Patents by Inventor Hiroaki Shibukawa
Hiroaki Shibukawa 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: 9929628Abstract: A magnet insertion method into a rotor core is to insert an assembly into a magnet insertion hole provided in the rotor core of an electric motor, the assembly being formed by laminating a plurality of members, including at least a plurality of magnet pieces, in a line. According to this magnet insertion method, the assembly is formed by arranging a front member, having a surface surrounded by a chamfered ridge line, to cause the surface to be a front side end surface upon insertion, by laminating, on its rear side in an insertion direction, other members, without having the chamfered ridge line, in a line along the insertion direction to cause the other members to be hidden inside a projection of the front member when being projected from an insertion hole side, and by temporarily holding the front member and the other members.Type: GrantFiled: March 27, 2014Date of Patent: March 27, 2018Assignee: Nissan Motor Co., Ltd.Inventors: Takumi Ohshima, Kiyoshi Hasegawa, Takashi Sekikawa, Yasushi Matsushita, Akihisa Hori, Michito Kishi, Hiroaki Shibukawa
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Patent number: 9825513Abstract: A rectangular wire is wound on a stator core having a plurality of teeth and a plurality of slots. A plurality of rectangular wire elements is provided by cutting a rectangular wire into a predetermined length and bending into a substantial U-shape. A plurality of rectangular wire pieces configured to form a coil by connecting predetermined end portions of the rectangular wire elements is molded as a sub-assembly. Each of the plurality of the rectangular wire elements is inserted into a predetermined pair of the slots from a first end face of the stator core such that the respective end portions of the rectangular wire elements project from a second end face of the stator core. The rectangular wire pieces of the sub-assembly are fixed to the end portions of the rectangular wire elements, thereby manufacturing a stator coil having compact coil ends easily.Type: GrantFiled: June 9, 2014Date of Patent: November 21, 2017Assignee: NISSAN MOTOR CO., LTD.Inventors: Takashi Sekikawa, Kimio Nishimura, Masahiro Omata, Yasushi Matsushita, Min Wu, Takumi Ohshima, Hiroaki Shibukawa, Koji Higaki, Kunitomo Ishiguro, Yuhei Yamane
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Patent number: 9779871Abstract: A manufacturing device for cleft magnets comprises a cleaving mechanism for cleaving a magnet plate by applying a pressing force to the magnet plate corresponding to a back of a groove formed on one surface of the magnet plate and a carry-in mechanism for carrying the magnet plate to a cleaving position by the cleaving mechanism. By comprising a foreign matter removal mechanism for removing a foreign matter adhering to the magnet plate before the magnet plate is carried to the cleaving position by the carry-in mechanism, the foreign matter adhering to the magnet plate is removed before cleaving.Type: GrantFiled: September 19, 2013Date of Patent: October 3, 2017Assignee: NISSAN MOTOR CO., LTD.Inventors: Hiroaki Shibukawa, Kimio Nishimura, Masahiro Omata, Takashi Sekikawa, Yasushi Matsushita, Kiyoshi Hasegawa, Akihisa Hori, Takumi Ohshima, Michito Kishi, Hideki Watanabe
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Publication number: 20170187271Abstract: A rectangular wire is wound on a stator core having a plurality of teeth and a plurality of slots. A plurality of rectangular wire elements is provided by cutting a rectangular wire into a predetermined length and bending into a substantial U-shape. A plurality of rectangular wire pieces configured to form a coil by connecting predetermined end portions of the rectangular wire elements is molded as a sub-assembly. Each of the plurality of the rectangular wire elements is inserted into a predetermined pair of the slots from a first end face of the stator core such that the respective end portions of the rectangular wire elements project from a second end face of the stator core. The rectangular wire pieces of the sub-assembly are fixed to the end portions of the rectangular wire elements, thereby manufacturing a stator coil having compact coil ends easily.Type: ApplicationFiled: June 9, 2014Publication date: June 29, 2017Applicant: NISSAN MOTOR CO., LTD.Inventors: Takashi SEKIKAWA, Kimio NISHIMURA, Masahiro OMATA, Yasushi MATSUSHITA, Min WU, Takumi OHSHIMA, Hiroaki SHIBUKAWA, Koji HIGAKI, Kunitomo ISHIGURO, Yuhei YAMENE
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Patent number: 9625539Abstract: A magnet evaluating device evaluates an evaluation magnet by passing the evaluation magnet, which is formed by connecting a plurality of magnetic sections with insulating material in between, and a master magnet of the same form through an alternating magnetic field generated by an excitation coil, measuring the eddy current occurring in the magnetic section as voltage or current occurring in a detection coil and comparing the measured value for the evaluation magnet and the measured value for the master magnet.Type: GrantFiled: February 10, 2014Date of Patent: April 18, 2017Assignee: Nissan Motor Co., Ltd.Inventors: Koji Higaki, Kimio Nishimura, Masahiro Omata, Hideki Watanabe, Yasuhisa Koike, Takashi Sekikawa, Yasushi Matsushita, Akihisa Hori, Takumi Ohshima, Michito Kishi, Kiyoshi Hasegawa, Hiroaki Shibukawa, Kazuhiro Takaichi, Hideo Sakuyama, Yuhei Yamane, Yoshito Ozawa
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Publication number: 20160111944Abstract: A magnet insertion method into a rotor core is to insert an assembly into a magnet insertion hole provided in the rotor core of an electric motor, the assembly being formed by laminating a plurality of members, including at least a plurality of magnet pieces, in a line. According to this magnet insertion method, the assembly is formed by arranging a front member, having a surface surrounded by a chamfered ridge line, to cause the surface to be a front side end surface upon insertion, by laminating, on its rear side in an insertion direction, other members, without having the chamfered ridge line, in a line along the insertion direction to cause the other members to be hidden inside a projection of the front member when being projected from an insertion hole side, and by temporarily holding the front member and the other members.Type: ApplicationFiled: March 27, 2014Publication date: April 21, 2016Inventors: Takumi OHSHIMA, Kiyoshi HASEGAWA, Takashi SEKIKAWA, Yasushi MATSUSHITA, Akihisa HORI, Michito KISHI, Hiroaki SHIBUKAWA
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Publication number: 20160011282Abstract: A magnet evaluating device evaluates an evaluation magnet by passing the evaluation magnet, which is formed by connecting a plurality of magnetic sections with insulating material in between, and a master magnet of the same form through an alternating magnetic field generated by an excitation coil, measuring the eddy current occurring in the magnetic section as voltage or current occurring in a detection coil and comparing the measured value for the evaluation magnet and the measured value for the master magnet.Type: ApplicationFiled: February 10, 2014Publication date: January 14, 2016Applicant: Nissan Motor Co., Ltd.Inventors: Koji HIGAKI, Kimio NISHIMURA, Masahiro OMATA, Hideki WATANABE, Yasuhisa KOIKE, Takashi SEKIKAWA, Yasushi MATSUSHITA, Akihisa HORI, Takumi OHSHIMA, Michito KISHI, Kiyoshi HASEGAWA, Hiroaki SHIBUKAWA, Kazuhiro TAKAICHI, Hideo SAKUYAMA, Yuhei YAMANE, Yoshito OZAWA
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Publication number: 20150270060Abstract: A manufacturing device for cleft magnets comprises a cleaving mechanism for cleaving a magnet plate by applying a pressing force to the magnet plate corresponding to a back of a groove formed on one surface of the magnet plate and a carry-in mechanism for carrying the magnet plate to a cleaving position by the cleaving mechanism. By comprising a foreign matter removal mechanism for removing a foreign matter adhering to the magnet plate before the magnet plate is carried to the cleaving position by the carry-in mechanism, the foreign matter adhering to the magnet plate is removed before cleaving.Type: ApplicationFiled: September 19, 2013Publication date: September 24, 2015Applicant: NISSAN MOTOR CO., LTD.Inventors: Hiroaki Shibukawa, Kimio Nishimura, Masahiro Omata, Takashi Sekikawa, Yasushi Matsushita, Kiyoshi Hasegawa, Akihisa Hori, Takumi Ohshima, Michito Kishi, Hideki Watanabe
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Patent number: 7986064Abstract: There is provided an electrical motor in which the dimensional accuracy of a stator is increased more easily, and the influence exerted on a magnetic circuit is kept as little as possible. In an electrical motor in which the stator 3 formed with n number (n is a positive integer) of teeth 33 in a row in a straight line form is bent into an annular shape and the end parts thereof are connected to each other, the sum of opening angles ? of a cutout 35 formed between segments of the stator 3 is made larger than 360 degrees, and a minute clearance is formed between the opposed surfaces of the cutout 35 when the stator is bent into an annular shape.Type: GrantFiled: May 12, 2009Date of Patent: July 26, 2011Assignee: Fujitsu General LimitedInventors: Shinichiro Katagiri, Hiroaki Shibukawa, Takuya Hamano, Hirokazu Matsuzaki, Toshihiko Yamada, Takushi Fujioka, Yoichi Tanabe, Masaki Yamada, Hidetaka Terakubo, Yoshitaka Kitajima
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Publication number: 20090284096Abstract: There is provided an electrical motor in which the dimensional accuracy of a stator is increased more easily, and the influence exerted on a magnetic circuit is kept as little as possible. In an electrical motor in which the stator 3 formed with n number (n is a positive integer) of teeth 33 in a row in a straight line form is bent into an annular shape and the end parts thereof are connected to each other, the sum of opening angles ? of a cutout 35 formed between segments of the stator 3 is made larger than 360 degrees, and a minute clearance is formed between the opposed surfaces of the cutout 35 when the stator is bent into an annular shape.Type: ApplicationFiled: May 12, 2009Publication date: November 19, 2009Applicant: FUJITSU GENERAL LIMITEDInventors: Shinichiro Katagiri, Hiroaki Shibukawa, Takuya Hamano, Hirokazu Matsuzaki, Toshihiko Yamada, Takushi Fujioka, Yoichi Tanabe, Masaki Yamada, Hidetaka Terakubo, Yoshitaka Kitajima