Invention Grant
US08237343B2 Spark plug having a metal fitting portion for holding an insulator at a portion opposite a tip end
有权
火花塞具有用于在与尖端相对的部分处保持绝缘体的金属配合部分
- Patent Title: Spark plug having a metal fitting portion for holding an insulator at a portion opposite a tip end
- Patent Title (中): 火花塞具有用于在与尖端相对的部分处保持绝缘体的金属配合部分
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Application No.: US12064423Application Date: 2006-08-22
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Publication No.: US08237343B2Publication Date: 2012-08-07
- Inventor: Nobuyuki Hotta , Eiji Kodera , Kazushige Ohbayashi , Noriyasu Sugimoto
- Applicant: Nobuyuki Hotta , Eiji Kodera , Kazushige Ohbayashi , Noriyasu Sugimoto
- Applicant Address: JP Aichi
- Assignee: NGK Spark Plug Co., Ltd.
- Current Assignee: NGK Spark Plug Co., Ltd.
- Current Assignee Address: JP Aichi
- Agency: Sughrue Mion, PLLC
- Priority: JP2005-239884 20050822; JP2005-239885 20050822; JP2005-239886 20050822; JP2005-239887 20050822; JP2005-256173 20050905; JP2006-102850 20060404; JP2006-136778 20060516
- International Application: PCT/JP2006/316374 WO 20060822
- International Announcement: WO2007/023790 WO 20070301
- Main IPC: H01T13/02
- IPC: H01T13/02
Abstract:
Provided is a spark plug that includes a center electrode extending in an axial direction, a cylindrical insulator that holds the center electrode, and a cylindrical main metal fitting, which has a ground electrode at a tip portion thereof. The cylindrical main metal fitting includes a tool engagement portion for mounting the spark plug to an engine and a metal fitting-side fitting portion provided at a rear side of the main metal fitting opposite from the tip portion. The metal fitting-side fitting portion holds the insulator in a tightly fitted state in a radial direction.
Public/Granted literature
- US20090102345A1 SPARK PLUG Public/Granted day:2009-04-23
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