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:
Mar. 05, 2019
Filed:
Sep. 07, 2016
Murata Manufacturing Co., Ltd., Kyoto, JP;
Nobuhira Tanaka, Kyoto, JP;
Hiroyuki Yokoi, Kyoto, JP;
Masahiro Sasaki, Kyoto, JP;
Kiyoshi Kurihara, Kyoto, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A piezoelectric blower () includes a housing (), a vibrating plate (), and a piezoelectric element (). The vibrating plate () forms a column-shaped blower chamber () together with the housing (). The vibrating plate () and the housing () are formed so that the blower chamber () has a radius a. The piezoelectric element () causes the vibrating plate () to concentrically bend and vibrate at a resonance frequency f. A recessed portion () is formed in the housing () on the side facing the vibrating plate (). The recessed portion () defines a cavity (), which constitutes the blower chamber () and communicates with the vent hole (). The radius a of the blower chamber () and the resonance frequency f of the vibrating plate () satisfy a relationship of 0.8×(kc)/(2π)≤af≤1.2×(kc)/(2π).