Reducing effect of magnetic and electromagnetic fields on an implant's magnet and/or electronics
US7566296B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2006 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Jun 27, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W8/26
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An implantable magnet that can freely turn in response to an external magnetic field, thus avoiding torque and demagnetization on the implantable magnet. The implantable magnet can be combined with an electric switching function depending on the orientation of an external magnetic field, thus protecting an implanted coil and/or implant electronics against induction of over-voltage or performing an electric switching function for other various purposes. The magnetic switch may further include, for example, a first switching contact and a second switching contact. A magnetically soft body that includes an electrically conductive surface is shiftable between a first position where the body is in simultaneous contact with the first and second switching contacts, and a second position where the body is out of contact with at least one of the first and second switching contacts. The body and the implantable magnet are positioned such that the body is shifted to one of the first position and the second position as a function of the external magnetic field resulting in a magnetic force between the magnet and the magnetically soft body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.