[54] TRANSCUTANEOUS ENERGY TRANSFER DEVICE
[75] Inventor: Michael A. Borza, Ottawa, Canada
[73] Assignee: DEW Engineering and Development Limited, Ottawa, Canada
[21] Appl. No.: 09/035,844 [22] Filed: Mar. 6, 1998
[51] Int. CI. A61N 1 08
[52] U.S. CI 607/61; 607/60
[58] Field of Search 607/61, 33, 60;
600/16-18
[56] References Cited
U.S. PATENT DOCUMENTS
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5,350,413 9/1994 Miller 607/61
5,450,076 9/1995 Donig et al 340/870.39
5,495,241 2/1996 Donig et al 340/870.39
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5,713,939 2/1998 Nedungadi et al 607/33
5,713,954 2/1998 Rosenberg et al 623/3
5,741,316 4/1998 Chen et al 607/61
5,755,748 5/1998 Borza 607/61
Primary Examiner—Kennedy J. Schaetzle
Attorney, Agent, or Firm—Neil Teitelbaum & Associates
[57] ABSTRACT
In the design ol transcutaneous energy transler devices, variation in spacing between coils results in energy transler efficiency changes. These changes may have significant effect on a system. It is proposed to provide a plurality ol implanted coils for receiving energy simultaneously. Prelerably, a plurality ol coil pairs is used for translerring energy simultaneously. Also, a leedback system for use in a multiple coil system is disclosed.
23 Claims, 7 Drawing Sheets
