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:
May. 25, 2010
Filed:
Sep. 10, 2004
Shinichi Inoue, Ageo, JP;
Akiko Kubota, Ageo, JP;
Takayuki Takahata, Ageo, JP;
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Abstract
A urea concentration identification device comprising a concentration identification sensor unit () and a support unit () attached at the bottom end thereof with this sensor unit and provided at the top end thereof with a mounting unit () to a urea solution tank opening. The concentration identification sensor unit () has an indirectly-heated concentration detector and liquid temperature detector provided with metal fins (),(), respectively, for heat-exchanging with urea solution. The concentration identification sensor unit () is provided with a cover member () that forms an opposite-ends-opened urea solution induction passage so as to surround the metal fins (), (). A single-pulse voltage is applied to the heating element of the indirectly-heated concentration detector to heat it, and a urea concentration is identified at an identification operation unit based on an output from a concentration detection circuit including the temperature sensing element of the indirectly-heated concentration detector and the liquid temperature detector.