发明授权
- 专利标题: Spark plug
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申请号: US16472275申请日: 2017-09-05
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公开(公告)号: US10601202B2公开(公告)日: 2020-03-24
- 发明人: Kengo Fujimura , Kimihiro Nishizono , Hiroki Ota
- 申请人: NGK SPARK PLUG CO., LTD.
- 申请人地址: JP Nagoya-shi, Aichi
- 专利权人: NGK SPARK PLUG CO., LTD.
- 当前专利权人: NGK SPARK PLUG CO., LTD.
- 当前专利权人地址: JP Nagoya-shi, Aichi
- 代理机构: Kusner & Jaffe
- 优先权: JP2016-253243 20161227
- 国际申请: PCT/JP2017/031948 WO 20170905
- 国际公布: WO2018/123146 WO 20180705
- 主分类号: H01T13/20
- IPC分类号: H01T13/20 ; H01T13/02
摘要:
A spark plug enabling suppression of reduction in the strength of an insulator. In the spark plug, a rear end portion of an engagement portion formed on an outer peripheral surface of a tubular insulator extending along an axial line from a front side to a rear side, is engaged with a to-be-engaged portion of a tubular metal shell disposed on the outer peripheral surface of the insulator. The insulator is made from ceramic such as alumina. On at least a part of the outer peripheral surface of the insulator, a projected and recessed portion is formed on the front side relative to the engagement portion so as to helically extend in a circumferential direction of the insulator.
公开/授权文献
- US20190326733A1 SPARK PLUG 公开/授权日:2019-10-24
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