Patent ID: 7523817
Filing Date: 2009-04-28
Classification: F16F

Abstract:
1. A torsional vibration damper comprising: a stator having at least one radially extending vane; a rotor arranged concentrically to said stator, the rotor being rotatable about an axis and having at least one vane extending radially toward said stator and alternating with said at least one vane of said stator to form at least one first working chamber having a volume which decreases when said rotor rotates in one direction relative to said stator, and at least one second working chamber having a volume which decreases when the rotor rotates in an opposite direction relative to said stator; a first collecting space connected to said at least one first working chamber; a second collecting space connected to said at least one second working chamber; a first partition between the first and second collecting spaces, the partition having a damping device which permits flow between the collecting spaces; and a pre-pressurized compensating space in working connection with the second collecting space; a second partition between the second collecting space and the compensating space, the second partition having a throttle which permits flow communication between the second collecting space and the compensating space; and a support rod, the first and second partitions being fixed to the support rod, wherein the first collecting space, the second collecting space, and the pre-pressurized compensating space are arranged coaxially in series along the axis.