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:
Feb. 08, 2022
Filed:
Oct. 24, 2019
Applicant:
Bose Corporation, Framingham, MA (US);
Inventor:
Christopher J. Link, Arlington, MA (US);
Assignee:
Bose Corporation, Framingham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 9/06 (2006.01); H04R 9/04 (2006.01); H04R 9/02 (2006.01); H04R 7/12 (2006.01);
U.S. Cl.
CPC ...
H04R 9/06 (2013.01); H04R 7/127 (2013.01); H04R 9/025 (2013.01); H04R 9/045 (2013.01); H04R 9/046 (2013.01); H04R 9/063 (2013.01); H04R 2209/022 (2013.01); H04R 2209/024 (2013.01);
Abstract
An electro-acoustic transducer includes a diaphragm and an electro-magnetic motor that is coupled to the diaphragm. The motor includes a voice coil and a magnetic circuit that defines an air gap within which the voice coil is at least partially disposed. The magnetic circuit includes a first, axially polarized permanent magnet that provides a first magnetic flux path and a second, radially polarized permanent magnet that provides a second magnetic flux path. The first and second magnetic flux paths are arranged to interact with the voice coil to drive motion of the diaphragm.