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:
Jul. 31, 1984
Filed:
Jun. 14, 1982
Murray F Feller, Dunnellon, FL (US);
Wilgood Corporation, Dunnellon, FL (US);
Abstract
Disclosed acoustic flow sensors include a cylindrical wall that forms a cylindrical flow passage, a flow activated rotor in the passage, and an electrical generator for developing flow-representing signals. In probe type flow sensors, the cylindrical wall is a shroud surrounding the rotor and forming a flow metering passage within a larger main passage, and the disclosed one or two piezoelectric device is/are decoupled from the fluid outside the shroud by sound-deadening material and coupled to the fluid within the shroud. For both probe-type flow sensors, and in-line flow sensors, the cylindrical wall is stressed and subjected to arcuate dimension change by piezoelectric device(s) of the radial-mode type bonded to the cylindrical wall.