Patent ID: 7025340

Claim:
A fluid-filled vibration damping device comprising: a first mounting member; a second mounting member; a rubber elastic body elastically connecting the first and second mounting members, and partially defining a pressure-receiving chamber filled with a non-compressible fluid whose pressure is fluctuated upon application of vibration between the first and second mounting members; a flexible layer partially defining an equilibrium chamber filled with the non-compressible fluid and whose volume is changed due to deformation of the flexible layer; a partition member assembled with the second mounting member so as to form on the opposite sides thereof the pressure-receiving chamber and the equilibrium chamber, said partition member defining an orifice passage that is partitioned from the pressure-receiving chamber and the equilibrium chamber and permits a fluid communication between the pressure-receiving chamber and the equilibrium chamber, and including a first partitioning wall portion adapted to partition the orifice passage from the pressure-receiving chamber, and a second partitioning wall portion formed of a rubber elastic body and adapted to partition the orifice passage from the equilibrium chamber; and a partial reinforcing member provided to the partition member such that the partial reinforcing member extends across the first and second partitioning wall portions so as to reinforce a first opening of the orifice passage opening to the pressure receiving chamber, wherein the partial reinforcing member includes a widthwise plate portion affixed to and reinforcing the first partitioning wall portion, and a lengthwise plate portion affixed to and reinforcing the second partitioning wall portion at a portion situated in a vicinity of the first opening of the orifice passage opening to the pressure-receiving chamber, the second partitioning wall portion being elastically deformable at an other portion so as to absorb a relatively large fluid pressure.