Patent ID: 8632413

Claim:
A torsional vibration damper comprising: a damper housing, a damping element, which is located within the damper housing and is arranged between a first element and a second element, wherein the first element and the second element are rotatable relative to one another, and a coupling part, which can be axially displaced along an axis and is arranged in a housing between the first and the second element, wherein: the coupling part in the housing divides a chamber into two partial chambers, the first element is connected to the coupling part by way of first rigid coupling elements, which are mounted in a rotatable manner, the second element is connected to the coupling part by way of second rigid coupling elements, which are mounted in a rotatable manner, the first and second rigid coupling elements are constructed in the form of ball bars which are mounted in a rotationally articulated manner at both ends such that the first and second rigid coupling elements axially extend and contract between the coupling part and their respective first and second elements in response to relative rotation between the first and second elements generated by at least one of the first and second elements, the damper housing includes no medium flow passages connecting an interior region of the damper housing with a region outside of the damper housing, and during a relative rotation between the first and the second element a) the coupling part is displaced along the axis against the spring force of at least one spring element, wherein at least a first spring element is arranged in a first partial chamber between the first element and the coupling part, and at least a second spring element is arranged in a second partial chamber between the second element and the coupling part, or b) the coupling part is displaced along the axis against a medium, which acts on both sides of the coupling part, wherein the medium is located in internal or external partial chambers within the damper housing.