Search International and National Patent Collections

1. (WO2001037926) APPARATUS FOR TRANSFERRING ENERGY ACROSS A BOUNDARY

Pub. No.:    WO/2001/037926    International Application No.:    PCT/US2000/031923
Publication Date: Fri Jun 01 01:59:59 CEST 2001 International Filing Date: Wed Nov 22 00:59:59 CET 2000
IPC: A61N 1/08
A61N 1/378
Applicants: ABIOMED, INC.
Inventors: ZARINETCHI, Farhad
Title: APPARATUS FOR TRANSFERRING ENERGY ACROSS A BOUNDARY
Abstract:
Methods and apparatus for transferring energy across a boundary, to provide power to devices (110) internal to the body, comprising: a transcutaneous energy transfer (TET) device (100) functioning as a power transformer including an 'oversized' primary winding (102) affixed in proximity to an exterior surface of the skin, and a secondary winding (106) implanted in the body and aligned with the primary winding. A first area delimited by the primary winding, from which a magnetic field is generated, is larger than a second area delimited by the secondary winding of the TET transformer, which intercepts the magnetic field. The larger area of the 'oversized' primary winding allows a significant displacement between the primary and secondary windings while nonetheless maintaining uniformity of the magnetic field that impinges on the secondary winding. As a result, the secondary winding is capable of providing sufficient power to one or more implanted devices notwithstanding shifts in the relative positions of the windings.