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:
Apr. 30, 2024
Filed:
Jul. 29, 2020
Polk Audio Llc, Carlsbad, CA (US);
Sean O'Brien, Harwood, MD (US);
Stuart W. Lumsden, Baltimore, MD (US);
Polk Audio, LLC, Carlsbad, CA (US);
Abstract
A loudspeaker transducer diaphragm or cone (e.g.,or) is configured with arcuate protrusions that project distally from the main forward or distal surfaceto provide stiffening and a break-up of resonant vibration modes when the loudspeaker is in use. The protrusions (e.g.,or) are convex on one surfaceand concave on the opposite surface, so their average thickness is similar to the frustoconical areas of the cone, i.e. they are shell-like in nature rather than solid mounds or walls. The protrusionsare generally curved as they run radially from the inner openingto the outer peripheral edge to encourage modal break-up (suppressing strong vibrational modes, e.g., as in region).