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:
Aug. 09, 2005
Filed:
Apr. 25, 2003
Takehiko Suginouchi, Nara, JP;
Masahiko Hashimoto, Shijonawate, JP;
Takehiko Suginouchi, Nara, JP;
Masahiko Hashimoto, Shijonawate, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An ultrasonic flowmeter arranged to perform measurement with high accuracy has first and second ultrasonic transducerswhich transmit and receive ultrasonic waves, and which are placed so as to form a path for propagation of the ultrasonic waves in a flow passagefor a fluid, a transmitting sectionwhich drives one of said first and second ultrasonic transducersa first matching sectionwhich is connected to the transmitting section, and which adjusts the output impedance of the transmitting section, and a receiving sectionwhich has an input impedance approximately equal to or lower than the adjusted output impedance, and which receives the ultrasonic wave reaching the other of the first and second ultrasonic transducers. The flow volume of the fluid is measured by detecting a bidirectional-propagation time difference between the ultrasonic waves propagating in the propagation path.