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. 13, 1990
Filed:
Sep. 01, 1987
Toshitaka Saito, Toyohashi, JP;
Hiromi Sano, Nagoya, JP;
Soji Ota, Nagoya, JP;
Syohei Udo, Anjo, JP;
Nippondenso Co., Ltd., Kariva, JP;
Abstract
Outer air serving as a reference gas for determining oxygen concentration is guided to a hollow portion of a core. The core is formed in an insulating cylinder whose distal end is closed and whose proximal end is open to receive the reference gas. An opening is formed on the outer surface of the core, to communicate with the hollow portion. An oxygen concentration sensor element made of a solid-state electrolyte layer having first and second electrode layers one on each surface thereof is mounted such that it closes the opening. A sheet member made of an insulating sheet is wound around the sensor element mounted on the sensor element, and is fixed thereon. A window is formed in the sheet so as to expose the surface of the sensor element. A heater is formed around the window. Wiring layers respectively connected to both terminals of the heater are formed on the sheet. Wiring layers adapted to contact the first and second electrode layers of the sensor element are also formed on the sheet. The four wiring layers are respectively guided to grooves formed in the outer surface of the proximal end of the core. A protective layer in the form of a porous insulator is formed on the outer surface of the sheet member.