Patents by Inventor Ken Takata
Ken Takata 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: 11499202Abstract: A cooling method for a workpiece includes placing entirety of the workpiece in an inner space of a recess provided on a molding surface of a lower mold, pressing or restraining the workpiece by a mold including the lower mold and an upper mold in which a protrusion corresponding to the recess of the lower mold is provided on a molding surface, supplying a liquid coolant to the inner space of the recess through a coolant supply passage provided in at least one of the lower mold and the upper mold by a pump, and discharging air in the inner space of the recess upward through an air escape passage, and cooling the workpiece by immersing the entirety of the workpiece, which has been heated, in the liquid coolant that fills the recess.Type: GrantFiled: April 8, 2021Date of Patent: November 15, 2022Assignee: AISIN FUKUI CORPORATIONInventors: Akihiro Seki, Nobuyuki Naito, Yoichi Jinza, Hiroshi Fukuchi, Kazuo Hikida, Ken Takata, Naruhiko Nomura
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Patent number: 11104971Abstract: In a mold, at least one of a lower mold and an upper mold includes a coolant supply passage through which a liquid coolant is supplied to an inner space of a recess, and the mold includes an air escape passage through which air in the inner space of the recess is discharged upward.Type: GrantFiled: April 18, 2017Date of Patent: August 31, 2021Assignee: AISIN AW INDUSTRIES CO., LTD.Inventors: Akihiro Seki, Nobuyuki Naito, Yoichi Jinza, Hiroshi Fukuchi, Kazuo Hikida, Ken Takata, Naruhiko Nomura
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Publication number: 20210222264Abstract: A cooling method for a workpiece includes placing entirety of the workpiece in an inner space of a recess provided on a molding surface of a lower mold, pressing or restraining the workpiece by a mold including the lower mold and an upper mold in which a protrusion corresponding to the recess of the lower mold is provided on a molding surface, supplying a liquid coolant to the inner space of the recess through a coolant supply passage provided in at least one of the lower mold and the upper mold by a pump, and discharging air in the inner space of the recess upward through an air escape passage, and cooling the workpiece by immersing the entirety of the workpiece, which has been heated, in the liquid coolant that fills the recess.Type: ApplicationFiled: April 8, 2021Publication date: July 22, 2021Applicant: AISIN AW INDUSTRIES CO., LTD.Inventors: Akihiro SEKI, Nobuyuki NAITO, Yoichi JINZA, Hiroshi FUKUCHI, Kazuo HIKIDA, Ken TAKATA, Naruhiko NOMURA
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Patent number: 10837077Abstract: The present invention provides steel sheet excellent in cold formability and ductility after heat treatment and a method for production thereof. The steel sheet of the present invention is steel sheet which has a chemical composition containing, by mass %, C: 0.10 to 0.40%, Si: 0.30 to 1.00%, Mn: 0.30 to 1.00%, Al: 0.001 to 0.10%, P: 0.0001 to 0.02%, and S: 0.0001 to 0.01% and having a balance of Fe and impurities, which steel sheet characterized in that a ratio (B/A) of the number of carbides at the ferrite grain boundaries (B) to the number of carbides inside the ferrite grains (A) is over 1, a ferrite grain size is 5 ?m to 50 ?m, an average grain size of carbides is 0.4 ?m to 2.0 ?m, a pearlite area ratio is 6% or less, and a Vicker's hardness is 120 HV to 170 HV.Type: GrantFiled: May 26, 2016Date of Patent: November 17, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Kazuo Hikida, Ken Takata, Kengo Takeda, Motonori Hashimoto
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Publication number: 20190100816Abstract: In a mold, at least one of a lower mold and an upper mold includes a coolant supply passage through which a liquid coolant is supplied to an inner space of a recess, and the mold includes an air escape passage through which air in the inner space of the recess is discharged upward.Type: ApplicationFiled: April 18, 2017Publication date: April 4, 2019Applicant: AISIN AW INDUSTRIES CO., LTD.Inventors: Akihiro SEKI, Nobuyuki NAITO, Yoichi JINZA, Hiroshi FUKUCHI, Kazuo HIKIDA, Ken TAKATA, Naruhiko NOMURA
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Publication number: 20180230582Abstract: Low carbon steel plate excellent impact resistance characteristics after carburizing and quenching and after tempering, characterized by having a predetermined chemical composition, an average grain size of carbides of 0.4 ?m to 2.0 ?m, an area ratio of pearlite of 6% or less, a ratio of a number of carbides at the ferrite grain boundaries to the number of carbides inside the ferrite grains of over 1, and a Vickers hardness of 100HV to 180HV.Type: ApplicationFiled: May 25, 2016Publication date: August 16, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kengo TAKEDA, Kazuo HIKIDA, Ken TAKATA, Motonori HASHIMOTO, Toshimasa TOMOKIYO, Yasushi TSUKANO, Takashi ARAMAKI
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Publication number: 20180171445Abstract: A steel plate improved in formability and wear resistance, having a predetermined chemical composition, having a metal structure of the steel plate having a ratio of number of carbides at ferrite grain boundaries with respect to a number of carbides in ferrite grains of over 1 and having a ferrite grain size of 5 ?m to 50 ?m, and having a Vickers hardness of steel plate of 100 HV to 170 HV.Type: ApplicationFiled: June 17, 2016Publication date: June 21, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kazuo HIKIDA, Motonori HASHIMOTO, Kengo TAKEDA, Ken TAKATA
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Publication number: 20180135146Abstract: A steel sheet improved in hardenability and material formability having a predetermined chemical composition, characterized in that, in the metal structure of the steel sheet, an average grain size of carbides is 0.4 ?m to 2.0 ?m, an area ratio of pearlite is 6% or less, when a number of carbides in ferrite grains is A and a number of carbides at ferrite grain boundaries is B, B/A>l, and when an X-ray diffraction intensity at {211}<011>at a plane of a part of ½ sheet thickness of the steel sheet is denoted by “I1” and an X-ray diffraction intensity at {100}<011>is denoted by “I0”, I1/I0<1 is satisfied, and the steel sheet has a Vickers hardness of 100 HV to 150 HV.Type: ApplicationFiled: May 26, 2016Publication date: May 17, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Ken TAKATA, Kazuo HIKIDA, Kengo TAKEDA, Motonori HASHIMOTO
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Publication number: 20180127848Abstract: The present invention provides steel sheet excellent in cold formability and ductility after heat treatment and a method for production thereof. The steel sheet of the present invention is steel sheet which has a chemical composition containing, by mass %, C: 0.10 to 0.40%, Si: 0.30 to 1.00%, Mn: 0.30 to 1.00%, Al: 0.001 to 0.10%, P: 0.0001 to 0.02%, and S: 0.0001 to 0.01% and having a balance of Fe and impurities, which steel sheet characterized in that a ratio (B/A) of the number of carbides at the ferrite grain boundaries (B) to the number of carbides inside the ferrite grains (A) is over 1, a ferrite grain size is 5 ?m to 50 ?m, an average grain size of carbides is 0.4 ?m to 2.0 ?m, a pearlite area ratio is 6% or less, and a Vicker's hardness is 120 HV to 170 HV.Type: ApplicationFiled: May 26, 2016Publication date: May 10, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kazuo HIKIDA, Ken TAKATA, Kengo TAKEDA, Motonori HASHIMOTO
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Publication number: 20180105891Abstract: The present invention provides a steel sheet having an excellent cold workability during forming and a method for producing the same. The steel sheet of the present invention is characterized in that: (a) the ratio of the number of carbides at the ferrite grain boundary to the number of carbides in the ferrite grain exceeds 1, (b) the ferrite grain diameter is 5 ?m or more and 50 ?m or less, (c) the in-plane anisotropy |?r| of the r value is 0.2 or less, (d) the Vickers hardness is 100 HV or more and 150 HV or less, (e) the random intensity ratio of the {311} <011> orientation at the ½-thickness portion of the steel sheet is 3.0 or less.Type: ApplicationFiled: April 8, 2016Publication date: April 19, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kazuo HIKIDA, Motonori HASHIMOTO, Kengo TAKEDA, Ken TAKATA
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Patent number: 8500926Abstract: An aluminum alloy material for high-temperature/high-speed molding containing 2.0 to 8.0 mass % of Mg, 0.05 to 1.0 mass % of Mn, 0.01 to 0.3 mass % of Zr, 0.06 to 0.4 mass % of Si and 0.06 to 0.4 mass % of Fe, with the balance being made of aluminum and inevitable impurities; an aluminum alloy material for high-temperature/high-speed molding containing 2.0 to 8.0% of Mg, 0.05 to 1.5% of Mn and 0.05 to 0.4% of Cr, Fe being restricted to 0.4% or less and Si being restricted to 0.4% or less, the grain diameter of a Cr-base intermetallic compound formed by melt-casting being 20 ?m or less, and grains of intermetallic compounds with a grain diameter in the range from 50 to 1,000 nm as Mn-base and Cr-base precipitates being present in a distribution density of 350,000 grains/mm2 or more, the aluminum alloy material being used for high-temperature/high-speed molding by subjecting the alloy material to cooling at a cooling rate of 20° C./min or more immediately after molding at a temperature range from 200 to 550° C.Type: GrantFiled: July 11, 2008Date of Patent: August 6, 2013Assignees: Furukawa-Sky Aluminum Corp, Nippon Steel & Sumitomo Metal CorporationInventors: Koji Ichitani, Tsutomu Tagata, Toshio Komatsubara, Ken Takata
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Publication number: 20080257462Abstract: An aluminum alloy material for high-temperature/high-speed molding containing 2.0 to 8.0 mass % of Mg, 0.05 to 1.0 mass % of Mn, 0.01 to 0.3 mass % of Zr, 0.06 to 0.4 mass % of Si and 0.06 to 0.4 mass % of Fe, with the balance being made of aluminum and inevitable impurities; an aluminum alloy material for high-temperature/high-speed molding containing 2.0 to 8.0% of Mg, 0.05 to 1.5% of Mn and 0.05 to 0.4% of Cr, Fe being restricted to 0.4% or less and Si being restricted to 0.4% or less, the grain diameter of a Cr-base intermetallic compound formed by melt-casting being 20 ?m or less, and grains of intermetallic compounds with a grain diameter in the range from 50 to 1,000 nm as Mn-base and Cr-base precipitates being present in a distribution density of 350,000 grains/mm2 or more, the aluminum alloy material being used for high-temperature/high-speed molding by subjecting the alloy material to cooling at a cooling rate of 20° C./min or more immediately after molding at a temperature range from 200 to 550° C.Type: ApplicationFiled: July 11, 2008Publication date: October 23, 2008Applicants: FURUKAWA-SKY ALUMINUM CORP., NIPPON STEEL CORPORATIONInventors: Koji ICHITANI, Tsutomu TAGATA, Toshio KOMATSUBARA, Ken TAKATA
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Patent number: 5685923Abstract: Disclosed is a ferritic stainless steel for forming into bellows having high resistance to stress corrosion cracking, comprising, in terms of wt %, not greater than 0.02% of C, from 0.1 to 1.5% of Si, not greater than 1.0% of Mn, from 11.0 to 22.0% of Cr, from 0.01 to 0.08% of Al, not greater than 0.015% of N, at least one of not greater than 0.6% of Ti and not greater than 1.0% of Nb, whenever necessary, and furthermore, at least one of not greater than 2% of Mn, not greater than 1.5% of Cu and not greater than 1.5% of Ni. This steel has the crystal grain size measured in a section in a direction orthogonal to a rolling direction is not greater than 8.5 in terms of the grain size number, and the crystal grain size measured in a section orthogonal to a section parallel to the rolling direction is not smaller than 5.0 on an average in terms of the grain size number.Type: GrantFiled: December 27, 1995Date of Patent: November 11, 1997Assignee: Nippon Steel CorporationInventors: Ken Takata, Akio Yamamoto