Elastic mount having fluid chamber partially defined by oscillating plate actuated by moving coil in annular gap between two yokes connected to permanent magnet

A fluid-filled elastic mount comprising:

• a first and a second support which are spaced apart from each other;
• an elastic body which is interposed between said first and second supports for elastically connecting the first and second supports and which partially defines a fluid chamber filled with a non-compressible fluid;
• an oscillating plate which partially defines said fluid chamber and which is displaceable to change a pressure of the fluid in said fluid chamber;
• a permanent magnet disposed on one of opposite sides of said oscillating plate remote from said fluid chamber;
• a first and a second yoke member which are connected to respective opposite magnetic pole faces of said permanent magnet and which cooperate with said permanent magnet to define a closed magnetic circuit, said first and second yoke members defining therebetween an annular gap in said magnetic circuit;
• an annular moving coil received in said annular gap and fixed to said oscillating plate, said moving coil being displaced in said annular gap in an axial direction thereof, to oscillate said oscillating plate upon energization of said moving coil;
• and
• a magnetic fluid which fills said annular gap in which said annular moving coil is received, said magnetic fluid including magnetic particles dispersed in a liquid medium.