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:
Sep. 27, 1988
Filed:
Apr. 17, 1987
Akira Tanaka, Saitama, JP;
Norimitsu Kurihara, Saitama, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A Karman vortex flowmeter has a column inserted in the fluid passage to produce a Karman vortex street corresponding to the velocity of a fluid and for measuring the flow rate of the fluid by making use of the variations in the pressure caused by the production of the Karman vortex street. A metal sheet member consists of a magnetic substance and includes a vibrating plate portion that is divided into two portions. Pressure transfer means in the column transmit the variations in the pressure to the vibrating plate portion for causing vibration at a rate related to the fluid flow rate. Two magnets are disposed to magnetize the two portions of the vibrating plate portion to different polarities, according to the direction of the vibration of the vibrating plate portion as caused by the variations in the pressure and a detecting means detects the inversion of the direction of the magnetic flux in the magnetic circuit formed by magnetization of the metal sheet member to find the flow rate of the fluid, the inversion being caused by the inversion of the direction of vibration of the vibrating plate portion.