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. 01, 2008
Filed:
Oct. 14, 2004
Applicants:
Ryo Kuribayashi, Matsusaka, JP;
Shinsaku Sawa, Matsusaka, JP;
Inventors:
Ryo Kuribayashi, Matsusaka, JP;
Shinsaku Sawa, Matsusaka, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 25/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a diaphragm for a loudspeaker which suppresses divided resonance and shows a stable sound-pressure-frequency characteristic, and a loudspeaker using the diaphragm. The diaphragm includes three or more thick parts () of odd numbers formed radially from a center part to an outer periphery, and semi thick part () formed between the thick parts so as to become thinner gradually from the outer periphery to the center part. Web shaped thin part () is formed at an inner part of the semi thick part.