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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.:

US 11293429 B1

PDFFull Text
Date of Patent:
Apr. 05, 2022

Filed:

Aug. 13, 2019

Fluid control device

Applicant:

Murata Manufacturing Co., Ltd., Kyoto, JP;

Inventors:

Kenjiro Okaguchi, Kyoto, JP;

Nobuhira Tanaka, Kyoto, JP;

Assignee:

MURATA MANUFACTURING CO., LTD., Kyoto, JP;

Attorney:

Pearne & Gordon LLP

Primary Examiner:

Connor J Tremarche

Int. Cl.
CPC ...
F04B 49/06 (2006.01); F04B 17/00 (2006.01); F04B 43/02 (2006.01); F04B 43/04 (2006.01); F04B 45/047 (2006.01); F04B 49/10 (2006.01);
U.S. Cl.
CPC ...
F04B 45/047 (2013.01); F04B 17/003 (2013.01); F04B 43/046 (2013.01); F04B 49/06 (2013.01); F04B 49/103 (2013.01);
Abstract

A fluid control device includes a piezoelectric pump having a piezoelectric element, a driving circuit that receives a driving power supply voltage applied thereto and drives the piezoelectric element, and a startup circuit disposed between the driving circuit and an input terminal for a power supply voltage. The startup circuit increases the driving power supply voltage to a voltage (V) lower than a constant voltage (Vc) in a first stage (P) after startup, maintains or decreases the driving power supply voltage in a second stage (P) following the first stage (P), and increases the driving power supply voltage to the constant voltage (Vc) in a third stage (P) following the second stage (P).

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