Vibration absorbing apparatus
Patent 4940914 Issued on July 10, 1990. Estimated Expiration Date: 
May 16, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 16, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3179823 Electromechanical transducer-coupled mechanical structure with negative capacitance compensation circuit Electronically tunable resonant accelerometer Drag modification piezoelectric panels Method and apparatus using a piezoelectric film for active control of vibrations Method and apparatus for active control of vibrations Patent #: 4626730 InventorsAssigneeApplicationNo. 194371 filed on 05/16/1988US Classes:310/326, Combined with damping structure310/316.01Input circuit for simultaneous electrical and mechanical output from piezoelectric elementExaminersPrimary: Budd, Mark O.Attorney, Agent or FirmForeign Patent References
International ClassH01L 041/08Foreign Application Priority Data1986-05-26 JPAbstractA vibration absorbing apparatus for reducing vibrations of a vibration damping objective comprises a vibration member excited by a piezo-ceramic element. The voltage applied to the piezo-ceramic element is controlled in accordance with the vibration state of the objective.Field of SearchPiezoelectric elements and devicesCombined with resonant structure Sandwich or Langevin type With mechanical energy coupling means Vibration or noise suppression Combined with damping structure On back of piezoelectric element Input circuit for mechanical output from piezoelectric element Electrical output circuit INCLUDING ENERGY ABSORBING MEANS, E.G., FLUID OR FRICTION DAMPING Including vibration isolation means | |
