Patent ID: 8308147

Claim:
A vibration damper comprising: a first mounting member having substantially cylindrical shape, and connected to one of a vibration generation section and a vibration receiving section; a second mounting member arranged radially inside of the first mounting member, and connected to the other of the vibration generation section and the vibration receiving section; an intermediate cylinder member fitted to an inner peripheral surface of the first mounting member, and having an opening extending therethrough; an elastic body arranged between the intermediate cylinder member and the second mounting member, for connecting the intermediate cylinder member and the second mounting member so as to be elastically deformable relative to each other; a first pressure receiving liquid chamber arranged in-radially inside of the intermediate cylinder member, having an inner wall that is at least partly formed by the elastic body, and adapted to be filled with a liquid; an auxiliary liquid chamber in communication with the first pressure receiving liquid chamber, having a partition wall that is partly deformable so as to change its internal volume upon a change in the liquid pressure; and a pair of second pressure receiving liquid chambers formed by the elastic body and being formed on both sides of the intermediate cylinder member, and adapted to be filled with the liquid; wherein a portion of the elastic body forms a partition wall portion arranged in a region of the elastic body corresponding to the opening of the intermediate cylinder member so as to partition the pair of the second pressure receiving liquid chambers, and wherein the partition wall portion is not adhered to the intermediate cylinder member.