发明名称 |
Spark plug and method of manufacturing the same |
摘要 |
A spark plug capable of increasing a welding strength between a leading end of a metal shell and a base end of a ground electrode to avoid fracture of a welded part due to vibrations and the like even when making the metal shell smaller. The spark plug satisfies a relation of S2≧S wherein S2 is a sectional area of the welded part between the metal shell and the ground electrode, the sectional area S2 being cut off by a plane including a leading end surface of the metal shell, and S is a sectional area of the ground electrode, the sectional area S being cut off by a plane passing to the most axial leading end of a boundary between the ground electrode and the welded part and perpendicular to the axial direction. |
申请公布号 |
US8207657(B2) |
申请公布日期 |
2012.06.26 |
申请号 |
US200913124869 |
申请日期 |
2009.11.04 |
申请人 |
SUZUKI AKIRA;MUSASA MAMORU;NGK SPARK PLUG CO., LTD. |
发明人 |
SUZUKI AKIRA;MUSASA MAMORU |
分类号 |
H01T13/00;H01T13/20;H01T21/00 |
主分类号 |
H01T13/00 |
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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