发明名称 |
Method of producing a spark plug |
摘要 |
In a spark plug in which a space between a center electrode at the top end side and a terminal electrode at a rear end side which are arranged to be opposite to each other in an axial hole of an insulator, the glass seal is effected at a temperature within the range of 500 to 1000° C. and under a condition where the concentration of oxygen is 4-12 vol %.
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申请公布号 |
US6341501(B2) |
申请公布日期 |
2002.01.29 |
申请号 |
US19970927196 |
申请日期 |
1997.09.11 |
申请人 |
NGK SPARK PLUG CO., LTD. |
发明人 |
SUGIMOTO MAKOTO;TANAKA YUTAKA |
分类号 |
H01T13/20;H01T13/34;H01T13/38;H01T21/02;(IPC1-7):C03C27/02;C03C27/04 |
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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