| 发明名称 |
SPARK PLUG AND MANUFACTURING METHOD THEREOF |
| 摘要 |
<p>There is provided a spark plug 100 with a ground electrode 30, wherein a protrusion amount A of a protruding portion 36 satisfies a relationship of 0.4 mm ‰¤ A ‰¤ 1.0 mm and wherein a width B from a front end surface 31 to a press recessed portion 37 satisfies a relationship of 0.4 mm ‰¤ B ‰¤ 2.5 mm.</p> |
| 申请公布号 |
EP2339704(A1) |
申请公布日期 |
2011.06.29 |
| 申请号 |
EP20090820414 |
申请日期 |
2009.10.09 |
| 申请人 |
NGK SPARKPLUG CO., LTD. |
发明人 |
NAKAYAMA, KATSUTOSHI;KATSURAYA, KOHEI |
| 分类号 |
H01T13/32;H01T13/20;H01T21/02 |
主分类号 |
H01T13/32 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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