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:
Nov. 18, 2014
Filed:
Nov. 23, 2011
Mathias Weber, Salzweg, DE;
Ewald Frasl, Biedermannsdorf, AT;
Mathias Weber, Salzweg, DE;
Ewald Frasl, Biedermannsdorf, AT;
Knowles IPC (M) Sdn. Bhd., Penang, MY;
Abstract
A loudspeaker comprises a voice coil and a diaphragm attached to the voice coil. The diaphragm has a generally rectangular outer shape, and comprises an outer rim (A) having an outer edge at which the diaphragm is fixed in position and an inner section (A) within the outer rim. The inner section (A) comprises: an outermost area (A) which is coupled to the voice coil and having the same generally rectangular outer shape; and an inner area (A) comprising a periodic rib structure (A), with the ribs running parallel to the shorter side of the rectangular outer shape, and two lateral transition areas (A) between the edges of the periodic rib structure (A) and the shorter side edges of outermost area (A).