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:
Jan. 19, 2010
Filed:
Nov. 21, 2005
Kiyotaka Yanagi, Ageo, JP;
Atsushi Koike, Ageo, JP;
Kiyotaka Yanagi, Ageo, JP;
Atsushi Koike, Ageo, JP;
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Abstract
A device for detecting leakage of liquid in a tank, in which, even if the liquid in the tank is a low viscosity liquid, degradation in flow rate measurement accuracy by an indirectly heated flow rate meter can be suppressed, so that a very fine amount of leakage can be accurately detected for a long period without degradation in detection accuracy. The liquid in the tank that is led in and out from a liquid lead-in/lead-out section () is lead in and out from the lower end of a measurement fine tube (″) positioned in the flow rate measurement section (). A measurement tube () of a liquid storage section () is connected to the upper end of the measurement fine tube. The measurement tube () has a larger cross-sectional area than the measurement fine tube. The device has a flow rate sensor section that is attached to the measurement fine tube and measures the flow rate of the liquid. The flow rate sensor section includes a heater () and temperature sensors (). The distance Lin the measurement fine tube measured from a position corresponding to the heater () to an upper end opening of the measurement fine tube is not less than 20 mm and not more than 45 mm.