公开(公告)号：US20220166196A1

公开(公告)日：2022-05-26

申请号：US17437679

申请日：2019-11-17

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Takashi SEKIZAWA ,  Tomokatsu KASHIMA ,  Yuya ONO ,  Yuki TOUMATSU ,  Yudai KAWAGUCHI ,  Kazuyoshi TORII

IPC: H01T13/32 ,  H01T13/06 ,  H01T21/02

Abstract: A spark plug that can reduce variation in a discharge point. The spark plug includes: a center electrode; a metal shell insulating and holding the center electrode; and a ground electrode including a base material having one end portion connected to the metal shell, and a tip connected to another end portion of the base material. The tip has a discharge surface opposed to the center electrode with a spark gap therebetween. The discharge surface has a quadrangular shape and is chamfered at four sides thereof. Only a first side which is one of the four sides is provided with a C chamfer.

公开(公告)号：US20150372458A1

公开(公告)日：2015-12-24

申请号：US14650075

申请日：2013-12-13

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Go MATSUMURA ,  Kazuyoshi TORII ,  Yasuhide SHIMANOKAMI

IPC: H01T13/39 ,  H01T13/36

CPC classification number: H01T13/39 ,  H01T13/20 ,  H01T13/36

Abstract: A spark plug having a of center electrode, a ground electrode, and a noble metal tip that is laser-welded to at least one of the center electrode and the ground electrode The noble metal tip is joined to the electrode through a fused portion formed by laser welding, and the fused portion includes a first fused portion and a second fused portion.

Abstract translation: 一种火花塞，其具有中心电极，接地电极和激光焊接到中心电极和接地电极中的至少一个的贵金属电极头。贵金属电极头通过由 激光焊接，熔融部包括第一熔接部和第二熔融部。