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:
Jan. 17, 1995
Filed:
Apr. 06, 1992
Applicant:
Inventor:
Paris H Wiley, Tampa, FL (US);
Assignee:
Onicon Inc., Clearwater, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F / ; G01F / ;
U.S. Cl.
CPC ...
7386177 ; 7386175 ; 34087037 ;
Abstract
The disclosed flow monitoring apparatus has a flow-varied sensing capacitance and an inductor in a series-resonant circuit that modulates the frequency of an oscillator. In one apparatus, the sensing capacitance comprises a flow-activated vaned rotor whose blades sweep past a very small capacitive sensing electrode, for monitoring flow rates. In other apparatus a flow-activated blade is biased to remain opposite a very small capacitive sensing electrode, to provide on/off flow indication.