Patent ID: 8418822

Claim:
A torsional vibration damper or torsionally flexible coupling, comprising: an inner part, an outer part that is arranged in ring shape around the inner part, and spring elements, which join the inner part and outer part in a torsionally flexible manner, wherein the spring elements subdivide a space formed between the inner part and the outer part into a plurality of successive chambers in the circumferential direction of the damper or the coupling, with these chambers being filled with a viscous medium and connected to one another, and wherein at least two groups of spring elements are provided, which have deflection lines that differ in circumferential direction, wherein first spring elements are formed on the inner part and with their free ends being supported by grooves on the outer part, wherein second spring elements are formed on the outer part and with their free ends being supported by grooves on the inner part, and wherein said first and second spring elements are supported with zero-clearance at their free ends in said grooves.