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. 26, 1982
Filed:
Sep. 02, 1980
Louis J Daigle, Manchester, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
A flowmeter for measuring the mass flow of a fluid stream, such as air, in a duct includes a sensor and electronic circuitry. The sensor includes a drag surface mounted to or forming part of an oscillatory element and mounted in the fluid stream for flow-damped oscillation. The oscillatory element is stimulated by a drive transducer and a pickup transducer senses the flow-damped oscillations. An intermediate circuit terminates the drive at a certain peak amplitude and measures the time interval required for the amplitude of the flow-damped oscillations to decay a predetermined amount. That interval is indicative of the fluid mass flow. The sensor may be a cantilevered beam. The beam may also be disposed behind a shroud and include a drag plate extending upstream of the shroud therefrom. The sensor may be a beam constrained to torsional oscillation about a longitudinal axis. The transducers are piezoelectric devices mounted on a beam in proximity with its neutral axis.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile