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:
Jan. 30, 2024
Filed:
Feb. 13, 2020
Polk Audio, Llc, Vista, CA (US);
Sean O'Brien, Sr., Harwood, MD (US);
Polk Audio, LLC, Carlsbad, CA (US);
Abstract
A loudspeaker driver or tweeter (e.g.,or) having a voice coil connected with a loudspeaker diaphragm (e.g.,or), having a substantially circular diaphragm portion which is connected with or rests upon a voice coil attachment segment (e.g.,). The diaphragm also includes a first central elliptical (non-circular-shaped) inner roll portion (e.g.,) defining a central recessed area and a second, outer elliptical (non-circular-shaped) roll portion (e.g.,) so the central portion and the outer roll portion that have substantially elliptical edge circumferences with substantially circular central peripheral edges to define diaphragm segments with a varying radial Chord lengths having non-uniform diameter dimensions (inside diameter to outside diameter) and when in use, the excursion of the diaphragm is controlled such that any breakup modes are minimized and the associated resonances are minimized.