Patent ID: 7419144

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 pressure receiving chamber whose wall is partially formed by the rubber elastic body to accommodate pressure fluctuations during vibration input; an equilibrium chamber whose wall is partially formed by a flexible film to accommodate changes in volume; the pressure receiving chamber and the equilibrium chamber being disposed on either side of a partition member supported by the second mounting member, and having a non-compressible fluid sealed therein; an orifice passage through which the pressure receiving chamber and equilibrium chamber communicate with each other; a movable panel housed in a housing space that is provided in the partition member and held in communication with the pressure receiving chamber and the equilibrium chamber via through holes formed through the partition member so that a pressure of the pressure receiving chamber is exerted onto one side of the movable panel and a pressure in the equilibrium chamber is exerted onto another side of the movable panel, wherein minute pressure fluctuations in the pressure receiving chamber during vibration input can be escaped into and absorbed by the equilibrium chamber by means of the movable panel, the movable panel is composed of a movable rubber plate formed by a rubber elastic body, and includes at least partially a corrugated part which expands in generally a form of a corrugated panel by means of continuous depressions and protrusions, the movable rubber plate has at a central portion thereof a circular flat plate portion, and at a peripheral portion thereof an annular plate portion that constitutes the corrugated part and is formed in a curved and undulating shape so as to be corrugated in a thicknesswise direction in a circumferential direction along an entire circumference thereof, wherein a center portion in the thicknesswise direction of the annular plate portion oscillates vertically in the circumferential direction.