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:
Apr. 07, 1998
Filed:
Aug. 22, 1996
Tokico Ltd., Kanagawa-ken, JP;
Abstract
In a Karman vortex flowmeter according to the present invention, first and second ultrasonic transmission/reception devices are offset from each other along a flowing direction of fluid, and a switching device alternately switches the ultrasonic transmission/reception devices so that the ultrasonic transmission/reception devices can alternately perform transmission and reception. There is also provided a propagation time difference detector for determining a time difference between an ultrasonic wave propagation time when one of the ultrasonic transmission/reception devices performs the transmission, and an ultrasonic wave propagation time when the other of the ultrasonic transmission/reception devices performs the transmission, and for determining a flow rate of the fluid on the basis of the time difference. When no Karman vortex is generated or when the number of generated Karman vortices is greatly reduced, the minute flow rate of the fluid is measured by the propagation time difference detector.