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Magnetic shield for primary coil of transcutaneous energy transfer device

  • US 6,389,318 B1
  • Filed: 07/02/1999
  • Issued: 05/14/2002
  • 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 to which energy to be transferred is applied;

    an implanted secondary coil configured to be inductively coupled to the primary coil and connected to apply energy to a subcutaneous utilization device; and

    a magnetic shield covering a side of the primary coil opposite the secondary coil, wherein the magnetic shield comprises a plurality of segments of very high permeability material arranged in one or more concentric rings and connected by a porous flexible material.

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