Patents by Inventor Satoru Murase
Satoru Murase 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: 6170147Abstract: A starting material which is converted to a continuous body of an oxide superconductor by a heat treatment is filled in a tubular Ag sheath member. The diameter of the filled member is reduced by extrusion to form a wire. The wire is subjected to a heat treatment so that the starting material inside the sheath member is converted to a continuous body of an oxide superconductor. A superconducting wire constituted by the sheath member and the oxide superconductor filled inside the sheath member is obtained. A superconducting coil can be obtained by winding the superconducting wire.Type: GrantFiled: June 5, 1995Date of Patent: January 9, 2001Assignee: Kabushiki Kaisha ToshibaInventors: Yutaka Yamada, Satoru Murase, Hisashi Yoshino, Noburu Fukushima, Hiromi Niu, Shigeo Nakayama, Misao Koizumi
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Patent number: 5935911Abstract: A starting material which is converted to a continuous body of an oxide superconductor by a heat treatment is filled in a tubular Ag sheath member. The diameter of the filled member is reduced by extrusion to form a wire. The wire is subjected to a heat treatment so that the starting material inside the sheath member is converted to a continuous body of an oxide superconductor. A superconducting wire constituted by the sheath member and the oxide superconductor filled inside the sheath member is obtained. A superconducting coil can be obtained by winding the superconducting wire.Type: GrantFiled: June 5, 1995Date of Patent: August 10, 1999Assignee: Kabushiki Kaisha ToshibaInventors: Yutaka Yamada, Satoru Murase, Hisashi Yoshino, Noburu Fukushima, Hiromi Niu, Shigeo Nakayama, Misao Koizumi
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Patent number: 5442137Abstract: A housing is arranged outside a superconducting wire body to enclose it at a predetermined gap. A solder layer and/or a space are formed as a stress relaxation layer between the superconducting wire body and the housing. The gap between a surface of the superconducting wire body, to which a load acts in a direction perpendicular to the longitudinal direction of the superconducting wire body, and a housing material layer, is set to at least 0.25 mm at each side. Alternatively, a solder layer is formed to leave a space between a surface of the superconducting wire body, to which the above load mainly acts, and the housing material layer.Type: GrantFiled: November 22, 1991Date of Patent: August 15, 1995Assignee: Kabushiki Kaisha ToshibaInventors: Satoru Murase, Shigeo Nakayama
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Patent number: 5317007Abstract: A high-Tc oxide superconductor including Bi, Sr, Ca, Cu, O and at least one of Pb and Al, with a high critical temperature than that of liquid nitrogen. A method for producing the high-Tx oxide superconductor is also disclosed, in which Bi.sub.2 O.sub.3, SrCO.sub.3, CaCO.sub.3, CuO and PbO or Al.sub.2 O.sub.3 powders are mixed, calcined, ground, cold-pressed and sintered. The calcined mixture may be melted and annealed to obtain a tape-form superconductor.Type: GrantFiled: June 29, 1992Date of Patent: May 31, 1994Assignee: Kabushiki Kaisha ToshibaInventors: Yutaka Yamada, Satoru Murase
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Patent number: 5145831Abstract: A high-Tc oxide superconductor including Bi, Sr, Ca, Cu, O and at least one of Pb and Al, with a high critical temperature than that of liquid nitrogen. A method for producing the high-Tc oxide superconductor is also disclosed, in which Bi.sub.2 O.sub.3, SrCO.sub.3, CaCO.sub.3, CuO and PbO or Al.sub.2 O.sub.3 powders are mixed, calcined, ground, cold-pressed and sintered. The calcined mixture may be melted and annealed to obtain a tape-form superconductor.Type: GrantFiled: February 23, 1989Date of Patent: September 8, 1992Assignee: Kabushiki Kaisha ToshibaInventors: Yutaka Yamada, Satoru Murase
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Patent number: 5100481Abstract: A composite member is prepared which comprises a core which will have a compound superconducting layer when heat-treated, and a stock for forming a stabilizing member made of copper and surrounding the core. The composite member is heat-treated in an oxidizing atmosphere, thus forming a copper-oxide thin layer on the surface of the stock. Thereafter, the composite member is heat-treated in a non-oxidizing atmosphere or in an atmosphere having an oxygen partial pressure which is too low to allow the forming of copper oxide. As a result, a compound superconducting wire is made which comprises a member including a compound superconductor, a diffusion-preventing layer made of oxide and surrounding the member, and a stabilizing member made of copper and surrounding the layer.Type: GrantFiled: October 26, 1990Date of Patent: March 31, 1992Assignee: Kabushiki Kaisha ToshibaInventors: Shigeo Nakayama, Hachio Shiraki, Satoru Murase
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Patent number: 4990411Abstract: A composite member is prepared which comprises a core which will have a compound superconducting layer when heat-treated, and a stock for forming a stabilizing member made of copper and surrounding the core. The composite member is heat-treated in an oxidizing atmosphere, thus forming a copper-oxide thin layer on the surface of the stock. Thereafter, the composite member is heat-treated in a non-oxidizing atmosphere or in an atmosphere having an oxygen partial pressure which is too low to allow the forming of copper oxide. As a result, a compound superconducting wire is made which comprises a member including a compound superconductor, a diffusion-preventing layer made of oxide and surrounding the member, and a stabilizing member made of copper and surrounding the layer.Type: GrantFiled: June 9, 1989Date of Patent: February 5, 1991Assignee: Kabushiki Kaisha ToshibaInventors: Shigeo Nakayama, Hachio Shiraki, Satoru Murase, Keizo Shimamura, Yoshiko Kohanawa
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Patent number: 4776899Abstract: An improved multifilament superconductor is fabricated by the method in which a tin rod or tin based alloy rod is clad with a copper based alloy tube, the thus obtained copper-clad rod is further clad with a niobium based alloy tube, and a copper material is applied as a stabilizer on an outer peripheral surface of the niobium based alloy tube to form a composite. This composite is then reduced and thermally treated at a temperature ranging from 640.degree. to 770.degree. C. to thereby form an Nb.sub.3 Sn superconductor composite with a filament tube therein. At least one of the copper based alloy tube and the niobium based alloy tube contains 0.1-5.0 at. % titanium, and in addition, the tin based alloy rod may contain 0.1-3.5 at. % titanium. The tin is contained in the copper-clad rod at weight % of about 25-85, preferably 30-80 weight %.Type: GrantFiled: June 15, 1987Date of Patent: October 11, 1988Assignees: Kabushiki Kaisha Toshiba, Showa Electric Wire and Cable Company LimitedInventors: Satoru Murase, Hachio Shiraki, Eigen Suzuki, Masamitsu Ichihara, Yoshimasa Kamisada, Nobuo Aoki, Tomoyuki Kumano
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Patent number: 4746373Abstract: A powder having a predetermined composition is filled in a tube. The tube is drawn to obtain a wire and the wire is rolled to obtain a tape-like starting body. Then, a laser beam is irradiated on the part of the tape to heat and melt the part of the tape. The starting body is rapidly heated and then cooled, thereby the part of the starting body is melted and solidified to form a compound superconductor layer.Type: GrantFiled: May 14, 1986Date of Patent: May 24, 1988Assignees: Kabushiki Kaisha Toshiba, National Research Institute for MetalsInventors: Yutaka Yamada, Satoru Murase, Mitsuo Sasaki, Ei Nakamura, Hiroaki Kumakura, Kazumasa Togano, Kyoji Tachikawa
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Patent number: 4595898Abstract: A compound-superconducting coil of the type including a plurality of superconducting wires in a tube and forcing a coolant through the tube. The subject compound-superconducting coil comprises a plurality of compound-superconducting wires and a tube for receiving the plural wires. Void spaces are provided in the interior of the tube to allow for the passage of a coolant. The void fraction is 45% to 70% of the tube interior. The subject compound-superconducting coil, when brought to a superconducting condition, allows for the passage of a current whose magnitude accounts for at least 80% of a critical current observed when the wire is strain-free state.Type: GrantFiled: May 4, 1984Date of Patent: June 17, 1986Assignee: Kabushiki Kaisha ToshibaInventors: Hachio Shiraki, Satoru Murase
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Patent number: 4586012Abstract: A superconductor for a pulsed magnet has a wire assembly including a plurality of superconducting wires individually bonded with a solder. The solder consists of an Sn-Pb alloy containing indium and/or bismuth. When this solder is used, a coupling current induced between the superconducting wires can be reduced to an acceptable value.Type: GrantFiled: July 16, 1984Date of Patent: April 29, 1986Assignee: Kabushiki Kaisha ToshibaInventors: Misao Koizumi, Satoru Murase
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Patent number: 4508578Abstract: A method of manufacturing a fine multifilamentary Nb-Ti based superconducting wire was disclosed, which comprises a first step of processing an alloy consisting essentially of 10 to 50 atomic % of niobium, 40 to 75 atomic % of titanium and no higher than 30 atomic % of least one element selected from a group consisting of hafnium, tantalum and tungsten to form an alloy wire, a second step of covering said alloy wire with a stabilizer, cold drawing the resultant wire, bundling a plurality of stabilizer-clad wires thus obtained, covering the bundle of wires with a stabilizer, and extruding and cold drawing the resultant bundled wire to thereby form a multifilamentary wire, and a third step of thermally treating the resultant multifilamentary wire at a temperature of 250.degree. to 600.degree. C. and drawing the resultant treated multifilamentary wire to a reduction rate of 30 to 99.9%. The third step is carried out more than once.Type: GrantFiled: November 29, 1983Date of Patent: April 2, 1985Assignees: National Research Institute, Tokyo Shibaura Denki Kabushiki KaishaInventors: Hitoshi Wada, Kyoji Tachikawa, Yutaka Yamada, Satoru Murase