Patents by Inventor Hideki Kita
Hideki Kita 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: 11956643Abstract: A station placement design method includes: extracting candidates for an installation location of a wireless base station from point group data in accordance with designated conditions for an installation location of a wireless base station; determining presence/absence of visibility between a plurality of designated wireless terminal stations and the candidates for an installation location of a wireless base station based on the point group data and generating a first list including information in which the candidates for an installation location of a wireless base station and wireless terminal stations determined to have presence of visibility for the candidates for an installation location of a wireless base station are associated with each other; generating a second list including information representing combinations of the candidates for an installation location of a wireless base station that enable all of the plurality of designated wireless terminal stations to be accommodated based on the first listType: GrantFiled: January 15, 2020Date of Patent: April 9, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hideki Toshinaga, Naoki Kita, Yushi Shirato, Hideyuki Tsuboi, Kazuto Goto
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Patent number: 11916610Abstract: An interference evaluation method for evaluating, over an area, radio-wave interference that occurs between a first radio station and a second radio station includes: a distinguishing step of acquiring information indicating topographic cross-sections of respective azimuths centered about the first radio station, and distinguishing the topographic cross-section into a segment in which there is visibility from the position of the first radio station and a segment in which there is no visibility from the position of the first radio station; and a specification step of specifying a position at which a desired interference amount is reached based on a distance between the first radio station and the second radio station in a segment distinguished as having visibility from the position of the first radio station, and specifying a position at which the desired interference amount is reached by evaluating the radio-wave interference for each square of an evaluation target region segmented into squares in a segment dType: GrantFiled: March 11, 2020Date of Patent: February 27, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hideyuki Tsuboi, Hideki Toshinaga, Kazuto Goto, Yushi Shirato, Naoki Kita
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Patent number: 10796807Abstract: A nuclear reactor fuel rod is a fuel rod for a light-water reactor. The nuclear reactor fuel rod includes a fuel cladding tube and an end plug, both of which are formed of a silicon carbide material. A bonding portion between the fuel cladding tube and the end plug is formed by brazing with a predetermined metal bonding material interposed, and/or by diffusion bonding. The predetermined metal bonding material has a solidus temperature of 1200° C. or higher. An outer surface of the bonding portion, and a portion of an outer surface of the fuel cladding tube and the end plug, which is adjacent to the outer surface of the bonding portion are covered by bonding-portion coating formed of a predetermined coating metal. The predetermined metal bonding material and the predetermined coating metal have an average linear expansion coefficient which is less than 10 ppm/K.Type: GrantFiled: November 26, 2014Date of Patent: October 6, 2020Assignee: HITACHI, LTD.Inventors: Ryou Ishibashi, Kinya Aota, Xudong Zhang, Hideki Kita, Seiji Yamashita
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Publication number: 20170330638Abstract: A nuclear reactor fuel rod is a fuel rod for a light-water reactor. The nuclear reactor fuel rod includes a fuel cladding tube and an end plug, both of which are formed of a silicon carbide material. A bonding portion between the fuel cladding tube and the end plug is formed by brazing with a predetermined metal bonding material interposed, and/or by diffusion bonding. The predetermined metal bonding material has a solidus temperature of 1200° C. or higher. An outer surface of the bonding portion, and a portion of an outer surface of the fuel cladding tube and the end plug, which is adjacent to the outer surface of the bonding portion are covered by bonding-portion coating formed of a predetermined coating metal. The predetermined metal bonding material and the predetermined coating metal have an average linear expansion coefficient which is less than 10 ppm/K.Type: ApplicationFiled: November 26, 2014Publication date: November 16, 2017Applicant: Hitachi, Ltd.Inventors: Ryou ISHIBASHI, Kinya AOTA, Xudong ZHANG, Hideki KITA, Seiji YAMASHITA
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Patent number: 9211600Abstract: A bonded, boron carbide-containing ceramic body includes ceramic members. These ceramic members each contain boron carbide at 2 mass % or higher, and are integrated together via a bonding layer bonded with a bonding material containing at least one metal selected from the group consisting of aluminum, copper, gold and zirconium or integrated together via a bonding layer formed from one of aluminum metal and an aluminum compound and a titanium compound as bonding materials, wherein a bonded part has a strength of 100 MPa or higher. According to this technology, the boron carbide-containing ceramic members can be bonded together with a high strength of 100 MPa or more by a simple process, and further, the bonding is feasible with excellent chemical resistance at the bonded part as needed.Type: GrantFiled: August 30, 2011Date of Patent: December 15, 2015Assignee: MINO CERAMIC CO., LTD.Inventors: Kiyoto Sekine, Takeshi Kumazawa, Hideki Kita, Hideki Hyuga
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Publication number: 20130157835Abstract: A bonded, boron carbide-containing ceramic body includes ceramic members. These ceramic members each contain boron carbide at 2 mass % or higher, and are integrated together via a bonding layer bonded with a bonding material containing at least one metal selected from the group consisting of aluminum, copper, gold and zirconium or integrated together via a bonding layer formed from one of aluminum metal and an aluminum compound and a titanium compound as bonding materials, wherein a bonded part has a strength of 100 MPa or higher. According to this technology, the boron carbide-containing ceramic members can be bonded together with a high strength of 100 MPa or more by a simple process, and further, the bonding is feasible with excellent chemical resistance at the bonded part as needed.Type: ApplicationFiled: August 30, 2011Publication date: June 20, 2013Applicant: MINO CERAMIC CO., LTD.Inventors: Kiyoto Sekine, Takeshi Kumazawa, Hideki Kita, Hideki Hyuga
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Patent number: 8049976Abstract: The present invention relates to an optical part holding member made of ceramic and a production method thereof, and provides an optical part holding member made of ceramic such that a sintered body after processes of degreasing and sintering has small dimensional changes over dimensions of a mold, and a production method thereof. An example includes a lens holder to hold an optical part, made of a silicon nitride ceramic base composite material produced through a process in which silicon and nitrogen are reacted to be nitrided and contains silicon carbide and an iron compound.Type: GrantFiled: May 13, 2010Date of Patent: November 1, 2011Assignees: FUJIFILM Corporation, National Institute of Advanced Industrial Science and TechnologyInventors: Ikuo Taki, Hideki Hyuga, Hideki Kita, Yasunori Tanaka
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Publication number: 20110132793Abstract: There is provided a container which can accommodate an object inside an internal space shaped by an inner surface of the container. The inner surface substantially has a shape of a sphere, a semiregular polyhedron or a dual polyhedron of a semiregular polyhedron. The inner surface is formed by plural segmented members made of a refractory material.Type: ApplicationFiled: June 19, 2009Publication date: June 9, 2011Applicant: National Institute of Advanced Industrial Science and TechnologyInventors: Hideki Kita, Hideki Hyuga, Naoki Kondo
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Patent number: 7952820Abstract: The present invention relates to an optical part holding member made of ceramic and a production method thereof, and provides an effective permeability to prevent dew condensation. The optical part holding member is made of a silicon nitride ceramic base composite material to hold an optical part, which is produced through a process of nitriding in which silicon is caused to react with nitrogen. By using the silicon nitride ceramic base composite material containing silicon carbide and an iron compound, an airflow volume of 50 ml or more per minute is achieved in an effective airflow area of 1.5 cm2 when an air pressure is added with a pressure difference of 0.4 MPa between both surfaces of a sample of the silicon nitride ceramic base composite material having 1 mm thickness, and the optical part holding member having effective permeability to prevent dew condensation is obtained.Type: GrantFiled: May 18, 2010Date of Patent: May 31, 2011Assignees: FUJIFILM Corporation, National Institute of Advanced Industrial Science and TechnologyInventors: Ikuo Taki, Hideki Hyuga, Hideki Kita, Yasunori Tanaka
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Patent number: 7855162Abstract: The present invention provides a needle-shaped ceramic body and needle-shaped ceramic catalyst body in which a base material is a high specific surface area porous cordierite body that is stable at high temperatures, and also provides methods of producing this needle-shaped ceramic body and needle-shaped ceramic catalyst body. The present invention relates to a needle-shaped ceramic body and needle-shaped ceramic catalyst body in which a base material is a high temperature-stable, high specific surface area porous cordierite body comprising a porous structure having a prescribed porosity and formed of a needle-shaped cordierite crystal phase, and further relates to methods of producing this needle-shaped ceramic body and needle-shaped ceramic catalyst body, and by using porous cordierite constituted of needle-shaped crystals as a catalyst-supporting honeycomb structure, the present invention is able to inhibit sintering-induced reduction in the specific surface area.Type: GrantFiled: December 13, 2004Date of Patent: December 21, 2010Assignees: National Institute of Advanced Industrial Science and Technology, Denso Corporation, Nippon Soken, Inc.Inventors: Jayaseelan Daniel Doni, Hideki Kita, Naoki Kondo, Shunkichi Ueno, Tatsuki Ohji, Shuzo Kanzaki, Kazuhiko Koike, Takumi Suzawa, Tomohiko Nakanishi
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Publication number: 20100315727Abstract: The present invention relates to an optical part holding member made of ceramic and a production method thereof, and provides an optical part holding member made of ceramic such that a sintered body after processes of degreasing and sintering has small dimensional changes over dimensions of a mold, and a production method thereof. An example includes a lens holder to hold an optical part, made of a silicon nitride ceramic base composite material produced through a process in which silicon and nitrogen are reacted to be nitrided and contains silicon carbide and an iron compound.Type: ApplicationFiled: May 13, 2010Publication date: December 16, 2010Applicants: FUJIFILM CORPORATION, National Institute of Advanced Industrial Science and Technology, FUJINON CORPORATIONInventors: Ikuo TAKI, Hideki HYUGA, Hideki KITA, Yasunori TANAKA
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Publication number: 20100315728Abstract: The present invention relates to an optical part holding member made of ceramic and a production method thereof, and provides an effective permeability to prevent dew condensation. The optical part holding member is made of a silicon nitride ceramic base composite material to hold an optical part, which is produced through a process of nitriding in which silicon is caused to react with nitrogen. By using the silicon nitride ceramic base composite material containing silicon carbide and an iron compound, an airflow volume of 50 ml or more per minute is achieved in an effective airflow area of 1.5 cm2 when an air pressure is added with a pressure difference of 0.4 MPa between both surfaces of a sample of the silicon nitride ceramic base composite material having 1 mm thickness, and the optical part holding member having effective permeability to prevent dew condensation is obtained.Type: ApplicationFiled: May 18, 2010Publication date: December 16, 2010Applicants: FUJIFILM Corporation, National Institute of Advanced Industrial Science and Technology, FUJINON CORPORATIONInventors: Ikuo TAKI, Hideki HYUGA, Hideki KITA, Yasunori TANAKA
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Patent number: 7838462Abstract: A needle-shaped ceramic body having as its base material a cordierite porous body having a high specific surface area and superior thermal shock resistance, and a needle-shaped catalyst-ceramic body are provided. The present invention relates to a needle-shaped ceramic body having as its base material a needle-shaped cordierite in which the tips thereof are rounded, a needle-shaped catalyst-ceramic body loaded with a catalyst, and a method of production of a ceramic body in which a portion of a raw material (fluoride) gasified by a reaction between raw materials is grown into a needle like shape on the metal catalyst (Fe), wherein the tips of needle-shaped particles are rounded, using a vapor-liquid-solid (VLS) reaction, in a raw material burning process.Type: GrantFiled: January 27, 2006Date of Patent: November 23, 2010Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Hideki Kita, Jayaseelan Daniel Doni, Naoki Kondo, Shunkichi Ueno, Kazuhiko Koike, Keiichi Yamada, Tomohiko Nakanishi
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Patent number: 7749931Abstract: A ceramic material for an optical member which shows black, wherein the ceramic material comprises a reaction-sintered sintered ceramic body prepared by synthesizing a formed body of a mixture comprising a ceramic raw material and a component that accelerates blackening, making use of a reaction sintering; and wherein the ceramic material is a porous body.Type: GrantFiled: February 13, 2007Date of Patent: July 6, 2010Assignees: FUJIFILM Corporation, Fujinon CorporationInventors: Hideki Hyuga, Hideki Kita, Tetsuya Yamazaki, Yasunori Tanaka
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Patent number: 7605110Abstract: A ceramic body, a ceramic catalyst body, a ceramic catalyst body and related manufacturing methods are disclosed wherein a cordierite porous base material has a surface, formed with acicular particles made of a component different from that of cordierite porous base material, which has an increased specific surface area with high resistance to a sintering effect. The ceramic body is manufactured by preparing a slurry containing an acicular particle source material, preparing a porous base material, applying the slurry onto a surface of the porous base material and firing the porous base material, whose surface is coated with the slurry, to cause acicular particles to develop on the surface of the porous base material. A part of or a whole of surfaces of the acicular particles is coated with a constituent element different from that of the acicular particles.Type: GrantFiled: April 5, 2007Date of Patent: October 20, 2009Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Keiichi Yamada, Kazuhiko Koike, Katsumi Yoshida, Hideki Kita, Naoki Kondo, Hideki Hyuga
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Publication number: 20070254804Abstract: The present invention provides a needle-shaped ceramic body and needle-shaped ceramic catalyst body in which a case material is a high specific surface area porous cordierite body that is stable at high temperatures, and also provides methods of producing this needle-shaped ceramic body and needle-shaped ceramic catalyst body. The present invention relates to a needle-shaped ceramic body and needle-shaped ceramic catalyst body in which a base material is a high temperature-stable, high specific surface area porous cordierite body comprising a porous structure having a prescribed porosity and formed of a needle-shaped cordierite crystal phase and further relates to methods of producing this needle-shaped ceramic body and needle-shaped ceramic catalyst body, and by using porous cordierite constituted of needle-shaped crystals as a catalyst-supporting honeycomb structure, the present invention is able to inhibit sintering-induced reduction in the specific surface area.Type: ApplicationFiled: December 13, 2004Publication date: November 1, 2007Applicants: National Instof Adv Industrial Science and Tech, Denso Corporation, Nippon Soken, IncInventors: Jayaseelan Daniel Doni, Hideki Kita, Naoki Kondo, Shunkichi Ueno, Tatsuki Ohji, Shuzo Kanzaki, Kazuhiko Koike, Takumi Suzawa, Tomohiko Nakanishi
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Publication number: 20070254808Abstract: A ceramic body, a ceramic catalyst body, a ceramic catalyst body and related manufacturing methods are disclosed wherein a cordierite porous base material has a surface, formed with acicular particles made of a component different from that of cordierite porous base material, which has an increased specific surface area with high resistance to a sintering effect. The ceramic body is manufactured by preparing a slurry containing an acicular particle source material, preparing a porous base material, applying the slurry onto a surface of the porous base material and firing the porous base material, whose surface is coated with the slurry, to cause acicular particles to develop on the surface of the porous base material. A part of or a whole of surfaces of the acicular particles is coated with a constituent element different from that of the acicular particles.Type: ApplicationFiled: April 5, 2007Publication date: November 1, 2007Applicants: DENSO CORPORATION, Nippon Soken, Inc.Inventors: Keiichi Yamada, Kazuhiko Koike, Katsumi Yoshida, Hideki Kita, Naoki Kondo, Hideki Hyuga
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Publication number: 20070191209Abstract: A ceramic material for an optical member which shows black, wherein the ceramic material comprises a reaction-sintered sintered ceramic body prepared by synthesizing a formed body of a mixture comprising a ceramic raw material and a component that accelerates blackening, making use of a reaction sintering; and wherein the ceramic material is a porous body.Type: ApplicationFiled: February 13, 2007Publication date: August 16, 2007Applicants: FUJIFILM Corporation, FUJINON CORPORATIONInventors: Hideki Hyuga, Hideki Kita, Tetsuya Yamazaki, Yasunori Tanaka
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Publication number: 20060178265Abstract: A needle-shaped ceramic body having as its base material a cordierite porous body having a high specific surface area and superior thermal shock resistance, and a needle-shaped catalyst-ceramic body are provided. The present invention relates to a needle-shaped ceramic body having as its base material a needle-shaped cordierite in which the tips thereof are rounded, a needle-shaped catalyst-ceramic body loaded with a catalyst, and a method of production of a ceramic body in which a portion of a raw material (fluoride) gasified by a reaction between raw materials is grown into a needle like shape on the metal catalyst (Fe), wherein the tips of needle-shaped particles are rounded, using a vapor-liquid-solid (VLS) reaction, in a raw material burning process.Type: ApplicationFiled: January 27, 2006Publication date: August 10, 2006Applicants: Nat Institute of Advanced Indust Science & Tech., DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Hideki Kita, Jayaseelan Doni, Naoki Kondoh, Shunkichi Ueno, Kazuhiko Koike, Keiichi Yamada, Tomohiko Nakanishi
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Patent number: 6632018Abstract: A thermocouple-type temperature-detecting device excellent in the temperature measurement responsiveness constituted of an outer protective pipe 1 and an inner protective pipe 2, the outer protective pipe 1 is formed in a laminated layer structure of a 2nd layer 10 made of a ceramic containing molten metal-repelling BN and a 1st layer 11 made of a ceramic, the inner protective pipe 2 is formed of a front protective pipe 3 made of a ceramic having a good heat conductivity and a heat-shielding rear protective pipe 4 extending into the outer protective pipe 1 through an air layer 17, furthermore, the head portion 5 of the front protective pipe 3 is projected from the outer protective pipe 1, and a temperature-sensitive portion 20 of a thermocouple is disposed in the inside of the head portion 5.Type: GrantFiled: March 7, 2001Date of Patent: October 14, 2003Assignee: Isuzu Motors Ltd.Inventors: Tetsuya Isshiki, Takayuki Suzuki, Hideki Kita