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Kato Takahiko, Aihara Katsuzo, Kuniya Jiro, Misawa Yutaka, Wadayama Yoshihide, Ogihara Masahiro, Nishino Toshikazu, Kawabe Ushio, Hasegawa Haruhiro Hitachi Dain, Takagi Kazumasa, Fukazawa Tokuumi, Miyauchi Katsuki: Process for controlling oxygen content of superconductive oxide, superconductive device and process for production thereof.. Hitachi, October 12, 1988: EP0286106-A2 (16 worldwide citation)

A process for controlling an oxygen content of a non-superconductive or superconductive oxide is provided, in which a beam of particles such as ions, electrons or neutrons or an electromagnetic radiation is applied to the non-superconductive or superconductive oxide of a perovskite type such as YBa2 ...


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Kato Takahiko, Ito Motoya: Fuel pump.. Nippon Denso Co, October 6, 1993: EP0563957-A1 (9 worldwide citation)

A Westco type fuel pump includes an impeller (32) which has a plurality of vane grooves (322) and a plurality of vane plates (323) provided alternately along its outer periphery. Each vane groove (322) is constituted by groove portions (322a, 322b) formed in both sides of the impeller (32), respecti ...


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Kato Takahiko, Yoshinari Akira, Ikeda Shinzoo, Yamamoto Michiyoshi, Kodama Hidyo, Sato Hisashi, Izumiya Masakiyo, Aono Yasuhisa: Austenitic steel having superior characteristics in resistance against stress corrosion cracking, method for producing of same and usage of same.. Hitachi, September 18, 1991: EP0447109-A1 (8 worldwide citation)

The present invention relates to an austenitic steel comprising Ni of 9 - 30 %, Cr of 10 - 23 %, and Fe of at least 45 %, which is characterized in comprising enough Cr and Ni to form whole austenitic structure in the equilibrium diagram at 700 DEG C, having austenitic phase at room temperature, and ...


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Ito Motoya, Kato Takahiko, Yasuda Minoru: Westco pump with noise supression structure. Nippon Denso Co, January 3, 1996: EP0690233-A1 (4 worldwide citation)

In order to reduce noise generated in a westco pump when fluid hits a finishing end of a pump channel, finishing ends (32a, 33a) of grooves (32, 33) formed in a side wall (17) of a casing body (18) and a casing cover (19) to form a pump channel (31) are shifted by an amount equal to 1/2 of the pitch ...


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Kato Takahiko, Kuniya Jiro, Imagawa Takao, Aihara Katsuzo: Magnetic head and magnetic recording apparatus.. Hitachi, September 26, 1990: EP0389222-A2 (3 worldwide citation)

In a magnetic recording apparatus with a magnetic head, superconductive layers (6, 17, 106) are formed over at least flux generating surfaces of the magnetic head and normal conductive regions (8, 21, 108) for passing the flux are provided in the superconductive layers, over the flux generating surf ...


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Kato Takahiko, Ikeda Shinzo, Aono Yasuhisa, Izumiya Masakiyo, Nakata Kiyotomo, Masaoka Isao, Takahashi Heishichiro: Austenitic stainless steel having superior resistance to irradiation-induced segregation.. Hitachi, March 10, 1993: EP0530725-A1 (3 worldwide citation)

There is provided an austenitic stainless steel which is corrosion-resistant in an environment of neutron irradiation, and can suppress stress corrosion cracking and embrittlement. At least one kind of additive selected from Ti more than 0.2 % by weight up to 0.6 %, Zr more than 0.2 % up to 1.14%, H ...


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Chigasaki Mitsuo, Matsushita Shizuo, Kuniya Jiro, Kiyotoki Yoshihisa, Kato Takahiko, Chiba Yoshiteru: Valve bonded with corrosion and wear proof alloy and apparatus using said valve. Hitachi, August 29, 2001: EP1128103-A2 (3 worldwide citation)

The object of the present invention is to provide a valve characterized by excellent corrosion and wear resistance and maintainability by bonding corrosion and wear proof alloy containing non-continuously distributed eutectic carbide to the sliding portions of various types of apparatuses and valves ...


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Kato Takahiko, Ito Motoya: Westco-type pump.. Nippon Denso Co, October 5, 1994: EP0618367-A1 (3 worldwide citation)

A disk-shaped impeller (42) having on its periphery a multiple radial vanes (56) and a multiple radial impeller grooves (58) is rotatably disposed in a pump housing. On each end surfaces (42a, 42b) of the impeller (42) there are formed a plurality of C-shaped grooves (66). As the impeller (42) is ro ...