公开(公告)号：US09225150B2

公开(公告)日：2015-12-29

申请号：US14412118

申请日：2013-07-16

Applicant: NGK Spark Plug Co., LTD.

Inventor： Masahiro Nishida ,  Tomoaki Kato ,  Keiji Ozeki ,  Naoyuki Mukouyama ,  Tsutomu Kobayashi

IPC: F02M57/06 ,  F02P13/00 ,  H01T13/00 ,  H01T13/36 ,  H01B3/12

CPC classification number: H01T13/36 ,  H01B3/12

Abstract: A spark plug includes an insulator including an axial hole and having an outer periphery with a tapered outer face; a metal shell having a thread portion and a tapered inner face; and a circular packing sandwiched between the tapered outer face of the insulator and the tapered inner face of the metal shell. On at least one cross section including the axis, (A/B)≧3.1, B≧0.25, and (A+B)≦2.0 are satisfied, where A represents a length of (a difference between an effective diameter of the thread portion and an inner diameter at a rear end of the tapered inner face)/2, and B represents a length of (a difference between the inner diameter at the rear end of the tapered inner face and an inner diameter at a front end of the tapered inner face)/2.

Abstract translation: 火花塞包括：具有轴向孔的绝缘体，外周具有锥形的外表面; 具有螺纹部分和锥形内表面的金属壳体; 以及夹在绝缘体的锥形外表面和金属外壳的锥形内表面之间的圆形填料。 在包括轴线（A / B）≥3.1，B≥0.25和（A + B）＆nlE; 2.0）的至少一个横截面满足的情况下，其中A表示螺纹的有效直径之间的差 部分和锥形内表面后端的内径）/ 2，B表示锥形内表面的后端的内径与前端的内径之间的差 锥形内表面）/ 2。

公开(公告)号：US20150188294A1

公开(公告)日：2015-07-02

申请号：US14412118

申请日：2013-07-16

Applicant: NGK Spark Plug Co., LTD.

Inventor： Masahiro Nishida ,  Tomoaki Kato ,  Keiji Ozeki ,  Naoyuki Mukouyama ,  Tsutomu Kobayashi

IPC: H01T13/36 ,  H01B3/12

CPC classification number: H01T13/36 ,  H01B3/12

Abstract: A spark plug includes an insulator including an axial hole and having an outer periphery with a tapered outer face; a metal shell having a thread portion and a tapered inner face; and a circular packing sandwiched between the tapered outer face of the insulator and the tapered inner face of the metal shell. On at least one cross section including the axis, (A/B)≧3.1, B≧0.25, and (A+B)≦2.0 are satisfied, where A represents a length of (a difference between an effective diameter of the thread portion and an inner diameter at a rear end of the tapered inner face)/2, and B represents a length of (a difference between the inner diameter at the rear end of the tapered inner face and an inner diameter at a front end of the tapered inner face)/2.

Abstract translation: 火花塞包括：具有轴向孔的绝缘体，外周具有锥形的外表面; 具有螺纹部分和锥形内表面的金属壳体; 以及夹在绝缘体的锥形外表面和金属外壳的锥形内表面之间的圆形填料。 在包括轴线（A / B）≥3.1，B≥0.25和（A + B）＆nlE; 2.0）的至少一个横截面满足的情况下，其中A表示螺纹的有效直径之间的差 部分和锥形内表面后端的内径）/ 2，B表示锥形内表面的后端的内径与前端的内径之间的差 锥形内表面）/ 2。