Flexible recharge coil techniques

US9216297B2 · kind B2 · utility

Assignee

• Medtronic, Inc. · US

Inventors

• John E. Kast · Hugo, US
• Randy S. Roles · Elk River, US
• Bruce D. Fishbeck · Minneapolis, US
• Thipphaphone Lougiu · Brooklyn Park, US
• Todd A. Kallmyer · Tempe, US
• Jay T. Eisch · Wyoming, US
• David P. Olson · Tempe, US
• William C. Phillips · Brooklyn Park, US
• Matthew C. Lukasek · Green Isle, US
• Lonnie B. Gades · Eden Prairie, US

Key dates

• Filing date: Mar 22, 2011
• Grant date: Dec 22, 2015
• Expiry date: Sep 3, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49016
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Techniques adapted for use with recharging a rechargeable power source of an implantable device. One aspect relates to providing a flexible primary coil that can be transcutaneously coupled to a secondary coil of the implantable device. Multiple adjacent turns of the coil are grouped via lacing to form bundles. The bundles have at least one dimension that is selected to be a same size as a predetermined thickness of the coil. In one embodiment, the dimension is a diameter of the bundle. In another embodiment, the dimension is at least one of a length or width of the bundle. Insulating overmolding may be provided over the coil. In one embodiment, the resulting antenna structure is bidirectional such that substantially the same performance characteristics are obtained during recharge regardless of which of two major surfaces of the antenna is placed in proximity to the patient.