公开(公告)号：US5557158A

公开(公告)日：1996-09-17

申请号：US260792

申请日：1994-06-16

申请人： Keiji Kanao ,  Kozo Takamura

发明人： Keiji Kanao ,  Kozo Takamura

IPC分类号： F02B75/02 ,  H01T13/39 ,  H01T21/02 ,  H01T13/20 ,  H01J13/56 ,  H01T13/22

CPC分类号： H01T13/39 ,  H01T21/02 ,  F02B2075/027

摘要： A spark plug which realizes reliability against thermal stress even in a case where dissimilar noble metal materials are disposed on the tip portion of the center electrode opposing the ground electrode and which realizes improved productivity while assuring durable reliability. The spark plug includes a center electrode electrically insulated from a housing and having a small-diameter portion at a tip portion which has a diameter smaller than that of a main body of the center electrode and composed of similar kinds of material as the center electrode, and a round-shape material, which is formed into a cylindrical or a ring shape, composed of dissimilar metal material. The round-shape material is fitted to the small-diameter portion of the center electrode so as to form a minute clearance between an inner surface of the round-shape material and is fixed to the center electrode by a large diameter portion which is integrally formed on a tip portion of the center electrode such that the minute clearance is kept between the round-shape material and the center electrode.

摘要翻译： 即使在与接地电极相对的中心电极的前端部配置有异种的贵金属材料的情况下也实现热应力的可靠性的火花塞，其实现了提高的生产率，同时确保了耐用的可靠性。 火花塞包括与壳体电绝缘的中心电极，在尖端部具有比中心电极的主体的直径小的直径部分，并且由与中心电极类似的材料构成的小直径部分， 以及由异种金属材料构成的圆筒状或环状的圆形材料。 将圆形材料装配到中心电极的小直径部分上，以便在圆形材料的内表面之间形成微小间隙，并通过一体形成的大直径部分固定到中心电极 在中心电极的尖端部分上，使得在圆形材料和中心电极之间保持微小的间隙。

公开(公告)号：US5502352A

公开(公告)日：1996-03-26

申请号：US291544

申请日：1994-08-16

申请人： Akio Katoh ,  Kozo Takamura

发明人： Akio Katoh ,  Kozo Takamura

IPC分类号： H01T13/20 ,  H01T13/32 ,  H01T13/39 ,  H01T13/46

CPC分类号： H01T13/39 ,  H01T13/467

摘要： According to the present invention, a spark plug for an internal combustion engine includes a center electrode, a ground electrode so as to form a spark gap with the center electrode, and a tip electrode composed of a material having a superior consumable resistance as compared to the center electrode and disposed on an end face of the center electrode so as to form a spark gap with the ground electrode. An axial length of the discharge portion of the ground electrode where spark discharge occurs is substantially larger than an axial length of the tip electrode where spark discharge occurs. When used for an internal combustion engine, a spark discharge is mainly generated between the peripheral surface of the center electrode and the ground electrode during early operation. Consequently, as the center electrode has been consumed, the spark discharge is mainly generated between the tip electrode and the ground electrode. Therefore, the frequency of the spark discharge with the center electrode is lowered, and a low required voltage is maintained.

摘要翻译： 根据本发明，一种用于内燃机的火花塞包括中心电极，接地电极，以便与中心电极形成火花隙，以及由具有优异消耗电阻的材料构成的尖端电极与 中心电极并且设置在中心电极的端面上，以与接地电极形成火花隙。 发生火花放电的接地电极的放电部分的轴向长度大大大于发生火花放电的尖端电极的轴向长度。 当用于内燃机时，在早期操作期间主要在中心电极的外围表面和接地电极之间产生火花放电。 因此，随着中心电极被消耗，主要在尖端电极和接地电极之间产生火花放电。 因此，与中心电极的火花放电的频率降低，并且维持低的所需电压。

公开(公告)号：US5488262A

公开(公告)日：1996-01-30

申请号：US987951

申请日：1992-12-11

申请人： Kozo Takamura

发明人： Kozo Takamura

IPC分类号： H01T13/20 ,  H01T13/39 ,  H01T21/02

CPC分类号： H01T21/02 ,  H01T13/39

摘要： A spark discharge tip, such as for a spark plug for an internal combustion engine in which the life of the tip is prolonged. A composite material is formed by bonding a material for a discharge layer, mainly composed of platinum, to a material for a thermal stress relieving layer, which is an alloy mainly composed of platinum, and having a coefficient of thermal expansion between that of the electrode and that of the discharge layer. A composite tip is formed by stamping the composite material into a columnar shape from the discharge layer side so that the periphery of the interface between the discharge layer and stress relieving layer is covered by the discharge layer. The composite tip is then resistance welded to the electrode.

摘要翻译： 火花放电尖端，例如用于内燃机的火花塞，其中尖端的寿命延长。 复合材料通过将主要由铂组成的放电层用材料与主要由铂组成的合金作为热应力消除层的材料进行接合而形成，并且其电极的热膨胀系数 和放电层。 通过将复合材料从放电层侧冲压成柱状形成复合顶端，使得放电层和应力消除层之间的界面的周边被放电层覆盖。 然后将复合尖端电阻焊接到电极。

公开(公告)号：US5202601A

公开(公告)日：1993-04-13

申请号：US634351

申请日：1990-12-26

申请人： Kozo Takamura ,  Yasuyuki Sato ,  Kiyoaki Tanaka

发明人： Kozo Takamura ,  Yasuyuki Sato ,  Kiyoaki Tanaka

IPC分类号： F02B1/04 ,  H01T13/39

CPC分类号： H01T13/39 ,  F02B1/04

摘要： A spark plug for use in an internal combustion engine comprises a central electrode made of a base metal and an earth electrode. A tip portion is provided on the central electrode. The tip portion includes a noble metal tip layer for defining a spark discharge gap between the noble metal tip layer and the earth electrode, and an alloy layer provided between the noble metal tip layer and the central electrode. The tip portion is provided with grooves to be divided into a plurality of sections. The tip portion has an outer peripheral wall flared towards the earth electrode, and a width of the grooves gradually increases from a bottom thereof to a surface of the noble metal tip layer for defining the spark discharge gap.

公开(公告)号：US4581558A

公开(公告)日：1986-04-08

申请号：US450801

申请日：1982-12-17

申请人： Kozo Takamura ,  Yasuyuki Sato ,  Kanji Higuchi

发明人： Kozo Takamura ,  Yasuyuki Sato ,  Kanji Higuchi

IPC分类号： F02B75/02 ,  H01T13/20 ,  H01T13/32 ,  H01T13/39

CPC分类号： H01T13/32 ,  H01T13/20 ,  H01T13/39 ,  F02B2075/027

摘要： A spark plug for an internal combustion engine including a center electrode, an earth electrode, a metal tip joined by welding to an ignition section of at least one of the center electrode and the earth electrode, and an alloy layer located at a welding portion between the metal tip and the at least one electrode. The metal tip is formed of material highly resistant to heat and wear which is distinct in the coefficient of thermal expansion from the material of the electrodes. The alloy layer is formed to have a thickness of at least about 10.mu., so as to avoid the rupture of the metal tip along the surface thereof adjacent to the welding portion.

摘要翻译： 一种用于内燃机的火花塞，其包括中心电极，接地电极，通过焊接连接到中心电极和接地电极中的至少一个的点火部分的金属端头以及位于焊接部分之间的合金层 金属尖端和至少一个电极。 金属尖端由耐高温和耐磨性的材料形成，其热膨胀系数与电极的材料不同。 合金层形成为具有至少约10微米的厚度，以避免金属末端沿其邻近焊接部分的表面破裂。

公开(公告)号：US4540910A

公开(公告)日：1985-09-10

申请号：US552964

申请日：1983-11-17

申请人： Ryoji Kondo ,  Kozo Takamura ,  Kanji Higuchi

发明人： Ryoji Kondo ,  Kozo Takamura ,  Kanji Higuchi

IPC分类号： H01T13/39 ,  H01T13/20

CPC分类号： H01T13/39

摘要： A spark plug for internal-combustion engines has a spark discharge gap defined between at least two electrodes opposing to each other, and a platinum-containing wear-resistant discharging layer provided on one of the electrodes. The spark plug has a thermal stress relieving layer disposed between the discharging layer and the base metal constituting the one eletrode. The thermal stress relieving layer is made of a platinum base alloy containing nickel, which constitutes the base metal. The discharging layer may be made of a material consisting essentially of 70 to 90 wt % platinum and 30 to 10 wt % iridium. The thermal stress relieving layer may be made of a material consisting essentially of 5 to 95 wt % platinum and 95 to 5 wt % nickel. Another platinum-containing wear-resistant layer may be provided on the other electrode, the wear-resistant layer being made of a material consisting essentially of 5 to 60 wt % nickel and 95 to 40 wt % platinum.

摘要翻译： 用于内燃机的火花塞具有限定在彼此相对的至少两个电极之间的火花放电间隙和设置在其中一个电极上的含铂耐磨性放电层。 火花塞具有设置在排出层和构成一电极的基体金属之间的热应力消除层。 热应力消除层由含有镍的铂基合金制成，构成贱金属。 放电层可以由基本上由70-90重量％的铂和30至10重量％的铱组成的材料制成。 热应力消除层可以由基本上由5至95重量％的铂和95至5重量％的镍组成的材料制成。 另一个含铂的耐磨层可以设置在另一个电极上，该耐磨层由基本上由5至60重量％的镍和95至40重量％的铂组成的材料制成。

公开(公告)号：US07309848B2

公开(公告)日：2007-12-18

申请号：US11185010

申请日：2005-07-20

申请人： Kozo Takamura ,  Makoto Shirai ,  Kenji Fukaya

发明人： Kozo Takamura ,  Makoto Shirai ,  Kenji Fukaya

IPC分类号： H05B3/44

CPC分类号： H05B3/06 ,  F23Q2007/002 ,  H05B3/141

摘要： A ceramic heater is provided which may be built in a gas sensor to heat a sensor element up to a desired activation temperature. The ceramic heater includes a pair of electrical conductors formed on a ceramic body. Each of the conductors is equipped with a terminal. Leads are joined to the terminals for supplying electrical power to the conductors. Joints between the leads and the terminals are covered hermetically by a seal, thereby minimizing corrosion thereof to avoid disconnections of the terminals from the leads. This improves the durability of the ceramic heater.

摘要翻译： 提供陶瓷加热器，其可以内置在气体传感器中以将传感器元件加热至期望的活化温度。 陶瓷加热器包括形成在陶瓷体上的一对电导体。 每个导线都配有一个端子。 引线连接到用于向导体提供电力的端子。 引线和端子之间的接头被密封件气密地覆盖，从而使其腐蚀最小化，以避免端子与引线断开。 这提高了陶瓷加热器的耐久性。

公开(公告)号：US07078659B2

公开(公告)日：2006-07-18

申请号：US11110819

申请日：2005-04-21

申请人： Taiji Yokoyama ,  Kozo Takamura ,  Makoto Shirai

发明人： Taiji Yokoyama ,  Kozo Takamura ,  Makoto Shirai

IPC分类号： H05B3/50

CPC分类号： H05B3/06 ,  H05B3/141

摘要： A ceramic heater is provided which may be employed in a gas sensor. The ceramic heater includes a heating element disposed inside a ceramic body, a connector assembly, and a cover coating. The connector assembly consists of an external terminal, a connector terminal, and a metallic joint layer. The external terminal is affixed to an outer surface of the ceramic body in electrical connection with the heating element. The joint layer is formed on the external terminal to establish an electrical joint between the external terminal and the connector terminal. The cover coating is wrapped over a surface of the connector assembly and made of a metallic material containing a main component of one of Au, Pt, and Cr, thereby ensuring a corrosion resistance of the connector assembly.

摘要翻译： 提供了可用于气体传感器的陶瓷加热器。 陶瓷加热器包括设置在陶瓷体内部的加热元件，连接器组件和覆盖层。 连接器组件由外部端子，连接器端子和金属接合层组成。 外部端子固定到陶瓷体的与加热元件电连接的外表面。 接合层形成在外部端子上，以在外部端子和连接器端子之间建立电连接。 覆盖层被包裹在连接器组件的表面上，并由包含Au，Pt和Cr之一的主要成分的金属材料制成，从而确保连接器组件的耐腐蚀性。

公开(公告)号：US20060016802A1

公开(公告)日：2006-01-26

申请号：US11185010

申请日：2005-07-20

申请人： Kozo Takamura ,  Makoto Shirai ,  Kenji Fukaya

发明人： Kozo Takamura ,  Makoto Shirai ,  Kenji Fukaya

IPC分类号： H05B3/16

CPC分类号： H05B3/06 ,  F23Q2007/002 ,  H05B3/141

摘要： A ceramic heater is provided which may be built in a gas sensor to heat a sensor element up to a desired activation temperature. The ceramic heater includes a pair of electrical conductors formed on a ceramic body. Each of the conductors is equipped with a terminal. Leads are joined to the terminals for supplying electrical power to the conductors. Joints between the leads and the terminals are covered hermetically by a seal, thereby minimizing corrosion thereof to avoid disconnections of the terminals from the leads. This improves the durability of the ceramic heater.

摘要翻译： 提供陶瓷加热器，其可以内置在气体传感器中以将传感器元件加热至期望的活化温度。 陶瓷加热器包括形成在陶瓷体上的一对电导体。 每个导线都配有一个端子。 引线连接到用于向导体提供电力的端子。 引线和端子之间的接头被密封件气密地覆盖，从而使其腐蚀最小化，以避免端子与引线断开。 这提高了陶瓷加热器的耐久性。

公开(公告)号：US06466123B1

公开(公告)日：2002-10-15

申请号：US09196130

申请日：1998-11-20

申请人： Kaoru Kuzuoka ,  Kozo Takamura

发明人： Kaoru Kuzuoka ,  Kozo Takamura

IPC分类号： H01C304

CPC分类号： H01C1/028 ,  G01K7/22 ,  Y10T29/49082

摘要： A temperature sensor has a sensing element (13) consisting of a thermistor (11) and leads (12) and a sheath pin (15) containing core wires (14), to accurately detect temperature. A method of manufacturing such a temperature sensor includes the steps of connecting the leads to the core wires, arranging an insulator (130) around the sensing element, filling the insulator with an inorganic adhesive (135) to fix the sensing element in the insulator, arranging a metal cover (16) around the insulator, and joining an end of the metal cover to an end of the sheath pin.

摘要翻译： 温度传感器具有由热敏电阻（11）和引线（12）组成的检测元件（13）和包含芯线（14）的护套引脚（15），以精确地检测温度。 制造这种温度传感器的方法包括以下步骤：将引线连接到芯线，在感测元件周围布置绝缘体（130），用无机粘合剂（135）填充绝缘体以将感测元件固定在绝缘体中， 在绝缘体周围布置金属盖（16），并且将金属盖的端部接合到护套销的端部。