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. 10, 2007
Filed:
Nov. 21, 2003
Applicants:
David Earl Schafer, Glen Ellyn, IL (US);
Mekell Jiles, South Holland, IL (US);
Inventors:
David Earl Schafer, Glen Ellyn, IL (US);
Mekell Jiles, South Holland, IL (US);
Assignee:
Knowles Electronics, LLC., Itasca, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A paddle () of a diaphragm () of a receiver () is manufactured using one or more layers of a material selected for their inertial mass and rigidity. The paddle may have a layered structure with stiff outer layers such as aluminum and a less dense inner layer, such as thermoplastic adhesive. The inner and outer layers are selected to give an inertial mass matching that of an armature () of the receiver () and to give a lowest frequency bending resonance above a desired range, for example, 14 KHz.