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. 27, 2012
Filed:
May. 07, 2009
Souichi Takigawa, Hamamatsu, JP;
Yoshikatsu Matsubara, Hamamatsu, JP;
Masahiro Sugiura, Hamamatsu, JP;
Yasuaki Takano, Kikugawa, JP;
Souichi Takigawa, Hamamatsu, JP;
Yoshikatsu Matsubara, Hamamatsu, JP;
Masahiro Sugiura, Hamamatsu, JP;
Yasuaki Takano, Kikugawa, JP;
Yamaha Corporation, Hamamatsu-Shi, JP;
Abstract
An external inserting meatus of user is closed with an insert earphone device in use so that it is hard that external sound penetrates into the external inserting meatus; not only an internal sound propagation path but also an external sound propagation path are formed in an inserting body of the earphone device, and an active diaphragm is provided in the inserting body so as to make the external sound propagation path closed therewith and block the external auditory meatus from the external sound; the active diaphragm is formed from electroactive polymer layer sandwiched between electrodes, and the active diaphragm is deformed in the presence of voltage so as permit the user easily to control it.