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Hearing aid with wireless battery charging capability

  • US 8,644,542 B2
  • Filed: 09/08/2009
  • Issued: 02/04/2014
  • Est. Priority Date: 09/08/2009
  • Status: Active Grant
First Claim
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1. A hearing aid, comprising:

  • a set of battery charging terminals configured to be connected to a battery;

    a receiver oscillator circuit electrically coupled to said set of battery charging terminals, said receiver oscillator circuit having a receiver coil tuned to resonate at a resonance frequency in a range of MHz, and at the resonance frequency said receiver coil configured to receive magnetic energy in a form of electromagnetic waves of a frequency similar to the resonance frequency of said receiver coil and to convert the magnetic energy of the electromagnetic waves received to an electrical current to charge the battery via said set of battery charging terminals; and

    a coating partially surrounding said receiver coil.

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