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. 11, 1988
Filed:
Dec. 22, 1987
Stanley C Jones, Littleton, CO (US);
Marathon Oil Company, Findlay, OH (US);
Abstract
A low range differential pressure transducer is connected in a closed fluid system which also contains a U-tube filled with oil in its upper portion and mercury in its lower portion. Under conditions of high line pressure similar quantities of oil are displaced within the closed system from one arm of the U-tube to the other, causing the mercury in the latter arm to be forced down while rising in the other arm. The difference in height between the levels of mercury is used in calculating the differential pressure. By connecting a number of U-tubes in series the cumulative differences between the levels of mercury in the arms of each U-tube can be used in calculating the differential pressure for a transducer designed to measure differential pressure over a wider range of low pressures.