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:
Dec. 26, 2023
Filed:
Jul. 29, 2020
Murata Manufacturing Co., Ltd., Kyoto, JP;
Nobuhira Tanaka, Kyoto, JP;
Kenjiro Okaguchi, Kyoto, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A fluid control apparatus includes a piezoelectric pump, a pressure vessel, an input unit, a drive control unit, and a driving circuit. The piezoelectric pump has a pump chamber whose volume fluctuates due to displacement of a piezoelectric element, a valve chamber communicated with the pump chamber and has a valve diaphragm, a pump chamber opening that allows the pump chamber to be communicated with an outside of the pump chamber, and a valve chamber opening that allows the valve chamber communicate with an outside of the valve chamber. The pressure vessel is communicated with the valve chamber. The driving circuit drives the piezoelectric element upon application of a driving power-supply voltage from the drive control unit. The drive control unit adjusts the driving power-supply voltage or a driving current corresponding to the driving power-supply voltage in accordance with a vibration state of the valve diaphragm.