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:
Nov. 02, 1999
Filed:
Oct. 14, 1997
Kiyoshi Koyano, Yokohama, JP;
Yoshiko Usui, Yokohama, JP;
Tadashi Ikawa, Yokohama, JP;
Tokio Sugi, Tokyo, JP;
Tokyo Keiso Kabushiki-Kaisha, Tokyo, JP;
Kabushiki-Kaisha Izumi Giken, Kanagawa-ken, JP;
Abstract
An ultrasonic flow meter for determining the flow rate of fluid flowing through tubings. The ultrasonic flow meter comprises a measuring tube having a diameter constant in its entire length, and three ring shaped oscillators disposed longitudinally along the tube so as to intimately contact the inner peripheral surface thereof with the outer peripheral surface of the tube. The central oscillator of said three oscillators is energized by electric AC energy to generate an ultrasonic wave. The thus generated ultrasonic wave is detected by means of forward and rearward oscillators. The ultrasonic wave detected by the forward oscillator and that detected by the rearward oscillator are processed by means of a comparator to obtain the flow rate of the fluid flowing through the measuring tube.