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:
Jul. 04, 2017
Filed:
Oct. 28, 2014
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Masaki Onkawa, Konan, JP;
Shun Sakuma, Inuyama, JP;
Toru Iwano, Komaki, JP;
Tatsuhiko Muraoka, Komaki, JP;
Shigehiro Ohtsuka, Gifu, JP;
Masaki Mizutani, Niwa-gun, JP;
NGK SPARK PLUG CO., LTD., Nagoya, JP;
Abstract
A gas sensor element in an air/fuel ratio sensor includes an element body and a protection layer having two layers (a first layer and a second layer). The gas sensor element has at least one separation portion in the form of a space between the first layer and the second layer. The gas sensor element can temporarily accumulate, in the at least one separation portion, water which adheres to the surface of the protection layer and penetrates into the protection layer. Thus, as compared with a protection layer which is identical in thickness to the protection layer, but does not have separation portions, water adhering to the protection layer is less likely to reach the element body. Therefore, there can be restrained breakage of an end of the element body which could otherwise result from thermal shock stemming from adhesion of water.