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:
Dec. 24, 1985
Filed:
Sep. 23, 1983
Applicant:
Inventors:
Brian J Burlage, Marshalltown, IA (US);
David E Wiklund, Marshalltown, IA (US);
Gary A Lenz, Marshalltown, IA (US);
Assignee:
Fisher Controls Company, Inc., Marshalltown, IA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01F / ; G01L / ; G01L / ;
U.S. Cl.
CPC ...
7386124 ; 73723 ; 73754 ; 73DI / ; 310338 ;
Abstract
A piezoelectric fluid pressure fluctuation frequency sensor, preferably for a vortex-shedding flowmeter. A piezoelectric transducer is located in a sensor chamber between and in physical contact with a diaphragm and a chamber surface. Pressure fluctuations in a von Karman vortex street outside the diaphragm compress the transducer, between the diaphragm and the chamber surface. The transducer generates a responsive electrical signal which is representative of the pressure fluctuations.