Patents by Inventor Yoshio Takagi
Yoshio Takagi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20080145174Abstract: A channel fastener, which is capable of preventing or suppressing the plastic deformation of a leaf spring when the other device such as a fuel assembly and a tool is brought into contact therewith from the upper side, is provided. The channel fastener (6) comprises a leaf spring guard (9) having a leg body (13) formed in a roughly L-shape in horizontal cross section and extending vertically and a flat upper plate (12) connected to the leg body (13) at the upper end of the leg body (13) and extending horizontally, and a leaf spring (8) having an upper plate part (15) fixed to the leaf spring guard flat upper plate (12) and extending along the leaf spring guard flat upper plate (12) and at least two legs (17) connected to the upper plate part (15) and extending downward along the leaf spring guard leg body (13). One or a plurality of projected parts (21) projected upward are formed on the leaf spring guard fiat upper plate (12).Type: ApplicationFiled: December 20, 2005Publication date: June 19, 2008Applicant: The Tokyo Electric Power Company, Inc.Inventors: Shunichi Suzuki, Yoshio Takagi, Yoshiaki Ishii, Akihiro Miyazaki, Tadashi Teramatsu, Akihiko Fujita, Masatake Taguchi, Shingo Yamaguchi
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Patent number: 5834842Abstract: A groove (21) is formed on an upper surface of sealing resin (2) in the form of a strip. A device (101) is pressed against a flat surface of a radiating fin (55) by a band plate shaped clamper (61) which is engaged with the groove (21). Due to the engagement of the clamper (61) and the groove (21), movement of the device (101) is limited. Namely, the device (101) is stably fixed to the radiating fin (55). Since the device (101) is fixed to the radiating fin (55) by the clamper (61), no hole for receiving a fastening screw is provided in the sealing resin (2). Therefore, the sealing resin (2) is reduced, whereby miniaturization of the device (101) is implemented. Thus, the device is miniaturized at no sacrifice of radiation efficiency.Type: GrantFiled: October 27, 1997Date of Patent: November 10, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Gourab Majumdar, Satoshi Mori, Sukehisa Noda, Tooru Iwagami, Yoshio Takagi, Hisashi Kawafuji
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Patent number: 5773883Abstract: In a device (101) formed as an invertor, terminals connected to floating source pins (VS) which are provided in control circuits (31 to 33) are limited to output terminals (U, V, W). In order to hold voltages across floating source pins (VD, VS), capacitive elements (51 to 53) which are provided around the device (101) are connected to the output terminals (U, V, W). Thus, the terminals which are connected with the floating source pins (VS) are shared by the output terminals (U, V, W), whereby the numbers of the terminals and wiring patterns are reduced. Thus, the device (101) is miniaturized.Type: GrantFiled: June 13, 1996Date of Patent: June 30, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Gourab Majumdar, Satoshi Mori, Sukehisa Noda, Tooru Iwagami, Yoshio Takagi, Hisashi Kawafuji
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Patent number: 5747876Abstract: It is an object to facilitate assembly of an application device. A device (101) is provided with a heat sink (51) to radiate loss heat of an IGBT element (11) as a power semiconductor element to an external radiation fin. External terminals (5 and 6) connected to an external circuit substrate protrude in the direction in which the exposed surface of the heat sink (51) is directed. Accordingly, when assembling an application device by mounting the device (101) on the external circuit substrate together with other circuit elements, it is possible to mount the device (101) and other circuit elements together on the common main surface of the circuit substrate, i.e., on its main surface on the side opposite to the side where the radiation fin is attached. Accordingly, it is possible to collectively apply solder on the common main surface of the circuit substrate and collectively solder the device (101) and the other circuit elements.Type: GrantFiled: July 16, 1996Date of Patent: May 5, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Gourab Majumdar, Satoshi Mori, Sukehisa Noda, Tooru Iwagami, Yoshio Takagi, Hisashi Kawafuji
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Patent number: 5686758Abstract: It is an object of the present invention to obtain a power semiconductor device with small size and high reliability in power semiconductor devices having integral structure of case and external connection terminals. A dummy pad (42) having no electric connection with other parts is provided and a terminal end of a connecting wire (46) connecting by sequentially bonding an exposed surface of a connection electrode (43) and a bonding pad (41) of a semiconductor element (40) is bonded thereto. The semiconductor device can be miniaturized without deteriorating electric characteristics and reliability of the semiconductor elements.Type: GrantFiled: May 16, 1995Date of Patent: November 11, 1997Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kiyoshi Arai, Yoshio Takagi, Tatsuya Iwasa
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Patent number: 5672910Abstract: It is an object to downsize a device while maintaining a high breakdown voltage. An external terminal (7) protrudes to the outside from the side wall of a sealing resin (2) and a heat sink (1) is exposed in the bottom of the sealing resin (2). A step surface (21) retracted from the exposed surface of the heat sink (1) is formed in the part of the sealing resin (2) surrounding the periphery of the heat sink (1). When using this semiconductor device, the exposed surface of the heat sink (1) is brought into surface contact with the flat surface (41a) of the radiation fin (41) and an insulation sheet (31) is interposed between the step surface (21) and the flat surface (41a), and which is pressed therebetween. The insulation sheet (31) is disposed to cover the region facing the external terminal (7) in the flat surface (41a).Type: GrantFiled: June 13, 1996Date of Patent: September 30, 1997Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Gourab Majumdar, Satoshi Mori, Sukehisa Noda, Tooru Iwagami, Yoshio Takagi, Hisashi Kawafuji
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Patent number: 5424579Abstract: A first composite substrate including an insulating substrate, a copper pattern, and a copper layer on opposite surfaces is mounted on a metal base plate. A second composite substrate and semiconductor chips are mounted on the first composite substrate and interconnected by wire bonding. The paths of current flowing in the wires and in a copper pattern of the second composite substrate are antiparallel to the paths of current flowing in respective corresponding portions of the first composite substrate. A semiconductor device is produced in which an increasing switching frequency does not increase a surge voltage generated in ON and OFF switching operations.Type: GrantFiled: July 2, 1993Date of Patent: June 13, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kiyoshi Arai, Yoshio Takagi
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Patent number: 5028363Abstract: A method of casting a powdered material. A slurry is formed by dispersing metal powder or ceramic powder into a dispersing medium mainly consisting of a substance extractable by a liquid or supercritical carbon dioxide and having a melting point between 0.degree. C. and 100.degree. C., and the slurry is poured into a liquid non-absorbing mold where the slurry is cooled to freeze and solidify into a molding. The main constituent of the dispersing medium in the molding is extracted and removed by the liquid or supercritical carbon dioxide.Type: GrantFiled: January 16, 1990Date of Patent: July 2, 1991Assignee: NKK CorporationInventors: Hiroaki Nishio, Takeshi Kawashima, Yoshio Takagi
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Patent number: 4979991Abstract: A production process of pigment according to this invention comprises the steps of: a first step of forming an inorganic compound coating layer on the entire surfaces of scaly substrates made of ceramic; a second step of forming metallic glossy dots on the surfaces of the inorganic compound coating layer in a scattered manner by an electroless plating, and the metallic glossy dots occupying from 0.05 to 95% of the surfaces of the inorganic compound coating layer with respect to the total surface area of the inorganic compound coating layer; and a third step of irradiating ultraviolet ray on particles formed by the second step. The impurities and the like, which adversely affect the color hue of the pigment, have been discolored or faded away by the ultraviolet ray irradiation in the third step. Accordingly, the pigment having good weather resistance can be produced readily and stably by the present invention.Type: GrantFiled: September 18, 1989Date of Patent: December 25, 1990Assignee: Toyota Jidosha Kabushiki KaishaInventors: Junichi Handa, Hiroshi Itou, Taketoshi Minohara, Yoshio Takagi
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Patent number: 4976787Abstract: A pigment comprises a substrate, a metallic layer formed on at least one surface of the substrate and imparting metallic luster, and a transparent inorganic compound layer formed on surfaces of the substrate and the metallic layer. Thereby, the pigment produces color by light interference of a ray reflected on a surface of the transparent inorganic compound layer and a ray passed through the transparent inorganic compound layer and reflected on a surface of the metallic layer. Thus, the pigment is excellent in coloring power and hiding power, and particularly useful for an automotive finishing paint.Type: GrantFiled: March 14, 1990Date of Patent: December 11, 1990Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroshi Ito, Junichi Handa, Yoshio Takagi, Taketoshi Minohara
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Patent number: 4954176Abstract: A pigment of this invention comprises a ceramic scaly substrate, and metal dots or alloy dots formed on the surfaces of ceramic scaly substrate in the ratio of from 0.05 to 95% of the total surface area of ceramic scaly substrate. An inorganic compound coating film may further be formed on all over the surfaces of ceramic scaly substrate, and metal dots or alloy dots may be formed on the surfaces of inorganic compound coating film instead of on the surfaces of ceramic scaly substrate in the same ratio. Thus, this pigment gives various hues with metallic gloss feelings due to combined effect of light reflection and light scattering with metal dots or alloy dots and even light interference with two pairs of reflecting surfaces when the inorganic compound coating film is employed.Type: GrantFiled: October 3, 1988Date of Patent: September 4, 1990Assignee: Toyota Jidosha Kabushiki KaishaInventors: Taketoshi Minohara, Yoshio Takagi, Tadashi Isobe, Keita Suzuki
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Patent number: 4954175Abstract: A pigment comprises a substrate, a metallic layer formed on at least one surface of the substrate and imparting metallic luster, and a transparent inorganic compound layer formed on surfaces of the substrate and the metallic layer. Thereby, the pigment produces color by light interference of a ray reflected on a surface of the transparent inorganic compound layer and a ray passed through the transparent inorganic compound layer and reflected on a surface of the metallic layer. Thus, the pigment is excellent in coloring power and hiding power, and particularly useful for an automotive finishing paint.Type: GrantFiled: February 7, 1989Date of Patent: September 4, 1990Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroshi Ito, Junichi Handa, Yoshio Takagi, Taketoshi Minohara
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Patent number: 4927600Abstract: The invention is concerned with the method of compression molding a metallic or ceramic powders. The method includes the step of maintaining a negative pressure within a first mold of noncompactable powders for intimately contacting on its inner surface a pouch-like member of thin-walled resilient material for producing a second mold, and the step of compactly charging starting powders into the second mold and exhausting air from and sealing the second mold, taking out a pre-molded body of the metallis or ceramic powders together with the second mold and the step of processing the pre-molded body by a cold or hot isostatic press.Type: GrantFiled: October 8, 1987Date of Patent: May 22, 1990Assignee: Nippon Kokan Kabushiki KaishaInventors: Tsuneo Miyashita, Hiroaki Nishio, Kazuya Yabuta, Yoshio Takagi
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Patent number: 4885629Abstract: A semiconductor apparatus having a plurality of electrodes comprises two external terminals provided for each electrode for being coupled to an input signal.Type: GrantFiled: July 27, 1983Date of Patent: December 5, 1989Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Yoshio Takagi
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Patent number: 4796076Abstract: A semiconductor device which is designed to have a plurality of electrodes on an upper surface of a lid portion has a recessed portion which is provided on this upper surface of the lid portion. The recessed portion will accept an electrode after it is bent from its initial position to a position such that the electrode will partially reside in this recessed portion.Type: GrantFiled: February 27, 1987Date of Patent: January 3, 1989Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Ando, Yoshio Takagi
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Patent number: 4746412Abstract: An Fe-P alloy film is electrodeposited on a workpiece in a bath comprising 20-80 g/l ferrous ion, 0.01-15 g/l hypophosphorous acid and/or a hypophosphite, and 0.05-5 g/l aluminum ion or a bath comprising 20-80 g/l ferrous ion and 0.01-20 g/l phosphorous acid and/or a phosphite, and optionally aluminum ion at 10.degree.-80.degree. C. and 0.5-30 A/dm.sup.2. There is obtained a crack-free alloy film having a P content of 0.1 to 9.9 wt %.Type: GrantFiled: July 3, 1986Date of Patent: May 24, 1988Assignees: C. Uyemura & Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Hiroki Uchida, Yosiomi Aoyagi, Tsuyoshi Uotani, Yoshio Takagi, Shinji Kato, Hitoshi Ozawa
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Patent number: 4666786Abstract: A composite nickel plated sliding surface is obtained by the formation of a composite nickel plating film on a sliding surface of an automobile part such as an engine cylinder or piston by electroless nickel plating. The plating film contains at least one member of wear resistant particles having an average particle size of 0.1 to 1.0.mu. selected from SiC, TiC, WC, BC.sub.4, TiN, Al.sub.2 O.sub.3 or the like, and also at least one member of lubricating particles having an average particle size of 1 to 10.mu. selected from BN, MoS.sub.2, and Teflon. The nickel plating bath is adjusted to have a phosphorus concentration of 0.5 to 12%. When the matrix of the nickel plating film has a phosphorus concentration of 0.5 to 5%, the film hardness is improved.Type: GrantFiled: February 27, 1985Date of Patent: May 19, 1987Assignees: Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki KaishaInventors: Hideo Yano, Keiichi Kano, Hitoshi Ozawa, Shinji Kato, Yoshio Takagi
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Patent number: D531324Type: GrantFiled: February 16, 2005Date of Patent: October 31, 2006Assignee: Handy Techno Co., Ltd.Inventor: Yoshio Takagi
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Patent number: D394244Type: GrantFiled: May 24, 1996Date of Patent: May 12, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Gorab Majumdar, Satoshi Mori, Sukehisa Noda, Tooru Iwagami, Yoshio Takagi, Hisashi Kawafuji
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Patent number: D401912Type: GrantFiled: May 28, 1996Date of Patent: December 1, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Gorab Majumdar, Satoshi Mori, Sukehisa Noda, Tooru Iwagami, Yoshio Takagi, Hisashi Kawafuji