Electromagnetic acceleration transducer for implantable medical device
US5941904A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1997 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Sep 12, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36542
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An electromagnetic accelerometer includes a rigid shell with a cavity in which two magnets are fixed at either and of the rigid shell and one magnet is allowed to move between the fixed magnets. The three magnets are arranged so that the movable magnet is suspended between the fixed magnets by magnetic forces from the fixed magnets. A coil of wire surrounds the shell and magnets. An acceleration of the accelerometer causes a displacement of the movable magnet with the cavity. As a result, an electrical current is induced in the coil of wire. The voltage in the coil of wire is proportional to the acceleration experienced by the accelerometer. The electromagnetic accelerometer is particular useful in an implantable pacemaker or defibrillator and can be included in either or both a lead or the housing of the pacemaker. Further, the accelerometer generates its own voltage in response to acceleration and the resulting electrical energy can be used as a power source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.