Patent ID: 8708116
Filing Date: 2014-04-29
Classification: F16F,F16H,Y10T

Abstract:
1. A vibration damping device for damping torsional vibrations of a rotary member of a hydraulic transmission, in which the rotary member is rotated integrally with a drive side impeller creating a flow of fluid or with a driven side impeller driven by the created flow of the fluid, and in which the drive side impeller and the driven side impeller are connected with a lockup clutch actuated by fluid pressure, comprising: a holding chamber, which is rotated integrally with the driven side impeller; a rolling member held in the holding chamber, wherein the rolling member is rotated in a rotational direction of the driven side impeller but allowed to rotate relative to the driven side impeller; and a movable member, which is configured to lock the rolling member in the holding chamber when actuated by the fluid pressure for disengaging the lockup clutch, and to unlock the rolling member in the holding chamber when actuated by the fluid pressure for engaging the lockup clutch.