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. 20, 2018
Filed:
Apr. 18, 2013
Ngk Spark Plug Co., Ltd., Nagoya, Aichi, JP;
Shunsuke Maeda, Duesseldorf, DE;
Yoshihiro Nakamura, Iwakura, JP;
Masahiro Kawakatsu, Komaki, JP;
Hiroyuki Suzuki, Kasugai, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A glow plug () includes: a housing () having a metal shell () and a cap unit (); and a heater unit (). A coupling member () is joined with the housing () and is also joined with the heater unit () at its edge portion (), so as to enable the heater unit () to move along an axis line O and couple the heater unit () with the housing (). When the edge portionof the coupling memberis irradiated with a laser, at least part of the edge portion () melted by laser welding fills a gap () between the coupling member () and the heater unit () to form a welded part (). As a result, even when there is a gap prior to welding, the weld strength between the coupling member () and the heater unit () can be maintained.