Patents by Inventor Yoshifumi Nagasaki
Yoshifumi Nagasaki 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: 10526715Abstract: A rare earth permanent magnet is prepared by immersing a portion of a sintered magnet body of R1—Fe—B composition (wherein R1 is a rare earth element) in an electrodepositing bath of a powder dispersed in a solvent, the powder comprising an oxide, fluoride, oxyfluoride, hydride or rare earth alloy of a rare earth element, effecting electrodeposition for letting the powder deposit on a region of the surface of the magnet body, and heat treating the magnet body with the powder deposited thereon at a temperature below the sintering temperature in vacuum or in an inert gas.Type: GrantFiled: October 13, 2017Date of Patent: January 7, 2020Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yukihiro Kuribayashi, Yoshifumi Nagasaki
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Patent number: 10181377Abstract: A production method for a rare earth permanent magnet, wherein: a sintered magnet body comprising an R1—Fe—B composition (R1 represents one or more elements selected from among rare earth elements, including Y and Sc) is immersed in an electrodeposition liquid obtained by dispersing a powder containing an R2 oxyfluoride and/or an R3 hydride (R2 and R3 represent one or more elements selected from among rare earth elements, including Y and Sc) in a solvent; an electrodeposition process is used to coat the powder onto the surface of the sintered magnet body; and, in the state in which the powder is present on the surface of the magnet body, the magnet body and the powder are subjected to a heat treatment in a vacuum or an inert gas at a temperature equal to or less than the sintering temperature of the magnet.Type: GrantFiled: August 30, 2013Date of Patent: January 15, 2019Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yoshifumi Nagasaki, Masanobu Shimao
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Patent number: 10179955Abstract: A production method for a rare earth permanent magnet, wherein: a sintered magnet body comprising an R1—Fe—B composition (R1 represents one or more elements selected from among rare earth elements, including Y and Sc) is immersed in an electrodeposition liquid comprising a slurry obtained by dispersing a powder containing an R2 fluoride (R2 represents one or more elements selected from among rare earth elements, including Y and Sc) in water; an electrodeposition process is used to coat the powder onto the surface of the sintered magnet body; and, in the state in which the powder is present on the surface of the magnet body, the magnet body and the powder are subjected to a heat treatment in a vacuum or an inert gas at a temperature equal to or less than the sintering temperature of the magnet.Type: GrantFiled: August 30, 2013Date of Patent: January 15, 2019Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yoshifumi Nagasaki, Masanobu Shimao
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Patent number: 10138564Abstract: A production method for a rare earth permanent magnet, wherein: a sintered magnet body comprising an R1—Fe—B composition (R1 represents one or more elements selected from rare earth elements including Y and Sc) is immersed in an electrodeposition liquid obtained by dispersing a powder containing an R2 oxide (R2 represents one or more elements selected from rare earth elements including Y and Sc) in a solvent; an electrodeposition process is used to coat the powder to the surface of the sintered magnet body; and, in the state in which the powder is present on the surface of the magnet body, the magnet body and the powder are subjected to heat treatment in a vacuum or an inert gas at a temperature equal to or less than the sintering temperature of the magnet.Type: GrantFiled: August 30, 2013Date of Patent: November 27, 2018Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yoshifumi Nagasaki, Masanobu Shimao
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Patent number: 10017871Abstract: An electrodepositing apparatus is provided comprising an inner tank (1) filled with an electrodepositing solution, an outer tank (3), a feedback means (4), a rectifying member (5) disposed in the inner tank (1), a means (8) for holding an article (p), a counter electrode (6), and a power supply (9). The electrodepositing solution is circulated in such a way that it overflows the inner tank and is fed back from the outer tank to the inner tank by the feedback means, the flow of the solution is rectified by the rectifying member to keep flat the solution surface in the inner tank, a selected portion of the article is immersed in the solution, and the coating agent is electrodeposited on the selected portion of the article.Type: GrantFiled: February 18, 2015Date of Patent: July 10, 2018Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yukihiro Kuribayashi, Yoshifumi Nagasaki
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Publication number: 20180044810Abstract: A rare earth permanent magnet is prepared by immersing a portion of a sintered magnet body of R1—Fe—B composition (wherein R1 is a rare earth element) in an electrodepositing bath of a powder dispersed in a solvent, the powder comprising an oxide, fluoride, oxyfluoride, hydride or rare earth alloy of a rare earth element, effecting electrodeposition for letting the powder deposit on a region of the surface of the magnet body, and heat treating the magnet body with the powder deposited thereon at a temperature below the sintering temperature in vacuum or in an inert gas.Type: ApplicationFiled: October 13, 2017Publication date: February 15, 2018Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Yukihiro Kuribayashi, Yoshifumi Nagasaki
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Patent number: 9845545Abstract: A rare earth permanent magnet is prepared by immersing a portion of a sintered magnet body of R1—Fe—B composition (wherein R1 is a rare earth element) in an electrodepositing bath of a powder dispersed in a solvent, the powder comprising an oxide, fluoride, oxyfluoride, hydride or rare earth alloy of a rare earth element, effecting electrodeposition for letting the powder deposit on a region of the surface of the magnet body, and heat treating the magnet body with the powder deposited thereon at a temperature below the sintering temperature in vacuum or in an inert gas.Type: GrantFiled: February 18, 2015Date of Patent: December 19, 2017Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yukihiro Kuribayashi, Yoshifumi Nagasaki
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Patent number: 9517547Abstract: The disclosed cemented carbide base outer blade cutting wheel comprises a base in the form of an annular thin disc of cemented carbide, and a blade section on the outer periphery of the base. The blade section contains: diamond and/or CBN abrasive grains pre-coated with a magnetic material; a metal or alloy bond formed by electroplating or electroless plating for bonding abrasive grains together and to the base; and a metal or alloy binder having a melting point of up to 350° C. infiltrated between abrasive grains and between abrasive grains and the base. The method for manufacturing said outer blade cutting wheel is also disclosed.Type: GrantFiled: November 28, 2011Date of Patent: December 13, 2016Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Masaki Kasashima, Takehisa Minowa, Harukazu Maegawa, Yoshifumi Nagasaki
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Publication number: 20150233006Abstract: A rare earth permanent magnet is prepared by immersing a portion of a sintered magnet body of R1—Fe—B composition (wherein R1 is a rare earth element) in an electrodepositing bath of a powder dispersed in a solvent, the powder comprising an oxide, fluoride, oxyfluoride, hydride or rare earth alloy of a rare earth element, effecting electrodeposition for letting the powder deposit on a region of the surface of the magnet body, and heat treating the magnet body with the powder deposited thereon at a temperature below the sintering temperature in vacuum or in an inert gas.Type: ApplicationFiled: February 18, 2015Publication date: August 20, 2015Applicant: SHIN-ETSU CHEMICAL CO., LTDInventors: Yukihiro Kuribayashi, Yoshifumi Nagasaki
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Publication number: 20150233007Abstract: An electrodepositing apparatus is provided comprising an inner tank (1) filled with an electrodepositing solution, an outer tank (3), a feedback means (4), a rectifying member (5) disposed in the inner tank (1), a means (8) for holding an article (p), a counter electrode (6), and a power supply (9). The electrodepositing solution is circulated in such a way that it overflows the inner tank and is fed back from the outer tank to the inner tank by the feedback means, the flow of the solution is rectified by the rectifying member to keep flat the solution surface in the inner tank, a selected portion of the article is immersed in the solution, and the coating agent is electrodeposited on the selected portion of the article.Type: ApplicationFiled: February 18, 2015Publication date: August 20, 2015Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yukihiro Kuribayashi, Yoshifumi Nagasaki
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Publication number: 20150211139Abstract: A production method for a rare earth permanent magnet, wherein: a sintered magnet body comprising an R1—Fe—B composition (R1 represents one or more elements selected from among rare earth elements, including Y and Sc) is immersed in an electrodeposition liquid comprising a slurry obtained by dispersing a powder containing an R2 fluoride (R2 represents one or more elements selected from among rare earth elements, including Y and Sc) in water; an electrodeposition process is used to coat the powder onto the surface of the sintered magnet body; and, in the state in which the powder is present on the surface of the magnet body, the magnet body and the powder are subjected to a heat treatment in a vacuum or an inert gas at a temperature equal to or less than the sintering temperature of the magnet.Type: ApplicationFiled: August 30, 2013Publication date: July 30, 2015Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yoshifumi Nagasaki, Masanobu Shimao
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Publication number: 20150211138Abstract: A production method for a rare earth permanent magnet, wherein: a sintered magnet body comprising an R1—Fe—B composition (R1 represents one or more elements selected from rare earth elements including Y and Sc) is immersed in an electrodeposition liquid obtained by dispersing a powder containing an R2 oxide (R2 represents one or more elements selected from rare earth elements including Y and Sc) in a solvent; an electrodeposition process is used to coat the powder to the surface of the sintered magnet body; and, in the state in which the powder is present on the surface of the magnet body, the magnet body and the powder are subjected to heat treatment in a vacuum or an inert gas at a temperature equal to or less than the sintering temperature of the magnet.Type: ApplicationFiled: August 30, 2013Publication date: July 30, 2015Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshifumi Nagasaki, Masanobu Shimao
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Publication number: 20150206653Abstract: A production method for a rare earth permanent magnet, wherein: a sintered magnet body comprising an R1—Fe—B composition (R1 represents one or more elements selected from among rare earth elements, including Y and Sc) is immersed in an electrodeposition liquid obtained by dispersing a powder containing an R2 oxyfluoride and/or an R3 hydride (R2 and R3 represent one or more elements selected from among rare earth elements, including Y and Sc) in a solvent; an electrodeposition process is used to coat the powder onto the surface of the sintered magnet body; and, in the state in which the powder is present on the surface of the magnet body, the magnet body and the powder are subjected to a heat treatment in a vacuum or an inert gas at a temperature equal to or less than the sintering temperature of the magnet.Type: ApplicationFiled: August 30, 2013Publication date: July 23, 2015Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yoshifumi Nagasaki, Masanobu Shimao
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Patent number: 9016269Abstract: An outer blade cutting wheel comprising an annular thin disc base of cemented carbide and a blade section of metal or alloy-bonded abrasive grains on the outer periphery of the base is provided. The abrasive grains are diamond and/or cBN grains having an average grain size of 45-310 ?m and a TI of at least 150. The blade section includes overlays having a thickness tolerance (T3max?T3min) of 0.001 mm to 0.1×T2 mm. The blade section has a roundness (ODmax/2?ODmin/2) of 0.001 mm to 0.01×ODmax mm.Type: GrantFiled: July 3, 2012Date of Patent: April 28, 2015Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masaki Kasashima, Takehisa Minowa, Harukazu Maegawa, Yoshifumi Nagasaki
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Publication number: 20130252522Abstract: The disclosed cemented carbide base outer blade cutting wheel comprises a base in the form of an annular thin disc of cemented carbide, and a blade section on the outer periphery of the base. The blade section contains: diamond and/or CBN abrasive grains pre-coated with a magnetic material; a metal or alloy bond formed by electroplating or electroless plating for bonding abrasive grains together and to the base; and a metal or alloy binder having a melting point of up to 350° C. infiltrated between abrasive grains and between abrasive grains and the base. The method for manufacturing said outer blade cutting wheel is also disclosed.Type: ApplicationFiled: November 28, 2011Publication date: September 26, 2013Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Masaki Kasashima, Takehisa Minowa, Harukazu Maegawa, Yoshifumi Nagasaki
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Publication number: 20130252521Abstract: The disclosed cemented carbide base outer blade cutting wheel comprises a base in the form of an annular thin disc of cemented carbide, and a blade section on the outer periphery of the base. The blade section contains: diamond and/or CBN abrasive grains pre-coated with a magnetic material; a metal or alloy bond formed by electroplating or electroless plating for bonding abrasive grains together and to the base; a resin infiltrated between abrasive grains and between abrasive grains and the base, said resin being a thermoplastic resin having a melting point of up to 350° C. or a thermoset resin obtained by curing a liquid thermosetting resin composition having a curing temperature of up to 350° C. The method for manufacturing said outer blade cutting wheel is also disclosed.Type: ApplicationFiled: November 28, 2011Publication date: September 26, 2013Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Masaki Kasashima, Takehisa Minowa, Harukazu Maegawa, Yoshifumi Nagasaki
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Publication number: 20130008422Abstract: An outer blade cutting wheel comprising an annular thin disc base of cemented carbide and a blade section of metal or alloy-bonded abrasive grains on the outer periphery of the base is provided. The abrasive grains are diamond and/or cBN grains having an average grain size of 45-310 ?m and a TI of at least 150. The blade section includes overlays having a thickness tolerance (T3max?T3min) of 0.001 mm to 0.1×T2 mm. The blade section has a roundness (ODmax/2?ODmin/2) of 0.001 mm to 0.01×ODmax mm.Type: ApplicationFiled: July 3, 2012Publication date: January 10, 2013Applicant: SHIN-ETSU CHEMICAL CO., LTDInventors: Masaki Kasashima, Takehisa Minowa, Harukazu Maegawa, Yoshifumi Nagasaki