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:
Jan. 05, 2021
Filed:
Jun. 12, 2018
Ngk Spark Plug Co., Ltd., Nagoya, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A plate-shaped sensor element () including at least a first layer (), a second layer (), and a third layer () being stacked in a stacking direction. The first layer and the third layer are mainly formed of ceramic. The second layer is disposed between the first layer and the third layer in the stacking direction. The second layer has an air introduction hole () opened at an end surface. In a cross-section perpendicular to a direction of an axis O, a length Lof a shortest line segment Pconnecting an upper end surface () of the sensor element and the centroid Gof the sensor element and a length Lof a shortest line segment Pconnecting the upper end surface of the sensor element and the centroid Gof the air introduction hole, satisfy a relationship of |L−L|/L≤0.05.