发明名称 |
Spark plug for internal combustion engine |
摘要 |
A spark plug for an internal combustion engine with both sides of a surface, on a center electrode side, of an outer electrode and/or both side portions, on the top surface of the center electrode, form wedge-shaped projections. At least one surface having the wedge-shaped projection has no plane surface but is arcuate.
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申请公布号 |
US4288714(A) |
申请公布日期 |
1981.09.08 |
申请号 |
US19790045888 |
申请日期 |
1979.06.06 |
申请人 |
NGK SPARK PLUG CO., LTD. |
发明人 |
YAMADA, SHIGEYASU;KAWAMURA, KAZUMI;NAKAMURA, SHUJI |
分类号 |
H01T13/20;(IPC1-7):H01T13/32 |
主分类号 |
H01T13/20 |
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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