Transcutaneous energy coupling using piezoelectric device
US5749909A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1996 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Nov 7, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3787
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An energy transmission system for transmitting energy non-invasively from an external unit to an implanted medical device to recharge a battery in the medical device. An alternating magnetic field is generated by the external charging unit and a piezoelectric device in the implanted medical device vibrates in response to the magnetic flux to generate a voltage. The voltage is rectified and regulated to provide charging current to a rechargeable battery in the medical device. A series of piezoelectric devices may be connected in series to produce a larger voltage than can be produced by any one piezoelectric device. Acoustic waves generated by the external charging unit alternatively can be used to vibrate the piezoelectric device instead of a changing magnetic flux. The acoustic waves are generated by an external source coupled to a piezoelectric transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.