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:
Jun. 30, 2015
Filed:
Apr. 26, 2013
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Hiroyuki Suzuki, Kasugai, JP;
Akimitsu Sassa, Tokai, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A coupling member () of a glow plug () includes a first bend () and a second bend () folded in an axis direction OD and a joint section () in a tapered shape configured to connect the first bend with the second bend and reduce the diameter toward a rear end side of a body portion. Accordingly, in a limited space formed between a housing () and a heater unit (), this configuration increases the length of the coupling member (), compared with a configuration without any bend folded in the axis direction OD. This results in decreasing the spring constant k of the coupling memberand suppressing extension of the coupling memberin the axis direction due to thermal expansion.