公开(公告)号：USRE43758E1

公开(公告)日：2012-10-23

申请号：US11495524

申请日：2006-07-31

申请人： Wataru Matsutani ,  Junichi Kagawa

发明人： Wataru Matsutani ,  Junichi Kagawa

IPC分类号： H01T13/20 ,  H01T13/39

摘要： Spark plug has a central electrode, an insulator provided exterior to the central electrode, main metallic shell provided exterior to the insulator in such a way that the central electrode protrudes from one end, and a ground electrode coupled at one end to the main metallic shell and which has the other end disposed to face the central electrode 3, with a chip being secured to either the central electrode or the ground electrode or both to form spark discharge gap g. The chip is made of a metal based on Ir which contains Rh in an amount ranging from 3 to 50 wt (50 wt % being not inclusive).

摘要翻译： 火花塞具有中心电极，设置在中心电极外部的绝缘体，主金属外壳设置在绝缘体的外部，使得中心电极从一端突出，并且接地电极在一端连接到主金属外壳 并且其另一端设置为面对中心电极3，其中芯片固定到中心电极或接地电极或两者以形成火花放电间隙g。 该芯片由Ir含量为3〜50重量％（不包括50重量％）的Rh构成。

公开(公告)号：US5189333A

公开(公告)日：1993-02-23

申请号：US661149

申请日：1991-02-27

申请人： Junichi Kagawa ,  Masaaki Murase ,  Shinichi Nakamura

发明人： Junichi Kagawa ,  Masaaki Murase ,  Shinichi Nakamura

IPC分类号： H01T13/20 ,  H01T13/46

CPC分类号： H01T13/467

摘要： In a multi-gap type spark plug for an internal combustion engine, the spark plug has a cylindrical metallic shell into which a tubular ceramic insulator is enclosed. The insulator has a tapered front leg portion, a front end of which extends beyond that of the metallic shell. A center electrode is enclosed into the insulator, having at a front end thereof, a filing tip extending beyond that of the insulator. A plurality of L-shaped outer electrodes each having a vertical piece and lateral piece, the vertical piece depending from the front end of the metallic shell to surround the front end of the insulator, while the lateral piece having an inner surface arranged in parallel with a front end surface of the insulator, and having an end tip terminated to oppose an outer surface of the firing tip through a spark gap established therebetween. A vertical distance between the front end surface of the insulator and the inner surface of the lateral piece of each outer electrode is determined to be within a dimension ranging from 0.3 mm to 1.2 mm.

公开(公告)号：US5144188A

公开(公告)日：1992-09-01

申请号：US688120

申请日：1991-04-19

申请人： Junichi Kagawa ,  Wataru Matsutani

发明人： Junichi Kagawa ,  Wataru Matsutani

IPC分类号： H01T13/16 ,  H01T13/32

CPC分类号： H01T13/32 ,  H01T13/16

摘要： In a spark plug having a cylindrical metallic shell a front end of which is extended into a combustion chamber of an internal combustion engine, an insulator is provided within the metallic shell so as to provide an annular clearance between a front end of the metallic shell and that of the insulator, a width of the annular clearance being within a range of 0.65 mm .+-.0.25 mm. An extension skirt which the metallic shell is extended into the combustion chamber has a length within a range from 1.0 mm to 3.0 mm. A tapered surface is provided by planing off an inner edge of a front end of the metallic shell, and the surface angularly falls within angles from 20 to 40 degrees. One end of an outer electrode is welded to the tapered surface while other end of the outer electrode is bent to oppose a front end of a center electrode.

公开(公告)号：US4914343A

公开(公告)日：1990-04-03

申请号：US288920

申请日：1988-12-23

申请人： Junichi Kagawa ,  Wataru Matsutani ,  Alfred Krappel ,  Josef Holzmann ,  Johannes Guggenmos

发明人： Junichi Kagawa ,  Wataru Matsutani ,  Alfred Krappel ,  Josef Holzmann ,  Johannes Guggenmos

IPC分类号： H01T13/32 ,  H01T13/46 ,  H01T13/54

CPC分类号： H01T13/54 ,  H01T13/467

摘要： The outer or side electrode of a spark plug is configured as a flat plate confronting the center electrode to define a gap, and fixed to the threaded shell or body of the plug by a plurality of spider legs. A plurality of holes are formed in the plate to improve the plug durability and retard any discharge voltage increases.

公开(公告)号：US4808135A

公开(公告)日：1989-02-28

申请号：US107940

申请日：1987-10-13

申请人： Akio Sakura ,  Mitsutaka Yoshida ,  Junichi Kagawa

发明人： Akio Sakura ,  Mitsutaka Yoshida ,  Junichi Kagawa

IPC分类号： H01T13/16 ,  H01T13/39

CPC分类号： H01T13/39 ,  H01T13/16

摘要： In a center electrode structure for spark plug including a tublar insulator, the inner side of which has a stepped shoulder to provide a diameter-reduced bore therein; a center electrode having a flange, and concentrically placed into the insulator with the flange engaging against the shoulder, and with one end being axially through the bore so as to be exposed to outside of the insulator; the center electrode having an electrically conductive core of copper or copper-based alloy which is encased into an enclosure made of oxidation and heat resistant nickel-based alloy; and the core being provided with a number of fractures in its granular structure so as to absorb thermal stress due to the thermal expansional difference between the core and enclosure.

摘要翻译： 在一种用于火花塞的中心电极结构中，该火花塞包括一个绝缘子，其内侧具有阶梯状的肩部以在其中提供直径减小的孔; 具有凸缘的中心电极，并且同心地放置在所述绝缘体中，所述凸缘与所述肩部接合，并且一端轴向地穿过所述孔，以暴露于所述绝缘体的外部; 所述中心电极具有铜或铜基合金的导电芯，所述导体芯被封装在由氧化和耐热的镍基合金制成的外壳中; 并且芯在其颗粒结构中被提供多个裂缝，以便由于芯和外壳之间的热膨胀差而吸收热应力。

公开(公告)号：US4670684A

公开(公告)日：1987-06-02

申请号：US613488

申请日：1984-05-24

申请人： Junichi Kagawa ,  Takafumi Oshima

发明人： Junichi Kagawa ,  Takafumi Oshima

IPC分类号： C22C5/04 ,  H01T13/39 ,  H01T13/20

CPC分类号： H01T13/39

摘要： A spark plug is disclosed having central and ground electrodes made of a nickel-base alloy and a chip made of a platinum-nickel alloy having good bonding properties to the nickel-base alloy joined to the spark discharge surface of at least one of the central and ground electrodes. In another embodiment, the chip has an intermediate layer made of the platinum-nickel alloy and a top surface layer made of platinum or a platinum-base alloy having a higher spark wear resistance than the platinum-nickel alloy. Since the chip has good bonding properties to the nickel-base alloy, peeling of the chip from the central or ground electrode does not occur, and thus the spark plug has a high durability. If a chip having intermediate and top surface layers is used, since the top surface layer exhibits a higher spark wear resistance, the resulting spark plug is of higher durability.

摘要翻译： 公开了一种火花塞，其具有由镍基合金制成的中心和接地电极以及与镍基合金具有良好接合性能的铂 - 镍合金芯片，该镍基合金与至少一个中心的火花放电表面接合 和接地电极。 在另一个实施例中，芯片具有由铂 - 镍合金制成的中间层和由铂或铂基合金制成的顶表面层，其具有比铂 - 镍合金高的火花耐磨性。 由于芯片对镍基合金具有良好的接合性能，所以不会发生芯片从中心或接地电极的剥离，因此火花塞具有高耐久性。 如果使用具有中间和顶面层的芯片，由于顶表面层具有更高的耐火花磨损性，所以产生的火花塞具有更高的耐久性。

公开(公告)号：US4329174A

公开(公告)日：1982-05-11

申请号：US73589

申请日：1979-09-07

申请人： Tsuneo Ito ,  Junichi Kagawa

发明人： Tsuneo Ito ,  Junichi Kagawa

IPC分类号： C22C19/03 ,  C22C19/05 ,  H01T13/39

CPC分类号： C22C19/03 ,  C22C19/058

摘要： A nickel alloy for spark plug electrodes consisting essentially of, by weight percent,about 0.2 to 3% Siabout 0.5% Mn or lessat least two metals selected from the group consisting ofabout 0.2 to 3% Crabout 0.2 to 3% Al andabout 0.01 to 1% Yand the balance nickel.

摘要翻译： 用于火花塞电极的镍合金，其基本上由重量百分数约为0组成。