Patents by Inventor Hiromi Kagohara
Hiromi Kagohara 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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Patent number: 5634977Abstract: The invention relates to a molten metal plating apparatus comprising a roller rotatably supported by a bearing in a molten metal bath, the roller having a shaft sliding portion, the bearing having a sliding portion, both the shaft sliding portion and the sliding portion being made of ceramic sintered body, at least one of both the shaft of the roller and the bearing being made of a ceramic sintered body containing a solid lubricating material. The invention also relates to a die casting machine having a sleeve and a plunger tip both made of ceramic sintered bodies at least one of which contains a solid lubricating material. The bearing for the roller, the sleeve and the tip may be formed of a composite body having a ceramic sintered body portion and and a metal portion secured and fitted thereto by an intermediate member which is elastically and plastically deformed at the time of the usage. The composite structure formed by fitting is usable for other applications.Type: GrantFiled: July 13, 1994Date of Patent: June 3, 1997Assignee: Hitachi, Ltd.Inventors: Takahiko Ookouchi, Hiromi Kagohara, Hiromu Hama, Mitsuo Nakagawa, Hitoshi Okoshi, Yoshitaka Nakayama
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Patent number: 5380264Abstract: A molten metal plating apparatus includes a roller rotatably supported by a bearing in a molten metal bath, the roller having a shaft sliding portion, the bearing having a sliding portion, both the shaft sliding portion and the sliding portion being made of ceramic sintered body, at least one of both the shaft of the roller and the bearing being made of a ceramic sintered body containing a solid lubricating material. The bearing for the roller, the sleeve and the tip may be formed of a composite body having a ceramic sintered body portion and and a metal portion secured and fitted thereto by an intermediate member which is elastically and plastically deformed at the time of the usage.Type: GrantFiled: December 30, 1992Date of Patent: January 10, 1995Assignee: Hitachi, Ltd.Inventors: Takahiko Ookouchi, Hiromi Kagohara, Hiromu Hama, Mitsuo Nakagawa, Hitoshi Okoshi, Yoshitaka Nakayama
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Patent number: 5252130Abstract: The invention relates to a molten metal plating apparatus including a roller rotatably supported by a bearing in a molten metal bath, the roller having a shaft sliding portion, the bearing having a sliding portion, both the shaft sliding portion and the sliding portion being made of ceramic sintered body, at least one of both the shaft of the roller and the bearing being made of a ceramic sintered body containing a solid lubricating material. The invention also relates to a die casting machine having a sleeve and a plunger tip both made of ceramic sintered bodies at least one of which contains a solid lubricating material. The bearing for the roller, the sleeve and the tip may be formed of a composite body having a ceramic sintered body portion and and a metal portion secured and fitted thereto by an intermediate member which is elastically and plastically deformed at the time of the usage. The composite structure formed by fitting is usable for other applications.Type: GrantFiled: September 17, 1990Date of Patent: October 12, 1993Assignee: Hitachi, Ltd.Inventors: Takahiko Ookouchi, Hiromi Kagohara, Hiromu Hama, Mitsuo Nakagawa, Hitoshi Okoshi, Yoshitaka Nakayama
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Patent number: 5040398Abstract: A rolling roll comprises a metal rolling roll body, a ceramic sleeve into which the roll body is inserted with a gap therebetween, thereby providing a working surface of ceramics at an outer periphery thereof, fasteners provided on the roll body at both sides of the sleeve for pressing the side faces of the sleeve thereby to fix the sleeve to the roll body, and at least one spacer having a larger coefficient of thermal expansion than that of the roll body and inserted between the sleeve and the fastener so that the sleeve is axially pressed by the fastener to fix the sleeve to the roll body.Type: GrantFiled: October 16, 1989Date of Patent: August 20, 1991Assignee: Hitachi, Ltd.Inventors: Mitsuo Nakagawa, Mitsuo Taguchi, Hiromi Kagohara
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Patent number: 4981761Abstract: A ceramic and metal bonded composite comprising an intermediate metal plate interposed between a ceramic member and a metal member and brazed thereto, the intermediate metal plates carries on its juncture surface a central square projection having substantial area, pins arranged near the four corners and fins between the corners, the central square projection mechanically and thermally couples the ceramic member and the metal member together with the brazing layer and the pins and fins also mechanically and thermally couple the both members together with the brazing layer, while permitting relative displacement between the both members through their plastic deformation, thereby preventing crack generation in the ceramic member.Type: GrantFiled: May 31, 1989Date of Patent: January 1, 1991Assignee: Hitachi, Ltd.Inventors: Takahiko Ookouchi, Hiromi Kagohara
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Patent number: 4891831Abstract: A method for generating X-rays in an X-ray tube, comprises the steps of: rotating an X-ray target of a rotating anode, the X-ray target having a metal coated layer thereon; applying electron beams emitted from a cathode onto the metal coated layer of the X-ray target; and offsetting thermal deformation of the X-ray target due to the application of the electron beams by deformation of the X-ray target due to centrifugal force, thereby maintaining a position of the X-ray target in a direction of the application of the electron beams, at a room temperature of the X-ray target, thus generating the X-rays.Type: GrantFiled: July 21, 1988Date of Patent: January 2, 1990Assignee: Hitachi, Ltd.Inventors: Akira Tanaka, Satoshi Shimada, Kazuji Yamada, Yusaku Nakagawa, Motohisa Nishihara, Tadahiko Miyoshi, Noboru Baba, Hiromi Kagohara, Ichiro Inamura
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Patent number: 4729010Abstract: An integrated circuit package in which semiconductor elements mounted on an insulating substrate, ends of lead pieces introduced from the outside and wires that electrically connect them, are accommodated in a cell that is air-tightly defined by the substrate, a cap and a sealing glass. The lead pieces are composed of an alloy having a coefficient of thermal expansion nearly equal to, or smaller than, the coefficient of thermal expansion of the substrate. The alloy is an iron alloy which contains nickel and cobalt, and having a martensite transformation temperture of lower than -55.degree. C.Type: GrantFiled: July 30, 1986Date of Patent: March 1, 1988Assignee: Hitachi, Ltd.Inventors: Masatoshi Tsuchiya, Satoru Ogihara, Hiromi Kagohara, Kanji Otsuka, Tomoji Oishi
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Patent number: 4615658Abstract: This invention relates to an improvement on material of a shroud for gas turbines. The material comprises 0.25-0.7 wt % C, 20-35 wt % Cr, 20-40 wt % Ni and balance Fe, and has an austenitic structure. The amount of the .sigma.-phase in this invention is less than 5% and Nv value (Electron Vacancy Number) is less than 2.8.Type: GrantFiled: July 11, 1985Date of Patent: October 7, 1986Assignee: Hitachi, Ltd.Inventors: Hiromi Kagohara, Yutaka Fukui, Masahiko Sakamoto, Nobuyuki Iizuka
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Patent number: 4465530Abstract: Disclosed in a gas turbine nozzle having a superior thermal fatigue resistance. The gas turbine nozzle is made of a cast alloy consisting essentially of 0.1 to 1 wt % carbon, 0.1 to 2 wt % silicon, 0.1 to 2 wt % manganese, 20 to 35 wt % chromium, 0.001 to 0.1 wt % boron, 5 to 15 wt % of at least one of tungsten and molybdenum, 16 to 35 wt % cobalt and the balance nickel. The alloy has a heat-treated structure in which eutectic carbides and secondary carbides are dispersed in the matrix.Type: GrantFiled: September 8, 1982Date of Patent: August 14, 1984Assignee: Hitachi, Ltd.Inventors: Hiromi Kagohara, Nobuyuki Iizuka, Yutaka Fukui, Masahiko Sakamoto
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Patent number: 4283234Abstract: A gas turbine nozzle made of a cast material having a chemical composition which contains 0.2 to 1 wt% carbon, 0.1 to 2 wt% silicon, 0.1 to 2 wt% manganese, 20 to 40 wt% chromium, 0.001 to 0.1 wt% boron, 5 to 20 wt% of at least one of tungsten and molybdenum and the remainder nickel. The material can contain at least one of carbide former which forms MC type carbides, e.g. titanium, niobium, hafnium, tantalum, zirconium and vanadium. The content of the carbide formers is between 0.1 and 2 wt%. Further, the material can contain 0.005 to 2 wt% of at least one of yttrium and aluminum. The material has a heat-treated structure in which eutectic carbides and secondary carbides are dispersed. The gas turbine nozzle made of this cast material exhibits a strength against thermal shock greater than that of conventional gas turbine nozzle made of a cobalt base alloy.Type: GrantFiled: December 12, 1979Date of Patent: August 11, 1981Assignee: Hitachi, Ltd.Inventors: Yutaka Fukui, Hiromi Kagohara