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:
May. 15, 1990
Filed:
May. 19, 1989
Yutaka Inada, Tokyo, JP;
Kazumasa Kawasaki, Kanagawa, JP;
Shigeru Nishiyama, Kanagawa, JP;
Hiroshi Yoshikura, Kanagawa, JP;
Tokico Ltd., Kanagawa, JP;
Abstract
A vortex flowmeter comprising ultrasonic wave transmitters and ultrasonic wave receivers adapted to receive ultrasonic waves transmitted by the transmitters through a flow of fluid in which vortices are generated by a vortex generator, the ultrasonic wave signals output by the ultrasonic wave receivers being compared by a phase comparator to measure the flow rate of the fluid by detecting the difference in phase of the ultrasonic waves due to generation of the vortices. First and second ultrasonic wave transmitters are disposed on the wall of a pipe line defining the flow path for the fluid downstream of the vortex generator and first and second ultrasonic wave receivers are respectively disposed at positions on the wall of the pipe line opposite to the first and second transmitters and in such a manner that the first propagation route for the ultrasonic waves propagating from the first ultrasonic wave transmitter to the first ultrasonic wave receiver and the second propagation route for ultrasonic waves propagating from the second ultrasonic wave transmitter to the second ultrasonic wave receiver intersect each other and extend in opposite directions. The phase of the respective ultrasonic wave signals output by the first and second ultrasonic wave receivers are compared by a phase comparator so that the vortices generated by the vortex generator can be detected.