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Patent Agency Ranking
公开(公告)号：US20190131775A1
公开(公告)日：2019-05-02
申请号：US16091144
申请日：2017-01-13
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yusuke KAWASHIMA , Hiroyuki HAZAMA
Abstract: Disclosed is a spark plug having a ground electrode in which a weld zone is formed a tip and electrode base. The weld zone has: a back region exposed at an opposite surface of the electrode base; a joint region at which the tip is joined; and a connection region connects the joint region and the back region without being exposed at side surfaces of the electrode base. In a cross section of the ground electrode taken through the side surfaces of the electrode base along a plane passing through the centers of the top and bottom surfaces of the tip, a value of a width of the top surface of the tip being divided by a width of the facing surface of the electrode base is greater than 0.3, and a maximum width of the connection region is larger than a width of the back region.
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公开(公告)号：US20210036491A1
公开(公告)日：2021-02-04
申请号：US16640133
申请日：2018-07-16
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yusuke KAWASHIMA
Abstract: A spark plug that allows a heat transfer member to be fixed to an insulator in a simple manner. The spark plug includes: a tubular insulator extending in an axial line direction from a front side to a rear side; and a tubular metal shell fixed to an outer circumference of the insulator and having an external thread formed on a part of an outer circumferential surface thereof, wherein the insulator has a groove formed on a portion, of an outer circumferential surface thereof, that overlaps the external thread of the metal shell in the axial line direction, a heat transfer member mounted in the groove is in contact with an inner circumferential surface of the metal shell, and a portion of the heat transfer member is disposed in the groove of the insulator.
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公开(公告)号：US20170187170A1
公开(公告)日：2017-06-29
申请号：US15315105
申请日：2015-05-26
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Daisuke SUMOYAMA , Tatsuya GOZAWA , Magoki SHIMADATE , Yusuke KAWASHIMA
Abstract: An electrode tip for a spark plug, wherein Pt is contained as a main component, 7% by mass or more of Rh is contained, and a total content of Pt and Rh is greater than or equal to 95% by mass. The electrode tip includes: a narrow portion having the same cross-sectional shape in a direction of an axis; and a wide portion which is adjacent to the narrow portion and has a cross-sectional area, in a radial direction, which is greater than the narrow portion.
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公开(公告)号：US20210249846A1
公开(公告)日：2021-08-12
申请号：US16973599
申请日：2020-03-19
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yusuke TANAHASHI , Naoki NISHIO , Yusuke KAWASHIMA
IPC: H01T13/34
Abstract: A spark plug including a center electrode that has a large-diameter portion having an outside diameter that is largest in the center electrode. The large-diameter portion is retained at a rear facing surface in an axial hole of an insulator. A metal shell has a diameter increased portion on a rear end side with respect to the center electrode, the diameter increased portion having an inside diameter that is increased toward the rear end side. The insulator has a first portion which is a portion of the insulator in a region from a rear end of the rear facing surface to a front end of the diameter increased portion. The first portion has a thickness that is the largest in the region, and is disposed at least on an outer periphery of the large-diameter portion.
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公开(公告)号：US20150380907A1
公开(公告)日：2015-12-31
申请号：US14755361
申请日：2015-06-30
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yusuke KAWASHIMA
Abstract: A spark plug comprises a ground electrode including a chip whose one end has a cylinder shape having a diameter A from 0.8 to 1.2 mm and whose main component is a noble metal, and an electrode base material. In the ground electrode, a portion of the other end of the chip is joined to the electrode base material through a fused portion. The spark plug also comprises a chip-and-base-material interface in which the chip and the electrode base material contact each other and which is surrounded by the fused portion. In a cross section passing through a center axis, a distance between an end point Pa7 located on the chip-and-base-material interface and an end point Pa5 located on an interface between the chip and the fused portion is equal to or greater than 0.7 times the diameter A.
Abstract translation: 火花塞包括接地电极，该接地电极包括其一端具有直径A为0.8至1.2mm并且其主要成分为贵金属的圆筒形状的芯片和电极基底材料。 在接地电极中，芯片的另一端的一部分通过熔融部与电极母材接合。 火花塞还包括芯片和基底材料界面，其中芯片和电极基体材料彼此接触并且被熔融部分包围。 在穿过中心轴线的横截面中，位于芯片和基材界面上的端点Pa7与位于芯片与熔断部分之间的界面上的端点Pa5之间的距离等于或大于 直径A的0.7倍
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