Invention Grant
- Patent Title: Spark plug having stress corrosion cracking resistance
- Patent Title (中): 火花塞具有抗应力腐蚀开裂性
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Application No.: US13818719Application Date: 2011-04-12
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Publication No.: US08716924B2Publication Date: 2014-05-06
- Inventor: Hiroaki Nasu , Makoto Sugita , Akito Sato , Shingo Kuwahara
- Applicant: Hiroaki Nasu , Makoto Sugita , Akito Sato , Shingo Kuwahara
- Applicant Address: JP
- Assignee: NGK Spark Plug Co., Ltd.
- Current Assignee: NGK Spark Plug Co., Ltd.
- Current Assignee Address: JP
- Agency: Kusner & Jaffe
- Priority: JP2010-189069 20100826
- International Application: PCT/JP2011/002158 WO 20110412
- International Announcement: WO2012/026049 WO 20120301
- Main IPC: H01T13/39
- IPC: H01T13/39
Abstract:
A spark plug having a metallic shell covered with a nickel plating layer and having a groove portion formed between a tool engagement portion and a gas seal portion and having an orthogonal-to-axis sectional area of 36 mm2 or less.
Public/Granted literature
- US20130154468A1 SPARK PLUG Public/Granted day:2013-06-20
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