The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2025
Filed:
Apr. 01, 2021
Michel Oltramare, Crans-près-Céligny, CH;
Hector Querry, La Neuveville, CH;
Guillaume Heisel, Bienne, CH;
Adrien Hoffet, Prilly, CH;
Jean-Luc Thuliez, Le Landeron, CH;
Etienne Crozier, La Neuveville, CH;
Robin Zimmermann, La Neuveville, CH;
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Abstract
The present invention relates to the operating principle of a loudspeaker () with an induction motor (). The motor () has two magnets (and) positioned on either side of a central core (). The magnets (and) thus create two magnetic fields (and) doubling the magnetic field detected in the movable armature (). The magnetic field coupled to the electrical field generated by a fixed coil () creates a force in the armature (), which is linked to diaphragm () producing the sound. Thus, by increasing the magnetic field, and therefore the force generated in the armature (), the performances of the loudspeaker () are likewise enhanced.