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:
Feb. 14, 2006
Filed:
Nov. 22, 2002
Masaki Iwaya, Gifu, JP;
Masahiko Nishi, Aichi, JP;
Takaaki Chosokabe, Aichi, JP;
Masaru Hayakawa, Aichi, JP;
Masaki Iwaya, Gifu, JP;
Masahiko Nishi, Aichi, JP;
Takaaki Chosokabe, Aichi, JP;
Masaru Hayakawa, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A cylindrical metal tube () accommodating therein a thermistor device (), the electric characteristics of which change with temperature, is pushed into, or clamped and fixed to, a sheath portion () positioned on a flange () to the rear of a projection portion () of the flange (), and is laser welded in a circumferential direction. A weld portion (L) formed to bridge the metal tube () and the sheath portion () of the flange () firmly fixes the metal tube () to the flange (). In the temperature sensor () having this construction, the weld portion (L) between the metal tube () and the flange () is not exposed to a high temperature environment. Therefore, oxidation hardly occurs at the weld portion and reliability of air tightness to an exhaust gas can be improved.