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US 5,350,413 AGranted
Transcutaneous energy transfer device
AssigneeUniversity of Ottawa
InventorJohn A. Miller
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AssigneeUniversity of Ottawa
InventorJohn A. Miller
Estimating the term…
An improved transcutaneous energy transfer (TET) device comprises a primary winding for placement on or near a skin surface, and a secondary winding for implantation under said skin surface. A field effect transistor (FET) is arranged to switch said primary coil across an external DC power supply. A tuning capacitor is linked to said primary coil whereby said primary coil, when said FET is turned off, will resonate at its natural frequency thereby compensating for drift in component values and reducing power transfer sensitivity to component drift. In an alternative aspect of the invention, a bidirectional communications link is provided for the transfer of data across a boundary layer by infrared signals. A plurality of transmitters are arranged in a circular pattern on one side of the boundary layer, whereas a receiver is positioned within the circular pattern along the opposite side of the boundary layer.
An improved transcutaneous energy transfer (TET) device comprising:
A transcutaneous energy transfer system comprising a transformer having a primary winding and a secondary winding, said primary winding having a generally shallow bell shape to facilitate placement on a skin surface and said secondary winding having a generally shallow bell shape complementary to the shape of said primary winding to facilitate subcutaneous implantation adjacent to said primary winding, said secondary winding being dimensioned to be received within said primary winding to allow for a substantial amount of variation in the relative positions of said primary and secondary windings while minimizing the variation in coupling between said windings.
Dependencies are inferred from the claim text.