Patent ID: 9618054
Date: 2017-04-11
CPC Classifications: F16D,F16F,F16H

Claim:
1. A torsional vibration damper, comprising: an axis of rotation; an input flange arranged to receive torque; an output flange having a first outer circumferential surface; an intermediate plate configured to transmit torque between the input flange and the output flange; a first elastic element having a first end circumferentially displaced from a second end, and a second outer circumferential surface, the first elastic element operatively arranged to transmit torque from the input flange to the intermediate plate; a second elastic element displaced radially inward from the first elastic element and operatively arranged to transmit torque from the intermediate plate to the output flange; a retainer to brace the first elastic element at the second outer circumferential surface, the retainer having a contact element to engage the first end of the first elastic element, the retainer centered on the axis of rotation and supported by the first outer circumferential surface, wherein the retainer is rotatable with respect to the output flange; and, a clutch axially arranged between the input flange and the retainer, the clutch having a friction disk non-rotatably connected to the retainer and operatively arranged to frictionally engage with the input flange by means of a piston that presses the friction disk axially against the input flange.