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:
Apr. 15, 1986
Filed:
Dec. 04, 1984
Murray F Feller, Citrus County, FL (US);
Wilgood Corporation, Dunellon, FL (US);
Abstract
The disclosed flow sensor includes a pipe segment forming a flow passage, having vanes that cause the entering liquid to spiral in passing through a flow-detection zone. An orbital ball is captive in the zone, orbiting in proportion to the flow velocity. A localized capacitive flow detector and a companion capacitive electrode sense the orbiting of the ball. The capacitive electrodes are coupled to the frequency-determining portion of a feedback-stabilized oscillator whose output is modulated each time the ball travels past the sensing electrode. A feedback-stabilized oscillator having a sensing coil is similarly modulated by the effect of a vaned rotor moving past the coil. Different forms of feedback having a long-time-constant maintain high sensitivity of the oscillator to the effect of the flow-activated device.