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US07772751B2 Spark plug having a rear-end portion of a threaded portion that has a higher hardness than a crimp portion and method of manufacturing the same 有权
具有螺纹部分的后端部分的火花塞具有比卷曲部分更高的硬度及其制造方法

  • 专利标题： Spark plug having a rear-end portion of a threaded portion that has a higher hardness than a crimp portion and method of manufacturing the same
  • 专利标题（中）： 具有螺纹部分的后端部分的火花塞具有比卷曲部分更高的硬度及其制造方法
  • 申请号： US11716617
    申请日： 2007-03-12
  • 公开(公告)号： US07772751B2
    公开(公告)日： 2010-08-10
  • 发明人: Akira Suzuki , Takahiro Suzuki
  • 申请人： Akira Suzuki , Takahiro Suzuki
  • 申请人地址： JP 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 Aichi
  • 代理机构： Sughrue Mion, PLLC
  • 优先权： JP2006-066911 20060313
  • 主分类号： H01T13/00
  • IPC分类号： H01T13/00
Spark plug having a rear-end portion of a threaded portion that has a higher hardness than a crimp portion and method of manufacturing the same
摘要：
A spark plug and method of manufacturing the same, the spark plug including a metal housing holding an insulator therein, the metal housing having a threaded portion formed on an outer circumferential surface of a frontward portion of the metal housing in a crimp portion formed at a rear end of the metal housing and crimping the insulator in the axial hole of the metal housing. Furthermore, the rear-end portion of the threaded portion has a hardness that is higher than that of the crimp portion.
摘要（中）：

一种火花塞及其制造方法，所述火花塞包括金属壳体，所述金属壳体保持绝缘体，所述金属壳体具有螺纹部，所述螺纹部形成在所述金属壳体的前部的外周面上，形成在所述压接部 金属外壳的后端并将绝缘体压接在金属外壳的轴向孔中。 此外，螺纹部的后端部具有比压接部高的硬度。

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