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:
Oct. 12, 1993
Filed:
Dec. 30, 1991
Stephen J Kemp, St. Paul, MN (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A differential pressure sensor utilizing an opto-reflective sensor comprising a diaphragm with a top and a bottom, the diaphragm having an optical reflector mounted upon it. The diaphragm is mounted in a housing, wherein the housing has a first inlet port and a second inlet port, the first inlet port providing a first pressure to the top of the diaphragm and the second inlet port providing a second pressure to the bottom of the diaphragm. An opto-reflective sensor is mounted in the housing, wherein the opto-reflective sensor provides an optical signal to the optical reflector. The optical reflector reflects the signal back to the opto-reflective sensor, wherein the differential pressure sensor calculates the distance of the optical reflector from the opto-reflective sensor in relation to the relative intensity of the reflected optical signal. The differential pressure sensor then calculates the differential pressure between the first pressure and the second pressure based on the relative intensity of the reflected optical signal.