Patent ID: 9588524
Date: 2017-03-07
CPC Classifications: F16F,G05D

Claim:
1. A vibration control device installed in a vibrating body and controlling vibration of the vibrating body occurring as the result of an external force acting on the vibrating body, the vibration control device comprising: a rotatable shaft; at least one mass body fixed to the rotating shaft, the at least one mass body being rotatable at a vibration frequency equal to the vibration frequency of the vibration of the vibrating body, and also rotatable so that the center of gravity thereof is in a direction opposite to that of the external force acting on the vibrating body; and an activation apparatus selectively couplable to the rotatable shaft to drive the rotating shaft in a rotational motion to impart an initial velocity to the at least one mass body and decouplable from the rotatable shaft after imparting the initial velocity to the at least one mass body.