Patent ID: 8672304

Claim:
An anti-vibration device comprising: a tubular first attachment member connected to at least one of a vibration generating section and a vibration receiving section; a second attachment member connected to the other of the vibration generating section and the vibration receiving section; a first rubber elastic body elastically interconnecting the first and second attachment members; a liquid containing a first liquid and a second liquid which are insoluble in each other, the second liquid having a smaller surface tension than the first liquid, and the second liquid in the liquid weighing less than the first liquid in the liquid; a partition member partitioning the inside of the first attachment member into a main liquid chamber and a sub liquid chamber, the main liquid chamber having a first partition wall and having a portion of the liquid enclosed therein, an inner volume of the main liquid chamber changing due to deformation of the first rubber elastic body, a part of the first partition wall being formed of the first rubber elastic body; and the sub liquid chamber having a second partition wall and having a portion of the liquid enclosed therein, at least a part of the second partition wall being adapted to be deformable, the liquid being enclosed in the main liquid chamber and the sub liquid chamber; and an orifice passage provided between the outer peripheral surface of the partition member and the inner peripheral surface of the first attachment member so as to communicate the main liquid chamber and the sub liquid chamber, wherein the second liquid is configured to become granular and to be dispersed in the first liquid, when receiving a vibration, and wherein the liquid contains 80 to 99 wt % of the first liquid, and contains 1 to 20 wt % of the second liquid.