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:
Jun. 04, 1996
Filed:
Nov. 18, 1994
Stephen F Grover, Libertyville, IL (US);
Scott A Ullrich, Des Plaines, IL (US);
Edward Montividas, Hanover Park, IL (US);
Frederico Chu, Glenview, IL (US);
Alnor Instrument Company, Skokie, IL (US);
Abstract
A fluid flow direction and velocity monitor, particularly useful in monitoring pressure differentials between a controlled environment and its surroundings, includes a heated thermal sensor situated between upstream and downstream cold thermal sensors within a channel. The heated thermal sensor provides a pressure differential or fluid flow velocity signal. The pair of cold thermal sensors are utilized to provide both temperature compensation and fluid flow direction. The pressure differential and direction signals are combined by the circuitry to yield a single digital direction and pressure signal.