System and method for reducing effect of magnetic fields on...

H - Electricity – 02 – K

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H02K 5/24 (2006.01) A61F 2/02 (2006.01) G01D 5/12 (2006.01) H02K 35/02 (2006.01)

Patent

CA 2725847

An electro-magnetic driver transducer free of torque in the presence of an external magnetic field, of any direction and orientation (such as in a Magnetic Resonance Imaging environment). The transducer includes a housing. At least one coil is associated with the housing. A plurality of magnets within the housing are aligned along an axis in an anti-parallel orientation. The magnets are free to move along an axis, wherein vibration of the magnets causes vibration of the housing. The transducer may be, for example, fixed to an ossicle.

Transducteur de commande électromagnétique dépourvu de couple en présence d'un champ magnétique externe, indépendamment de la direction ou de l'orientation de ce dernier (tel que dans un environnement d'imagerie par résonance magnétique). Ce transducteur comprend un boîtier auquel est associée au moins une bobine. Une pluralité d'aimants, dans le boîtier, est alignée le long d'un axe et selon une orientation antiparallèle. Ces aimants peuvent se déplacer librement le long d'un axe, leur vibration entraînant la vibration du boîtier. Le transducteur peut être fixé, par exemple, à un osselet.

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