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Elastic mount and method of manufacturing the elastic mount

  • US 5,249,782 A
  • Filed: 12/03/1992
  • Issued: 10/05/1993
  • Est. Priority Date: 12/06/1991
  • Status: Expired due to Fees
First Claim
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1. A fluid-filled elastic mount comprising:

  • first and second supports 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, said permanent magnet being made of a plastic magnetic material including a magnetic material and a plastic material as a binder for said magnetic material;

    first and second yoke members 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; and

    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.

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