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:
Aug. 04, 2020
Filed:
Jan. 24, 2018
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Daisuke Tahira, Komaki, JP;
Shingo Ito, Ichinomiya, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A gas sensor () includes a sensor element (), a metallic shell (), a powder filler member (), a first ceramic holder () in contact with the rear end of the powder filler member and from which the sensor element protrudes, and a second ceramic holder () in contact with the forward end of the powder filler member and from which the sensor element protrudes. The powder filler member has a higher thermal expansion coefficient than that of the first and second ceramic holders. The first ceramic holder, powder filler member, and second ceramic holder are pressed by force application means (). A relation 0.40<(L−M)/L<0.58 holds, where L is the axial distance between the rearward-facing surface of the first ceramic holder and the forward end of the second ceramic holder, and M is the axial length of the powder filler member.