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Tunable vibration absorber

  • US 3,917,246 A
  • Filed: 04/15/1974
  • Issued: 11/04/1975
  • Est. Priority Date: 04/15/1974
  • Status: Expired due to Term
First Claim
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1. A vibration absorber for attachment to a vibrating mass comprising:

  • housing means;

    inertia mass means adapted to naturally reciprocate in response to vibrations of the vibrating mass, said inertia mass means comprising oppositely facing first and second piston faces disposed within said housing means along a common axis, said faces defining in combination with said housing means a first and a second pressurizable chamber each being independent of the other, said inertia mass means also including connecting means rigidly joining said piston faces;

    pressure regulating means associated with said chambers for maintaining substantially equal minimum pressures therewithin;

    control means associated with said pressure regulating means for setting the proper pressure in said chambers to cause said inertia mass means to naturally reciprocate with substantially the same period as the vibrations of the vibrating mass; and

    adjusting means associated with said inertia mass means causing adjustment in the position of said inertia mass means to maintain approximately symmetric restoring forces on said first and second piston faces during reciprocating motion of said inertia mass means.

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