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:
May. 09, 2006
Filed:
Jun. 12, 2002
Chiaki Kumada, Gifu, JP;
Shunsuke Gotou, Ichinomiya, JP;
Chiaki Kumada, Gifu, JP;
Shunsuke Gotou, Ichinomiya, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
To provide a glow plug capable of speedily increasing the temperature, a glow plug mounting structure, and a process for manufacturing the glow plug. In the invention, the glow plug () comprises: a cylindrical sheath tube () closed at its front endS) and opened at its base end (K); a cylindrical metal shell () covering the side of the base end (K); a heating coil () arranged in the sheath tube () along the axis thereof and connected at its front end portion (S) to the front end (S) of the sheath tube (); and insulating powder () packed in the sheath tube (). The front end side portion (H) of the heating coil () farther than the foremost end (T) of the lead member () has a coil length not larger than 15 mm in the axial direction from the front end (S) of the sheath tube (). The sheath front end portion (C) enclosing the front end side portion (H) has an outer diameter not larger than 4.4 mm.