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Externally tuned vibration absorber

  • US 4,694,650 A
  • Filed: 07/28/1986
  • Issued: 09/22/1987
  • Est. Priority Date: 07/28/1986
  • Status: Expired due to Fees
First Claim
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1. In a hydraulic apparatus of the type having a housing filled with a relatively incompressible fluid, said housing being secured to a prime mover and containing diaphragm means for converting vibratory energy transmitted from the prime mover into pressure waves within the fluid for oscillating a movable element along a linear path of motion, the improvement comprising at least one vibratory absorber unit attached to the outside of the housing for absorbing vibrational energy resulting from the oscillation of the movable element that includes a spring means and an absorber mass affixed to the spring means for reciprocal movement parallel with the path of travel of said movable element, and means to adjust the resonant frequency of the absorber means whereby the resonant frequency of the absorber means can be matched to the frequency range of the pressure waves.

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