Patent ID: 7341524

Claim:
A torsional vibration damper comprising: a prime mover having a rotary output element; a first mass non-rotatably connectable with the rotary output element, the first mass including a primary flywheel of a split flywheel; a second mass rotatable relative to the first mass, the second mass including a secondary flywheel of the split flvwheel; a first energy storing device operating between the first and second masses; a second energy storing device operating between the first and second masses in parallel with the first energy storing device and with freedom of rotation relative to the first energy storing device; and a connection disposed between the second energy storing device and the first and second masses and arranged to develop a degressive effect in response to only angular displacements of the first and second masses relative to each other of not more than 10°; the connection including a first element configured to fixedly connect the second energy storing device to one of the first and second masses, a securing element configured to secure the second energy storing device to the other of the first and second masses, the securing element including a freewheel arrangement.