Patents by Inventor Toshio Murakami
Toshio Murakami 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: 20190153575Abstract: Provided is an ultra-high-strength steel sheet having a component composition that includes specific amounts of each of C, Mn, and Al and a remainder of iron and unavoidable impurities, and in which the amounts of each of P, S, and N among the unavoidable impurities are limited to a specific amount. The ultra-high-strength steel sheet includes 2 area % or more of a region having a structure that includes 90% or more of martensite and 0.5% or more of residual austentite by area ratio relative to the entire structure, the local Mn concentration in said region being at least 1.1 times that of the Mn content of the entire steel sheet. The ultra-high-strength steel sheet has a tensile strength of 1470 MPa or more.Type: ApplicationFiled: February 8, 2016Publication date: May 23, 2019Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Kosuke SHIBATA, Toshiya NAKATA, Toshio MURAKAMI, Takahiro OZAWA, Fumio YUSE, Atsuhiro SHIRAKI, Kenji SAITO, Yukihiro UTSUMI
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Publication number: 20190085426Abstract: One aspect of the present invention is a high strength steel sheet having a specific component composition, wherein a metal structure of the steel sheet comprises polygonal ferrite, bainite, tempered martensite, and retained austenite; when the metal structure is observed with a scanning electron microscope, the metal structure satisfies polygonal ferrite: 10 to 50 area %, bainite: 10 to 50 area %, and tempered martensite: 10 to 80 area % with respect to the metal structure overall; and when the metal structure is measured by X-ray diffractometry, the metal structure satisfies retained austenite: 5.0 volume % or more, retained austenite with a carbon concentration of 1.0 mass % or less: 3.5 volume % or more, and retained austenite with a carbon concentration of 0.8 mass % or less: 2.4 volume % or less with respect to the metal structure overall.Type: ApplicationFiled: February 8, 2017Publication date: March 21, 2019Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Muneaki IKEDA, Koji KASUYA, Tadao MURATA, Kenji SAITO, Toshio MURAKAMI, Yuichi FUTAMURA
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Publication number: 20190071757Abstract: A high-strength steel sheet comprising, as component composition, by mass: C: 0.15 to 0.35%; total of Si and Al: 0.5 to 2.5%; Mn: 1.0 to 4.0%; P: more than 0% and 0.05% or less; and S: more than 0% and 0.01% or less, with the balance being Fe and inevitable impurities, wherein a steel structure satisfies, in ratio with respect to the whole structure: ferrite: more than 5 area % and 50 area % or less; total of tempered martensite and bainite: 30 area % or more; and retained austenite: 10 volume % or more, the steel structure further includes MA, and the steel structure satisfies: an average circle equivalent diameter of the MA: 1.0 ?m or less; an average circle equivalent diameter of the retained austenite: 1.0 ?m or less; and a volume ratio of retained austenite with a circle equivalent diameter of 1.5 ?m or more to the whole retained austenite: 5% or more.Type: ApplicationFiled: February 22, 2017Publication date: March 7, 2019Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Tadao MURATA, Toshio MURAKAMI, Elijah KAKIUCHI, Shigeo OTANI, Yuichi FUTAMURA
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Publication number: 20190032166Abstract: An ultra-high-strength steel sheet having a component composition that includes specific amounts of each of C, Si, Mn, and Al and a remainder of iron and unavoidable impurities, and in which the amounts of each of P, S, and N among the unavoidable impurities are limited to a specific amount. The ultra-high-strength steel sheet includes 1 area % or more of a region in which martensite constitutes 90 area % or more, residual austentite constitutes 0.5 area % or more, and the local Mn concentration is at least 1.2 times that of the Mn content of the entire steel sheet. The ultra-high-strength steel sheet has a tensile strength of 1470 MPa or more, a yield ratio of 0.75 or more, and a total elongation of 10% or more.Type: ApplicationFiled: February 8, 2016Publication date: January 31, 2019Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Kosuke SHIBATA, Toshiya NAKATA, Toshio MURAKAMI, Takahiro OZAWA, Fumio YUSE, Atsuhiro SHIRAKI, Kenji SAITO, Yukihiro UTSUMI
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Publication number: 20190010587Abstract: A steel sheet for hot pressing includes in a chemical composition, in percent by mass, C of 0.1% to 0.4%, Si of greater than 0% to 2.0%, Mn of 0.5% to 3.0%, P of greater than 0% to 0.015%, S of greater than 0% to 0.01%, F3 of 0.0003% to 0.01%, N of greater than 0% to 0.05%, Al in a content of 2×[N]% to 0.3% at a Si content of greater than 0.5% to 2.0%; or Al in a content of (0.20+2×[N]-0.40×[Si]N)% to 0.3% at a Si content of 0% to 0.5%, where [N] and [Si] are contents of N and Si, respectively, in mass percent, with the remainder being iron and inevitable impurities, where contents of Ti, Zr, Hf, and Ta, of the inevitable impurities, are each controlled to 0.005% or lower. The steel sheet includes nitride-based inclusions with an equivalent circle diameter of 1 ?m or more in a number density of 0.10 per square millimeter.Type: ApplicationFiled: December 10, 2015Publication date: January 10, 2019Inventors: Toshio Murakami, Junya Naitou, Keisuke Okita, Shushi Ikeda, Shinji Sato, Andreas Pichler, Thomas Kurz
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Patent number: 10145488Abstract: A solenoid valve includes a sleeve, a spool valve, and a solenoid part. The solenoid part has an electromagnetic coil, a solenoid core, a plunger that moves in the axial direction with respect to the solenoid core, and a stopper that is interposed between the plunger and the solenoid core to restrict movement of the plunger. The solenoid core includes a cylindrical part and an extended part. The cylindrical part has an opposing surface facing the plunger in the axial direction and a contact surface that is contacted by the stopper. The extended part is extended in the axial direction from an outer peripheral end of the cylindrical part. At least a part of the opposing surface of the cylindrical part is located closer to the plunger than the contact surface.Type: GrantFiled: October 12, 2016Date of Patent: December 4, 2018Assignee: JTEKT CORPORATIONInventors: Kaori Fujita, Toshio Murakami
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Publication number: 20180312947Abstract: A steel sheet for hot pressing use according to the present invention has a specified chemical component composition, wherein some of Ti-containing precipitates contained in the steel sheet, each of which having an equivalent circle diameter of 30 nm or less, have an average equivalent circle diameter of 3 nm or more, the precipitated Ti amount and the total Ti amount in the steel fulfill the relationship represented by formula (1) shown below, and the sum total of the fraction of bainite and the fraction of martensite in the metal microstructure is 80 area % or more. Precipitated Ti amount (mass %)?3.4[N]>0.5×[total Ti amount (mass %)?3.4[N]]??(1) (In the formula (1), [N] represents the content (mass %) of N in the steel.Type: ApplicationFiled: July 5, 2018Publication date: November 1, 2018Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Toshio MURAKAMI, Junya Naitou, Keisuke Okita, Shushi Ikeda
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Patent number: 10040144Abstract: A spot welding method joins metal sheets by: clamping a stacked section of two or more stacked metal sheets with a pair of electrodes at a load of 100 N or more; applying pressure around the electrodes at a load, which is 5-1000% of the load due to the pair of electrodes, using a pressurizing member, which applies pressure on the stacked section in regions that are 20% or more of the total outer circumference of the electrode tips and for which the continuous regions of the entire outer circumference of the electrode tips that are not pressed are 30% or less (including 0%) of the entire outer circumference of the electrode tips; and passing welding current from the electrodes to the stacked section.Type: GrantFiled: June 24, 2013Date of Patent: August 7, 2018Assignee: Kobe Steel, Ltd.Inventor: Toshio Murakami
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Patent number: 10023934Abstract: The present disclosure relates to a high-strength hot-dip galvannealed steel sheet excellent in bake hardenability and bendability and having a component composition containing, in mass %, C: from 0.05 to 0.30%, Si: from 0.5 to 3.0%, Mn: from 0.2 to 3.0%, P: from 0 to 0.10%, S: from 0 to 0.010%, N: form 0 to 0.010%, and Al: from 0.001 to 0.10%, with the remainder being iron and unavoidable impurities. The steel sheet has a steel structure containing, in terms of area percentage, martensite: form 50 to 85% and ferrite: 0% or more and less than 5%, with the remainder being bainite. The steel sheet has a dislocation density of 5.0×1015 m?2 or more, a solute carbon amount of 0.08 mass % or more and a tensile strength of 1180 MPa or more.Type: GrantFiled: March 4, 2015Date of Patent: July 17, 2018Assignee: Kobe Steel, Ltd.Inventors: Kosuke Shibata, Toshio Murakami, Muneaki Ikeda, Michiharu Nakaya
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Publication number: 20180161421Abstract: Provided are a highly-safe recombinant vaccinia virus that is effective in preventing the onset of symptoms due to infection by novel influenza viruses, and a vaccine for the novel influenza viruses containing the recombinant vaccinia virus. This recombinant vaccinia virus is capable of expressing the hemagglutinin protein genes of the novel influenza virus. This novel influenza vaccine contains the recombinant vaccinia virus.Type: ApplicationFiled: January 29, 2018Publication date: June 14, 2018Inventors: Michinori KOHARA, Fumihiko YASUI, Toshio MURAKAMI, Hiroshi KIDA, Yoshihiro SAKODA
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Patent number: 9938597Abstract: In the present invention, a press-formed product is manufactured by heating a steel sheet for hot pressing use to a temperature of 900° C. or above and 1,100° C. or below, the steel sheet for hot pressing use having a predetermined chemical component composition, some of Ti-containing precipitates contained in the steel sheet, each of which having an equivalent circle diameter of 30 nm or less, having an average equivalent circle diameter of 6 nm or less, and the precipitated Ti amount and the total Ti amount in the steel fulfilling the relationship represented by formula (1) shown below, thereafter starting press-forming, and holding at the bottom dead point and cooling to a temperature lower than the martensite transformation starting temperature Ms while securing the average cooling rate of 20° C./s or more within a tool. Precipitated Ti amount(mass %)?3.4[N]<0.5×[total Ti amount (mass %)?3.4[N]]??(1) (In the formula (1), [N] represents the content (mass %) of N in the steel.).Type: GrantFiled: February 28, 2013Date of Patent: April 10, 2018Assignee: Kobe Steel, Ltd.Inventors: Toshio Murakami, Hideo Hata, Junya Naitou, Keisuke Okita, Shushi Ikeda
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Patent number: 9903498Abstract: A solenoid valve has a coil spring that biases a spool valve toward a solenoid portion, and an adjuster screw that is positioned to interpose the coil spring between the adjuster screw and the spool valve and that is screwed in an internally threaded portion of a sleeve so that its axial position is adjusted. The sleeve is swaged with a swaging tool etc. from an outer peripheral surface located on the outer peripheral side of the internally threaded portion of the sleeve, whereby the swaged part of the internally threaded portion is plastically deformed to the opposite side from the coil spring. The adjuster screw is thus fixed.Type: GrantFiled: February 24, 2015Date of Patent: February 27, 2018Assignee: JTEKT CORPORATIONInventors: Koichi Takanishi, Toshio Murakami, Kaori Fujita, Itsuki Ono
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Patent number: 9890437Abstract: This high-strength steel sheet contains, in mass %, 0.05 to 0.3% of C, 1 to 3% of Si, 0.5 to 3% of Mn, up to 0.1% (inclusive of 0%) of P, up to 0.01% (inclusive of 0%) of S, 0.001 to 0.1% of Al and 0.002 to 0.03% of N with the balance consisting of iron and unavoidable impurities, and has a microstructure which comprises, in area fraction relative to the microstructure, 40 to 85% of bainitic ferrite, 5 to 20% of retained austenite (?R), 10 to 50% (in total) of martensite and ?R, and 5 to 40% of ferrite. The retained austenite (?R) has a C concentration of 0.5 to 1.0 mass %, while the quantity of ?R present in the ferrite grains is 1% or more (in area fraction) relative to the microstructure.Type: GrantFiled: February 6, 2013Date of Patent: February 13, 2018Assignee: Kobe Steel, Ltd.Inventors: Elijah Kakiuchi, Toshio Murakami, Katsura Kajihara, Tatsuya Asai, Naoki Mizuta, Hideo Hata
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Patent number: 9863028Abstract: A hot-dip galvanized steel sheet contains specific amounts of C, Si, Mn, P, S, Ti, Al, and N with the remainder being iron and unavoidable impurities. Bainitic ferrite, martensite, retained ?, and ferrite (?) are present each in a specific area ratio. The remainder ? has a specific C concentration. Sub-grains in the recrystallized ? and un-recrystallized ? have a specific grain diameter. The surface area ratio of ? and worked ? having a grain diameter of 5 ?m or more is 5% or less. The average particle diameter of TiC particles inside ? grains is 10 nm or less.Type: GrantFiled: June 26, 2013Date of Patent: January 9, 2018Assignee: Kobe Steel, Ltd.Inventors: Elijah Kakiuchi, Toshio Murakami, Katsura Kajihara, Tatsuya Asai, Naoki Mizuta
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Patent number: 9850554Abstract: A hot-press formed product can be achieved which has regions corresponding to a shock resistant portion and an energy absorption portion within a single formed product without applying a welding method and achieves the balance of high strength and elongation with a high level according to each region by means of having a first forming region exhibiting a metal structure containing martensite: 80-97 area % and retained austenite: 3-20 area % respectively, the remaining structure being 5 area % or less, and a second forming region exhibiting a metal structure containing annealed martensite or annealed bainite: 30-97 area %, martensite as quenched: 0-67 area %, and retained austenite: 3-20 area %.Type: GrantFiled: March 15, 2013Date of Patent: December 26, 2017Assignee: Kobe Steel, Ltd.Inventors: Junya Naitou, Toshio Murakami, Shushi Ikeda, Keisuke Okita
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Publication number: 20170335423Abstract: In the present invention, a steel plate contains specific alloy components, has a steel structure that contains specific proportions of retained austenite and ferrite, with the remainder comprising one or more types selected from among bainite, martensite, tempered bainite and tempered martensite, and has a specific average carbon concentration and carbon concentration distribution in the retained austenite.Type: ApplicationFiled: November 20, 2015Publication date: November 23, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Toshio MURAKAMI, Shigeo OTANI
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Publication number: 20170268077Abstract: A high-strength high-ductility steel sheet has a specific component composition and a steel microstructure containing, in terms of an area ratio relative to the entire microstructure, 8% or more of a retained austenite, with the remainder being at least one of bainite, martensite, tempered bainite, and tempered martensite. With respect to the carbon concentration in the retained austenite, an average carbon concentration is from 0.9 to 1.2 mass %, a standard deviation of the carbon concentration distribution is 0.35 mass % or more, and an area ratio of a region having the carbon concentration of 1.5 mass % or more, relative to the entire microstructure, is 1.0% or more.Type: ApplicationFiled: November 25, 2015Publication date: September 21, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Toshio MURAKAMI, Shigeo OTANI
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Patent number: 9739394Abstract: A solenoid valve is provided which can be reduced in size while allowing a plunger and a shaft to slide smoothly. A solenoid valve includes a solenoid portion with a plunger that moves in an axial direction using a magnetic force generated by a solenoid coil. The solenoid portion has a cover member that houses the plunger, a shaft that is movable in the axial direction along with the plunger, and a core member that attracts the plunger in the axial direction. The shaft is supported by a first bearing portion formed on a cylindrical portion of the core member and a second bearing portion formed on a second bottom portion of the cover member such that the shaft is movable in the axial direction.Type: GrantFiled: November 19, 2015Date of Patent: August 22, 2017Assignee: JTEKT CORPORATIONInventors: Kaori Fujita, Toshio Murakami, Itsuki Ono
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Patent number: 9708697Abstract: In a steel sheet having a specific chemical composition and having a microstructure including ferrite that is a soft first phase by 20-50% in terms of the area ratio, the remainder being tempered martensite and/or tempered bainite that is a hard second phase, the microstructure of steel of a surface layer section of the steel sheet from the surface to the depth of 100 ?m and a center section of t/4-3t/4 (t is the sheet thickness) is controlled.Type: GrantFiled: May 29, 2013Date of Patent: July 18, 2017Assignee: Kobe Steel, Ltd.Inventors: Tomokazu Masuda, Katsura Kajihara, Toshio Murakami, Masaaki Miura, Muneaki Ikeda
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Patent number: 9689060Abstract: This high-strength hot-rolled steel plate contains specific amounts of C, Si, Mn, Al, V and also Ti and/or Nb so as to fulfill C?12(V/51+Ti/48+Nb/93)>0.03, and the rest consists of iron and unavoidable impurities. Ferrite is the main microstructure, the remaining microstructure is one or more selected from the group consisting of bainite, martensite and retained austenite, wherein the average particle diameter of precipitated carbides (the total content of V, Ti and Nb is 0.02% or greater) in the ferrite is less than 6 nm.Type: GrantFiled: August 15, 2012Date of Patent: June 27, 2017Assignee: Kobe Steel, Ltd.Inventors: Toshio Murakami, Masao Kinefuchi, Hideo Hata