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Vibration energy conversion device

  • US 8,853,870 B2
  • Filed: 05/04/2012
  • Issued: 10/07/2014
  • Est. Priority Date: 05/04/2011
  • Status: Expired due to Fees
First Claim
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1. A vibration energy conversion device, comprising:

  • a casing;

    a magnet disposed in the casing;

    an untethered object in the casing attracted to the magnet and free to move relative to the magnet in at least two translational degrees of freedom; and

    at least one transducer element positioned to be affected by changes in a magnetic field of the magnet;

    wherein movement of the object relative to the magnet varies the magnetic field through the at least one transducer element, thereby generating electrical potential across at least a part of the at least one transducer element; and

    wherein, in the absence of vibration experienced by the casing, the magnet tends to retain the object in a rest position.

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