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:
Apr. 22, 2008
Filed:
May. 18, 1999
Kaname Miwa, Aichi, JP;
Katsuhiko Horii, Aichi, JP;
Hideaki Yagi, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A flat limiting-current sensorincludes a solid electrolyte substrate, a negative electrodeand a positive electrode. The negative and positive electrodesand, respectively, are disposed on the same side of the solid electrolyte substrate. A voltage of 0.8 V is applied between the negative electrodeand the positive electrodein order to determine oxygen concentration. The ratio between the area of the negative electrodeand the area of the positive electrodeis set to 1:2, thereby reducing element resistance to 74% that of the case where the negative electrode and the positive electrode assume the same area. Thus, the measurement accuracy of the flat limiting-current sensoris improved.