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:
Sep. 15, 2015
Filed:
Dec. 14, 2010
Masatake Takahashi, Tokyo, JP;
Yasuharu Onishi, Tokyo, JP;
Yasuhiro Sasaki, Tokyo, JP;
Shigeki Shinoda, Tokyo, JP;
Junichiro Mataga, Tokyo, JP;
Ukyo Mori, Tokyo, JP;
Jun Kuroda, Tokyo, JP;
Yukio Murata, Tokyo, JP;
Masatake Takahashi, Tokyo, JP;
Yasuharu Onishi, Tokyo, JP;
Yasuhiro Sasaki, Tokyo, JP;
Shigeki Shinoda, Tokyo, JP;
Junichiro Mataga, Tokyo, JP;
Ukyo Mori, Tokyo, JP;
Jun Kuroda, Tokyo, JP;
Yukio Murata, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A viscoelastic body is interposed between a vibrating membrane vibrating in association with a piezoelectric vibrator composed of a piezoelectric element and a base and a support member supporting the vibrating membrane. The viscoelastic body attenuates vibration transmitted from the support member to the vibrating membrane and converts vibration of the vibrating membrane in the surface direction parallel to its main surfaces to vibration of the vibrating membrane in the direction nearly perpendicular to the surface direction. The vibrating membrane is annular with an opening at the center, and the base is joined to the vibrating membrane coaxially with opening.