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Transcutaneous energy transfer device with magnetic field protected components in secondary coil

  • US 6,324,431 B1
  • Filed: 07/02/1999
  • Issued: 11/27/2001
  • Est. Priority Date: 07/06/1998
  • Status: Expired due to Term
First Claim
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1. A transcutaneous energy transfer device comprising:

  • an external primary coil adapted to receive an alternating drive signal for generating a magnetic field;

    an implantable secondary coil having mounted therein electronic components, said secondary coil for inducing a current when said secondary coil is inductively coupled to said primary coil, said induced current in said secondary coil generating a magnetic field; and

    a cage formed of a magnetically permeable material enclosing said electronic components to reduce inductive heating of said electronic components caused by the magnetic field of said primary and secondary coils;

    wherein said cage has walls of varying thickness.

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