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. 21, 1989
Filed:
Feb. 19, 1988
Arthur R Brown, Warrenville, IL (US);
David C Miller, Downers Grove, IL (US);
Amoco Corporation, Chicago, IL (US);
Abstract
An interface determining device includes a casing positioned in an above ground storage tank and apparatus is provided for establishing a clean interface in the casing between the liquid product in the tank and water in the tank. Also, a leak detector including a sensor assembly comprising an array of conductivity sensors for sensing conductivity mounted in a casing is positioned at the bottom of an above ground storage tank. Apparatus is provided for establishing a clean interface between the liquid product and water within the casing. The casing in the interface detecting device or the leak detector casing is completely enclosed except for an opening in the top of the casing for the entry or escape of liquid product into or out of the casing. The apparatus for establishing a clean interface includes a normally closed water inlet/outlet system at the bottom of the casing and a mechanism for opening and closing the water inlet/outlet system.