Patents by Inventor Takato Machi
Takato Machi 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: 20240079162Abstract: A purpose of the present invention is to provide a coated conductor having a high critical current and low AC loss. The high-temperature superconducting coated conductor that achieves this purpose has an elongated first metal substrate, and multiple filaments arranged on the first metal substrate so as to extend in a longitudinal direction of the first metal substrate. The multiple filaments are arranged approximately in parallel with gaps therebetween, and each filament includes, in order from the first metal substrate side, a first superconducting layer containing a rare earth element, first stabilizing layers, second stabilizing layers, and a second superconducting layer containing a rare earth element.Type: ApplicationFiled: January 17, 2022Publication date: March 7, 2024Inventors: Takato MACHI, Teruo IZUMI
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Patent number: 9824796Abstract: An oxide superconductor includes: a substrate made of a metal; an insulating intermediate layer provided on the substrate; an oxide superconducting layer provided on the intermediate layer; a metal stabilizing layer provided on the oxide superconducting layer; and a plurality of dividing grooves which divide the metal stabilizing layer and the oxide superconducting layer along a longitudinal direction of the substrate, reach the inside of the intermediate layer through the oxide superconducting layer from the metal stabilizing layer, and do not reach the substrate. The metal stabilizing layer and the oxide superconducting layer are divided to form a plurality of filament conductors by the plurality of dividing grooves, and in each dividing groove of the plurality of dividing grooves, a width of a groove opening portion of the dividing groove is equal to or greater than a width of a groove bottom portion of the dividing groove.Type: GrantFiled: May 28, 2014Date of Patent: November 21, 2017Assignees: FUJIKURA LTD., SWCC SHOWA CABLE SYSTEMS CO., LTD., FURUKAWA ELECTRIC CO., LTD.Inventors: Takato Machi, Tomo Yoshida, Tatsunori Nakamura, Kota Katayama, Koichi Nakao, Keiichi Tanabe
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Publication number: 20160125977Abstract: An oxide superconductor includes: a substrate made of a metal; an insulating intermediate layer provided on the substrate; an oxide superconducting layer provided on the intermediate layer; a metal stabilizing layer provided on the oxide superconducting layer; and a plurality of dividing grooves which divide the metal stabilizing layer and the oxide superconducting layer along a longitudinal direction of the substrate, reach the inside of the intermediate layer through the oxide superconducting layer from the metal stabilizing layer, and do not reach the substrate. The metal stabilizing layer and the oxide superconducting layer are divided to form a plurality of filament conductors by the plurality of dividing grooves, and in each dividing groove of the plurality of dividing grooves, a width of a groove opening portion of the dividing groove is equal to or greater than a width of a groove bottom portion of the dividing groove.Type: ApplicationFiled: May 28, 2014Publication date: May 5, 2016Applicants: International Superconductivity Technology Center, FUJIKURA LTD., SWCC SHOWA CABLE SYSTEMS CO., LTD., FURUKAWA ELECTRIC CO., LTD.Inventors: Takato MACHI, Tomo YOSHIDA, Tatsunori NAKAMURA, Kota KATAYAMA, Koichi NAKAO, Keiichi TANABE
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Publication number: 20120245034Abstract: A low AC-loss multi-filament superconducting wire material of the invention includes an elongated base material, an intermediate layer formed on the base material; a superconducting layer formed on the intermediate layer, and a metal stabilizing layer formed on the superconducting layer, wherein a plurality of grooves extending along a long direction of the base material is formed in parallel in a width direction of the base material, and reach the intermediate layer from the metal stabilizing layer via the superconducting layer to expose the intermediate layer; and a difference ?d (=d1?d2) between a width d1 of the grooves at a lower part of the superconducting layer and a width d2 of the grooves at a lower part of the metal stabilizing layer is not more than 10 ?m.Type: ApplicationFiled: April 26, 2012Publication date: September 27, 2012Applicants: FUJIKURA LTD., INTERNATIONAL SUPERCONDUCTIVITY TECHNOLOGY CENTERInventors: Takato MACHI, Hiroshi TOBITA, Yasuo TAKAHASHI, Keiichi TANABE, Teruo IZUMI
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Patent number: 7964532Abstract: An RE123-based oxide superconductor characterized by comprising a conductive layer containing an REBa2Cu3O7-?-based oxide superconductor formed using a mixed material of at least RE2BaO4 and a Bax—Cuy—Oz-based material and a holding member which holds said conductive layer, where, RE is one type or more of elements selected from La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, and Y.Type: GrantFiled: March 31, 2006Date of Patent: June 21, 2011Assignee: International Superconductivity Technology Center, The Juridical FoundationInventors: Shoji Tanaka, Naomichi Sakai, Takato Machi, Muralidhar Miryala
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Publication number: 20090270260Abstract: An RE123-based oxide superconductor characterized by comprising a conductive layer containing an REBa2Cu3O7-?-based oxide superconductor formed using a mixed material of at least RE2BaO4 and a Bax—Cuy—Oz-based material and a holding member which holds said conductive layer, where, RE is one type or more of elements selected from La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, and Y.Type: ApplicationFiled: March 31, 2006Publication date: October 29, 2009Inventors: Shoji Tanaka, Naomichi Sakai, Takato Machi, Muralidhar Miryala
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Patent number: 7417425Abstract: A continuous observation apparatus of magnetic flux distribution in which a long sample containing a superconducting material or magnetic material is transferred to an observation position and magnetic flux is observed sequentially at each of certain areas along a longitudinal direction of the sample is provided. A method of continuously observing magnetic flux by which a long sample containing a superconducting material or magnetic material is transferred to an observation position and magnetic flux is observed sequentially at each of certain areas along a longitudinal direction of the sample is also provided.Type: GrantFiled: September 5, 2006Date of Patent: August 26, 2008Assignees: International Superconductivity Technology Center,the Juridical foundation, Fujikura Ltd.Inventors: Takato Machi, Noriko Chikumoto, Koichi Nakao, Hiroshi Fuji, Yutaka Kitoh, Teruo Izumi, Yuh Shiohara
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Publication number: 20070108974Abstract: A continuous observation apparatus of magnetic flux distribution in which a long sample containing a superconducting material or magnetic material is transferred to an observation position and magnetic flux is observed sequentially at each of certain areas along a longitudinal direction of the sample is provided. A method of continuously observing magnetic flux by which a long sample containing a superconducting material or magnetic material is transferred to an observation position and magnetic flux is observed sequentially at each of certain areas along a longitudinal direction of the sample is also provided.Type: ApplicationFiled: September 5, 2006Publication date: May 17, 2007Inventors: Takato Machi, Noriko Chikumoto, Koichi Nakao, Hiroshi Fuji, Yutaka Kitoh, Teruo Izumi, Yuh Shiohara
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Patent number: 6953770Abstract: The present invention relates to an MgB2-based superconductor that is easy to manufacture and well suited to mass production, and that exhibits excellent superconducting characteristics (such as a high critical current density) while still retaining the high critical temperature characteristics of MgB2. A powder mixture of magnesium, boron, and titanium is pressed into a pellet, and this product is sintered under an atmospheric pressure and other conditions (preferably at 600° C. or higher) to manufacture an MgB2-based superconductor in which titanium and/or a titanium compound are dispersed in polycrystalline MgB2. The composition of the MgB2-based superconductor is preferably adjusted to have an atomic ratio of Mg:B:Ti=x:2:y, 0.7<x<1.2 and 0.05<y<0.3, and more preferably 0.07<y<0.2, by adjusting the amounts in which the raw materials are added.Type: GrantFiled: May 10, 2002Date of Patent: October 11, 2005Assignee: International Superconductivity Technology Center, The Juridical FoundationInventors: Yong Zhao, Yong Feng, Yuan Wu, Takato Machi, Yasunori Fudamoto, Naoki Koshizuka, Masato Murakami
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Publication number: 20040092403Abstract: The present invention relates to an MgB2-based superconductor that is easy to manufacture and well suited to mass production, and that exhibits excellent superconducting characteristics (such as a high critical current density) while still retaining the high critical temperature characteristics of MgB2. A powder mixture of magnesium, boron, and titanium is pressed into a pellet, and this product is sintered under an atmospheric pressure and other conditions (preferably at 600° C. or higher) to manufacture an MgB2-based superconductor in which titanium and/or a titanium compound are dispersed in polycrystalline MgB2. The composition of the MgB2-based superconductor is preferably adjusted to have an atomic ratio of Mg:B:Ti=x:2:y, 0.7<x<1.2 and 0.05<y<0.3, and more preferably 0.07<y<0.2, by adjusting the amounts in which the raw materials are added.Type: ApplicationFiled: January 22, 2003Publication date: May 13, 2004Inventors: Yong Zhao, Yong Feng, Yuan Wu, Takato Machi, Yasunori Fudamoto, Naoki Koshizuka, Masato Murakami
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Patent number: 5286713Abstract: A superconducting circuit board is provided comprising a sintered alumina board containing more than 99% by weight of alumina and an interconnection pattern of an superconducting ceramics formed on the alumina board. Adhesion of the interconnection pattern to the alumina board is improved by an addition of Ti or Si coupling agent to a paste for forming the interconnection pattern. The use of copper powder in place of copper oxide powder as an ingredient forming a superconducting ceramics in the paste is advantageous for printing and obtaining a uniform superconducting ceramic pattern.Type: GrantFiled: May 21, 1993Date of Patent: February 15, 1994Assignee: Fujitsu LimitedInventors: Hiromitsu Yokoyama, Yoshihiko Imanaka, Kazunori Yamanaka, Nobuo Kamehara, Koichi Niwa, Takuya Uzumaki, Hitoshi Suzuki, Takato Machi
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Patent number: 5081070Abstract: A superconducting circuit board is provided comprising a sintered alumina board containing more than 99% by weight of alumina and an interconnection pattern of an superconducting ceramics formed on the alumina board. Adhesion of the interconnection pattern to the alumina board is improved by an addition of Ti or Si coupling agent to a paste for forming the interconnection pattern. The use of copper powder in place of copper oxide powder as an ingredient forming a superconducting ceramics in the paste is advantageous for printing and obtaining a uniform superconducting ceramic pattern.Type: GrantFiled: January 30, 1989Date of Patent: January 14, 1992Assignee: Fujitsu LimitedInventors: Hiromitsu Yokoyama, Yoshihiko Imanaka, Kazunori Yamanaka, Nobuo Kamehara, Koichi Niwa, Takuya Uzumaki, Hitoshi Suzuki, Takato Machi
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Patent number: 4954480Abstract: A multi-layer superconducting circuit substrate, including insulating layers, and interconnection patterns of a superconductive ceramic material located between the insulating layers, the patterns of the superconductive ceramic material being connected via through-holes of the superconductive ceramic material, is provided. The patterns of the superconductive ceramic material are preferably encapsulated with a metal of gold, silver, platinum or an alloy thereof.Type: GrantFiled: April 27, 1988Date of Patent: September 4, 1990Assignee: Fujitsu LimitedInventors: Yoshihiko Imanaka, Takato Machi, Kazunori Yamanaka, Hiromitsu Yokoyama, Nobuo Kamehara, Koichi Niwa