Patents by Inventor Akihiro Makino
Akihiro Makino 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: 20240120783Abstract: A water-cooled motor includes: an annular stator having a central axis; and an annular housing surrounding the stator around the central axis and provided with a cooling channel within the housing, the housing includes: an annular non-magnetic metal pipe; and a casting member cast to envelop the metal pipe around the central axis, and the metal pipe is located inward of the cooling channel and located outward of an outer surface of the stator, in a radial direction of the stator.Type: ApplicationFiled: October 3, 2023Publication date: April 11, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Iori MATSUDA, Tomokazu SUDA, Yuta ABIKO, Akihiro MAKINO, Shotaro OKAMOTO, Daisuke MATSUDA
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Patent number: 11851738Abstract: A soft magnetic powder according to the present disclosure comprises a particle which comprises a plurality of nanosized crystallites and an amorphous phase existing around the crystallites, wherein the crystallites have an average grain diameter of 30 nm or less, and the amorphous phase has an average thickness of 30 nm or less; and wherein when a minor axis of a cross section of the particle is determined as r, an average Fe concentration in the amorphous phase is lower than an average Fe concentration in the crystallites in a region where a depth from a surface of the particle is 0.2 r or more and 0.4 r or less.Type: GrantFiled: January 26, 2018Date of Patent: December 26, 2023Assignees: Murata Manufacturing Co., Ltd., ALPS ALPINE CO., LTD.Inventors: Kazuhiro Henmi, Toru Takahashi, Noriharu Yodoshi, Akihiro Makino
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Patent number: 11817245Abstract: A soft magnetic powder according to the present disclosure comprises a particle having no hollow part as a main component, wherein a number of hollow particle present in a region of 2.5 mm square is 40 or less in a cross section of a molded body obtained by powder-compacting and molding the soft magnetic powder so as to have a volume filling rate of 75% or more and 77% or less (i.e., from 75% to 77%).Type: GrantFiled: January 29, 2018Date of Patent: November 14, 2023Assignee: Murata Manufacturing Co., Ltd.Inventors: Toru Takahashi, Kazuhiro Henmi, Noriharu Yodoshi, Akihiro Makino
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Patent number: 11773959Abstract: A driving force transmitting device includes a case, an electric motor, and a gearbox. The electric motor includes an output shaft. The gearbox includes a spur gear that rotates coaxially with the output shaft. The case includes a partition wall, a first accommodating chamber accommodating the electric motor, and a second accommodating chamber that accommodates a second driven gear. The partition separates the first accommodating chamber and the second accommodating chamber from each other. The partition wall includes a connecting hole that connects the first accommodating chamber and the second accommodating chamber to each other. The connecting hole is located on one direction side in relation to the central axis of the output shaft. At least part of the connecting hole overlaps with the spur gear when viewed in a direction along the central axis.Type: GrantFiled: September 1, 2022Date of Patent: October 3, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN CORPORATIONInventors: Hiroki Takeda, Akihiro Makino, Isao Sato, Haruhisa Suzuki, Yoshiteru Hagino, Koichi Hasegawa, Yasuaki Tahara, Masahiko Kanamaru, Jo Torii, Takeshi Torii, Tokiyoshi Kida
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Publication number: 20230092217Abstract: A driving force transmitting device includes a case, an electric motor, and a gearbox. The electric motor includes an output shaft. The gearbox includes a spur gear that rotates coaxially with the output shaft. The case includes a partition wall, a first accommodating chamber accommodating the electric motor, and a second accommodating chamber that accommodates a second driven gear. The partition separates the first accommodating chamber and the second accommodating chamber from each other. The partition wall includes a connecting hole that connects the first accommodating chamber and the second accommodating chamber to each other. The connecting hole is located on one direction side in relation to the central axis of the output shaft. At least part of the connecting hole overlaps with the spur gear when viewed in a direction along the central axis.Type: ApplicationFiled: September 1, 2022Publication date: March 23, 2023Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN CORPORATIONInventors: Hiroki TAKEDA, Akihiro MAKINO, Isao SATO, Haruhisa SUZUKI, Yoshiteru HAGINO, Koichi HASEGAWA, Yasuaki TAHARA, Masahiko KANAMARU, Jo TORII, Takeshi TORII, Tokiyoshi KIDA
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Patent number: 11232901Abstract: A method for producing a magnetic core includes a processing step of giving a desired shape to a strip made of an alloy composition, a heat-treating step of forming bcc-Fe crystals, and then a stacking step of obtaining a magnetic core having a shape. Here, the alloy composition is Fe—B—Si—P—Cu—C and has an amorphous phase as a primary phase. In the heat-treating step, the strip is heated up to a temperature higher than a crystallization temperature of the alloy composition at a high heating rate.Type: GrantFiled: July 1, 2016Date of Patent: January 25, 2022Assignees: TOHOKU MAGNET INSTITUTE CO., LTD., PANASONIC CORPORATIONInventors: Akihiro Makino, Nobuyuki Nishiyama, Kana Takenaka, Yukio Nishikawa, Terutsugu Segawa
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Publication number: 20210230723Abstract: An alloy composition, a Fe-based nano-crystalline alloy and a manufacturing method thereof, and a magnetic component are disclosed. The expression of the alloy composition is FeaV?BbSicPxCyCuz and 79?a?91 at %, 5?b?13 at %, 0?c?8 at %, 1?x?8 at %, 0?y?5 at %, 0.4?z?1.4 at %, 0<?<5 at % and 0.08?z/x?0.8(at % is atomic percent). The Fe-based nano-crystalline alloy is manufactured by subjecting the alloy composition to crystallization heat treatment. Even if the heating speed upon crystallization heat treatment is slow, or there is a deviation in the temperature reached, a Fe-based nano-crystalline alloy with high saturation magnetic induction intensity and excellent soft magnetic property can still be easily obtained from the alloy ingredients of the present invention. Moreover, the present invention provides a magnetic component manufactured using the Fe-based nano-crystalline alloy.Type: ApplicationFiled: February 2, 2021Publication date: July 29, 2021Inventors: Akihiro Makino, He MEN, Hai GUO, Lishan HUO
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Patent number: 10767249Abstract: A magnetic powder is represented by general formula Fea(SibBcPd)100-a, and is produced with a gas atomization method. When the value of a and the value of b in the general formula is represented (a, b), (a, b) is within a predetermined region V1. Similarly, (a, c) and (a, d) are within a predetermined region, respectively. Whereby, it is possible to obtain an alloy magnetic powder which has high saturation magnetic flux density, low magnetic loss, and is spherical and easy to handle; and a magnetic core, a variety of coil components, and a motor can be realized by using the magnetic material.Type: GrantFiled: July 27, 2017Date of Patent: September 8, 2020Assignees: Murata Manufacturing Co., Ltd., Tohoku Magnet Institute Co., Ltd.Inventors: Toru Takahashi, Kazuhiro Henmi, Akihiro Makino, Noriharu Yodoshi
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Patent number: 10758982Abstract: A magnetic powder is represented by general formula FeaSibBcPdCue. 71.0?a?81.0, 0.14?b/c?5, 0?d?14, 0<e?1.4, d?0.8a?50, e<?0.1(a+d)+10, and a+b+c+d+e=100. A crystallinity is not more than 30% in the case of containing an amorphous phase and a compound phase, and is not more than 60% in the case of not containing a compound phase. The magnetic powder is produced with a gas atomization method. Whereby, it is possible to obtain an alloy magnetic material which has high saturation magnetic flux density and low magnetic loss; and a magnetic core, coil components, and a motor can be realized.Type: GrantFiled: July 27, 2017Date of Patent: September 1, 2020Assignees: Murata Manufacturing Co., Ltd., Tohoku Magnet Institute Co., Ltd.Inventors: Toru Takahashi, Akihiro Makino, Noriharu Yodoshi
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Patent number: 10636567Abstract: A heat treatment apparatus for a laminated body of amorphous alloy ribbon includes: a lamination jig that holds the laminated body of amorphous alloy ribbon; two heating plates that sandwich the laminated body from upper and lower surfaces in a lamination direction without coming into contact with the lamination jig; and a heating control apparatus that controls a heating temperature of the two heating plates.Type: GrantFiled: February 7, 2017Date of Patent: April 28, 2020Assignees: TOHOKU MAGNET INSTITUTE CO., LTD., PANASONIC CORPORATIONInventors: Akihiro Makino, Nobuyuki Nishiyama, Terutsugu Segawa, Tohru Kojima, Yukio Nishikawa
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Patent number: 10461589Abstract: A magnetic-plate laminated body includes: a laminated part made up of a plurality of laminated soft magnetic ribbons; first and second metal plates that sandwich the laminated part from upper and lower surfaces in a lamination direction of the laminated part; and a fastening mechanism that penetrates the first and second metal plates and the laminated part and fastening the laminated part by the first and second metal plates.Type: GrantFiled: February 7, 2017Date of Patent: October 29, 2019Assignees: TOHOKU MAGNET INSTITUTE CO., LTD., PANASONIC CORPORATIONInventors: Akihiro Makino, Nobuyuki Nishiyama, Yukio Nishikawa, Tohru Kojima, Takeshi Ogawa
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Patent number: 10388444Abstract: Alloy powder of a composition formula Fe100-a-b-c-d-e-fCoaBbSicPdCueCf having an amorphous phase as a main phase is provided. Parameters satisfy the following conditions: 3.5?a?4.5 at %, 6?b?15 at %, 2?c?11 at %, 3?d?5 at %, 0.5?e?1.1 at %, and 0?f?2 at %. With this composition, the alloy powder has good magnetic characteristics even when it has a large particle diameter such as 90 ?m. Therefore, yield thereof is improved.Type: GrantFiled: July 17, 2015Date of Patent: August 20, 2019Assignee: TOHOKU MAGNET INSTITUTE CO., LTD.Inventors: Akihiro Makino, Nobuyuki Nishiyama, Parmanand Sharma, Kana Takenaka
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Publication number: 20180166213Abstract: A method for producing a magnetic core includes a processing step of giving a desired shape to a strip made of an alloy composition, a heat-treating step of forming bcc-Fe crystals, and then a stacking step of obtaining a magnetic core having a shape. Here, the alloy composition is Fe—B—Si—P—Cu—C and has an amorphous phase as a primary phase. In the heat-treating step, the strip is heated up to a temperature higher than a crystallization temperature of the alloy composition at a high heating rate.Type: ApplicationFiled: July 1, 2016Publication date: June 14, 2018Applicants: TOHOKU MAGNET INSTITUTE CO., LTD., PANASONIC CORPORATIONInventors: Akihiro MAKINO, Nobuyuki NISHIYAMA, Kana TAKENAKA, Yukio NISHIKAWA, Terutsugu SEGAWA
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Publication number: 20180154434Abstract: A soft magnetic powder according to the present disclosure comprises a particle which comprises a plurality of nanosized crystallites and an amorphous phase existing around the crystallites, wherein the crystallites have an average grain diameter of 30 nm or less, and the amorphous phase has an average thickness of 30 nm or less; and wherein when a minor axis of a cross section of the particle is determined as r, an average Fe concentration in the amorphous phase is lower than an average Fe concentration in the crystallites in a region where a depth from a surface of the particle is 0.2 r or more and 0.4 r or less.Type: ApplicationFiled: January 26, 2018Publication date: June 7, 2018Applicants: Tohoku Magnet Institute Co., Ltd., Murata Manufacturing Co., Ltd.Inventors: Kazuhiro HENMI, Toru TAKAHASHI, Noriharu YODOSHI, Akihiro MAKINO
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Publication number: 20180147625Abstract: A soft magnetic powder according to the present disclosure comprises a particle having no hollow part as a main component, wherein a number of hollow particle present in a region of 2.5 mm square is 40 or less in a cross section of a molded body obtained by powder-compacting and molding the soft magnetic powder so as to have a volume filling rate of 75% or more and 77% or less (i.e., from 75% to 77%).Type: ApplicationFiled: January 29, 2018Publication date: May 31, 2018Applicant: Murata Manufacturing Co., Ltd.Inventors: Toru TAKAHASHI, Kazuhiro HENMI, Noriharu YODOSHI, Akihiro MAKINO
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Publication number: 20180073117Abstract: An alloy composition which includes 82 atomic % to 86 atomic % Fe, 6 atomic % to 12 atomic % B, 3 atomic % to 8 atomic % P, 0.6 atomic % to 1.0 atomic % Cu, 0 atomic % to 5 atomic % C, 0 atomic % to 3 atomic % E, 0 wt. % to 0.5 wt. % Al, 0 wt. % to 0.3 wt. % Ti, 0 wt. % to 0.94 wt. % Mn, 0 wt. % to 0.082 wt. % S, 0 wt. % to 0.3 wt. % O and 0 wt. % to 0.01 wt. % N. In the alloy composition, E is at least one element selected from the group consisting of Zr, Hf, Nb, Ta, Mo, W, Cr, Ag, Zn, Sn, As, Sb, Bi, Y and a rare-earth element, wherein Cr is contained in an amount of 0 atomic % to 1 atomic %, and the total amount of Fe and E is 82 atomic % to 86 atomic %. The alloy composition has a structure which includes an amorphous phase.Type: ApplicationFiled: November 16, 2017Publication date: March 15, 2018Applicants: TOKIN CORPORATION, TOHOKU MAGNET INSTITUTE CO., LTDInventors: Akiri URATA, Yasunobu YAMADA, Hiroyuki MATSUMOTO, Shigeyoshi YOSHIDA, Akihiro MAKINO
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Publication number: 20180044768Abstract: An FeNi alloy composition comprising an L10-type FeNi ordered phase is provided, which satisfies at least one of the conditions that the sum of the content of Fe and the content of Ni is 90 at. % or less and that the FeNi alloy composition contains Si, and preferably satisfies at least one of the conditions that the ratio of the content of Fe to the content of Ni is 0.3 or more and 5 or less and that the sum of the content of Fe and the content of Ni is 65 at. % or more.Type: ApplicationFiled: October 23, 2017Publication date: February 15, 2018Applicant: Tohoku UniversityInventor: Akihiro MAKINO
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Patent number: 9850562Abstract: An Fe-based nano-crystalline alloy formed from an alloy composition of (FeE)(100-X-Y-Z)BXPYCuZ having an amorphous phase as a main phase, wherein 79?100-X-Y-Z?86 atomic %, 4?X?9 atomic %, 1?Y?10 atomic %, and 0.5?Z<1.2 atomic %, and wherein (FeE) includes Fe and at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Mo, W, Cr, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, Y, N, O and a rare-earth element, wherein a combined total of said at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Mo, W, Cr, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, Y, N, O and a rare-earth element is in an amount of 3 atomic % or less relative to the whole composition.Type: GrantFiled: February 26, 2016Date of Patent: December 26, 2017Assignees: TOHOKU MAGNET INSTITUTE CO., LTD, TOKIN CORPORATIONInventors: Akiri Urata, Yasunobu Yamada, Hiroyuki Matsumoto, Shigeyoshi Yoshida, Akihiro Makino
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Publication number: 20170320138Abstract: A magnetic powder is represented by general formula FeaSibBcPdCue. 71.0?a?81.0, 0.14?b/c?5, 0?d?14, 0<e?1.4, d?0.8a?50, e<?0.1(a+d)+10, and a+b+c+d+e=100. A crystallinity is not more than 30% in the case of containing an amorphous phase and a compound phase, and is not more than 60% in the case of not containing a compound phase. The magnetic powder is produced with a gas atomization method. Whereby, it is possible to obtain an alloy magnetic material which has high saturation magnetic flux density and low magnetic loss; and a magnetic core, coil components, and a motor can be realized.Type: ApplicationFiled: July 27, 2017Publication date: November 9, 2017Applicants: Murata Manufacturing Co., Ltd., Tohoku Magnet Institute Co., Ltd.Inventors: Toru TAKAHASHI, Akihiro MAKINO, Noriharu YODOSHI
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Publication number: 20170321308Abstract: A magnetic powder is represented by general formula Fea(SibBcPd)100-a, and is produced with a gas atomization method. When the value of a and the value of b in the general formula is represented (a, b), (a, b) is within a predetermined region V1. Similarly, (a, c) and (a, d) are within a predetermined region, respectively. Whereby, it is possible to obtain an alloy magnetic powder which has high saturation magnetic flux density, low magnetic loss, and is spherical and easy to handle; and a magnetic core, a variety of coil components, and a motor can be realized by using the magnetic material.Type: ApplicationFiled: July 27, 2017Publication date: November 9, 2017Applicants: Murata Manufacturing Co., Ltd., Tohoku Magnet Institute Co., Ltd.Inventors: Toru TAKAHASHI, Kazuhiro HENMI, Akihiro MAKINO, Noriharu YODOSHI