a radial outer face by one of the radial support devices and in the circumferential direction on a first spring element end by the primary element and on a second spring element end by the secondary element, said radial support devices supporting said spring elements at locations displaced away from said first and second spring element ends, each of the two spring elements has a length which is changeable in the circumferential direction by rotating the primary element relative to the secondary element, the radial support devices have a plurality of support elements which engage the radial outer face of each of the spring elements and are located on the radial support devices in the circumferential direction in such a way that the support elements move with the spring elements in the circumferential direction when the respective lengths of the spring elements are changed, and each of the support elements engages its associated spring element in a friction-fit manner to protect against slippage in the circumferential direction.