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:
Mar. 05, 1985
Filed:
Sep. 14, 1982
Carl S Dudash, Enfield, CT (US);
Brian G Donnelly, West Suffield, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
A pressure measuring device is provided with an indicator such as a bourdon tube (10) for indicating the absolute value of the difference in pressure between fluids applied to the indicator through first and second conduits (15) and (20). Valve means (25) including an element (100) actuable in response to the pressure in conduits (15) and (20) consistently applies the higher pressure fluid to that portion of the indicator adapted to receive such higher pressure fluid and the lower pressure fluid to that portion of the indicator adapted to receive the lower pressure fluid. Optical means such as transmitter (115) and receiver (120) are provided for indication of the sign (positive or negative) of the pressure difference.