Elastic mount having fluid chamber partially defined by oscillating plate actuated by moving coil in annular gap between two yokes connected to permanent magnet, and method of manufacturing the elastic mount

A method of manufacturing a fluid-filled elastic mount, comprising the steps of:

• elastically connecting a first and second support to each other through an interposed elastic body;
• elastically connecting an oscillating plate to one of said first and second supports to provide a fluid chamber defined by at least said elastic body;
• fixing an annular moving coil to a first side of said oscillating plate opposite to a second side of said oscillating plate which faces said fluid chamber;
• assembling an unmagnetized magnet assembly by providing a blank for a permanent magnet and connecting first and second yoke members to opposite end faces of said blank to define an annular gap between said first and second yoke members;
• magnetizing said blank to provide a permanent magnet in said magnet assembly, such that said permanent magnet and said yoke members define a closed magnetic path including said annular gap;
• and
• attaching said magnet assembly to one of said first and second supports such that said permanent magnet is disposed on said first side of said oscillating plate, and said annular moving coil is axially displaceable within said annular gap to oscillate said oscillating plate upon energization of said moving coil.