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:
Mar. 10, 1987
Filed:
Jan. 29, 1986
Applicant:
Inventors:
Assignee:
Fuji Electric Co., Ltd., Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
7386124 ;
Abstract
Various forms of Karman vortex generators are used for flowmeters in which the vortices generated are used to create pressure differences on opposite sides of a vibrator plate whose frequency of rotation is measured optically as a measure of the fluid flow. One form of flowmeter, used to measure the quantity of air inhaled by an internal combustion engine, uses a chamber outside the path of the inhaled gas which is maintained at a negative pressure and which communicates both with the air line and outside air such that clean air is drawn in to keep the optics enclosed therein clean.