Patent ID: 8714530

Claim:
A fluid-filled vibration damping device comprising: a first mounting member; a second mounting member; a main rubber elastic body elastically connecting the first and second mounting members; a fluid chamber filled with a non-compressible fluid; a partition member supported by the second mounting member, dividing the fluid chamber into a first fluid chamber and a second fluid chamber, and having a holding area; a movable membrane held and arranged in the holding area of the partition member with an outer circumference part thereof being grasped by the partition member in a thickness direction; and communicating holes being formed with the partition member so that pressures of the first fluid chamber and the second fluid chamber are applied to opposite surfaces of the movable membrane through the communicating holes so that the movable membrane undergoes elastic deformation based on pressure difference between the first fluid chamber and the second fluid chamber, wherein the partition member comprises a first partition plate and a second partition plate overlapping, and the holding area is formed between overlapping surfaces of center parts of the first partition plate and the second partition plate, at least one claw-shaped part and at least one perforation window are formed at respective corresponding positions of an outer circumference part of the first partition plate and an outer circumference part of the second partition plate, and a fixing mechanism is constituted with the claw-shaped part latched in a circumference edge part of the perforation window to fix the first partition plate and the second partition plate, a widening area is provided between an outer circumference surface of the movable membrane and an inner circumference surface of the holding area, by making a distance between facing surfaces large partially at a circumference, and at least one of the first partition plate and the second partition plate has at least one first air vent hole that is pierced at a part constituting a wall part of the widening area.