Patents by Inventor Toshio Ishikawa

Toshio Ishikawa 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).

  • Publication number: 20220069651
    Abstract: A rotary electric machine includes a rotor, a stator, and stator windings. The stator winding has a plurality of slot conductor groups having a plurality of slot conductors of the same phase. A plurality of slot conductors of the slot conductor group are inserted into a predetermined number (Ns) of slots continuously arranged in a circumferential direction of the stator core such that the slot and the layer are adjacent to each other. The predetermined number (Ns) is set to “Ns=NSPP+1,” where “NSPP” denotes the number of slots per pole per phase.
    Type: Application
    Filed: August 27, 2020
    Publication date: March 3, 2022
    Inventors: Yasuyuki SAITO, Yuji KANOH, Toshio ISHIKAWA
  • Publication number: 20210092898
    Abstract: A manufacturing method for a mower cord and including pressing a resin wire rod and plastically deforming at least part of the wire rod in an axis perpendicular direction. Work-hardening of a surface of the plastically deformed portion allows dramatic enhancement of mowing efficiency.
    Type: Application
    Filed: December 1, 2020
    Publication date: April 1, 2021
    Inventors: Toshio ISHIKAWA, Shigeki ICHIKAWA, Masaya SUZUKI
  • Patent number: 10945365
    Abstract: The present invention relates to a manufacturing method for a mower cord and includes pressing a resin wire rod and plastically deforming at least part of the wire rod in an axis perpendicular direction. Work-hardening of a surface of the plastically deformed portion allows dramatic enhancement of mowing efficiency.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: March 16, 2021
    Assignee: Sanyo Tegusu Co., Ltd.
    Inventors: Toshio Ishikawa, Shigeki Ichikawa, Masaya Suzuki
  • Patent number: 10910899
    Abstract: The productivity of a rotary electric machine worsens because the axial length of a stator increases, increasing the overall size, and connecting parts are located on both end sides of a stator core. The rotary electric machine includes: a stator core; a stator winding including a plurality of segment coils; and a connection board that fixes a different-phase connection conductor adapted to connect different phases of the segment coils of the stator winding and a same-phase connection conductor adapted to connect the segment coils of the same phase of the stator winding. The stator winding has, on one side with respect to an axial direction of the stator core, a coil connection section where end portions of the plurality of segment coils are connected to each other, and the connection board is disposed on a side on which the coil connection section is disposed, with respect to the stator core.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: February 2, 2021
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Toshio Ishikawa, Shinji Yamazaki, Hiromitsu Okamoto, Tomohiro Fukuda
  • Patent number: 10797550
    Abstract: Provided is a high-torque low-noise rotary electric machine. In a rotary electric machine, a jumper conductor having a normal slot pitch connects slot conductors by striding slots with a slot pitch “Np=N(=6)” in one of coil ends and striding slots with a slot pitch “Np=N(=6)” in the other coil end, assuming that the number of slots per pole is set to “N(=6).” The jumper conductor having an irregular slot pitch connects the slot conductors by striding slots with a slot pitch “Np=N+1(=7)” in one of the coil ends and striding slots with a slot pitch “Np=N?1(=5)” in the other coil end, assuming that the number of slots per pole is set to “N(=6).” The stator winding has a plurality of slot conductor groups consisting of a plurality of slot conductors having the same phase.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: October 6, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yasuyuki Saito, Yuji Kanoh, Toshio Ishikawa
  • Patent number: 10566873
    Abstract: Provided is a rotating electrical machine including a housing in which a flow passage of cooling liquid can be easily formed and airtightness and productivity are high. A rotating electrical machine is configured to include a housing which is provided with a part of a flow passage of cooling liquid, a stator which is disposed on an inner circumferential side of the housing and includes a stator winding, and a rotor which is rotatably supported to an inner circumferential side of the stator with a gap between the stator and the rotor and the flow passage of the cooling liquid includes an annular groove having an open surface on at least one side of an axial direction of the housing and a plate provided to cover the open surface. Preferably, the housing and the plate are configured to be joined by welding or an adhesive material.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: February 18, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Toshio Ishikawa, Masahiko Honma
  • Patent number: 10320249
    Abstract: A permanent magnet rotating electric machine includes a stator and a rotor disposed with an air gap interposed between the stator and the rotor. The rotor is provided with a rotor core provided with a plurality of magnet insertion holes in a circumferential direction, and a press-fit body pressed into each of the magnet insertion holes. The press-fit body includes a permanent magnet and a magnet fixing member provided on the sides of the permanent magnet. The press-fit body is fixed within the magnet insertion hole in such a way that, in the circumferential direction, one end of the press-fit body makes a line contact with the inner wall of the magnet insertion hole through a line contact portion of the magnet fixing member and the other end thereof makes a surface contact with the inner wall of the magnet insertion holes through a surface contact portion of the magnet fixing member.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: June 11, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Hiromitsu Okamoto, Masahiko Honma, Toshio Ishikawa
  • Publication number: 20190149003
    Abstract: The productivity of a rotary electric machine worsens because the axial length of a stator increases, increasing the overall size, and connecting parts are located on both end sides of a stator core. The rotary electric machine includes: a stator core; a stator winding including a plurality of segment coils; and a connection board that fixes a different-phase connection conductor adapted to connect different phases of the segment coils of the stator winding and a same-phase connection conductor adapted to connect the segment coils of the same phase of the stator winding. The stator winding has, on one side with respect to an axial direction of the stator core, a coil connection section where end portions of the plurality of segment coils are connected to each other, and the connection board is disposed on a side on which the coil connection section is disposed, with respect to the stator core.
    Type: Application
    Filed: March 27, 2017
    Publication date: May 16, 2019
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Toshio ISHIKAWA, Shinji YAMAZAKI, Hiromitsu OKAMOTO, Tomohiro FUKUDA
  • Publication number: 20180064026
    Abstract: The present invention relates to a manufacturing method for a mower cord and includes pressing a resin wire rod and plastically deforming at least part of the wire rod in an axis perpendicular direction. Work-hardening of a surface of the plastically deformed portion allows dramatic enhancement of mowing efficiency.
    Type: Application
    Filed: March 2, 2015
    Publication date: March 8, 2018
    Inventors: Toshio ISHIKAWA, Shigeki ICHIKAWA, Masaya SUZUKI
  • Publication number: 20170353071
    Abstract: Provided is a high-torque low-noise rotary electric machine. In a rotary electric machine, a jumper conductor having a normal slot pitch connects slot conductors by striding slots with a slot pitch “Np=N(=6)” in one of coil ends and striding slots with a slot pitch “Np=N(=6)” in the other coil end, assuming that the number of slots per pole is set to “N(=6).” The jumper conductor having an irregular slot pitch connects the slot conductors by striding slots with a slot pitch “Np=N+1(=7)” in one of the coil ends and striding slots with a slot pitch “Np=N?1(=5)” in the other coil end, assuming that the number of slots per pole is set to “N(=6).” The stator winding has a plurality of slot conductor groups consisting of a plurality of slot conductors having the same phase.
    Type: Application
    Filed: December 16, 2015
    Publication date: December 7, 2017
    Inventors: Yasuyuki SAITO, Yuji KANOH, Toshio ISHIKAWA
  • Publication number: 20170294820
    Abstract: Provided is a rotating electrical machine including a housing in which a flow passage of cooling liquid can be easily formed and airtightness and productivity are high. A rotating electrical machine is configured to include a housing which is provided with a part of a flow passage of cooling liquid, a stator which is disposed on an inner circumferential side of the housing and includes a stator winding, and a rotor which is rotatably supported to an inner circumferential side of the stator with a gap between the stator and the rotor and the flow passage of the cooling liquid includes an annular groove having an open surface on at least one side of an axial direction of the housing and a plate provided to cover the open surface. Preferably, the housing and the plate are configured to be joined by welding or an adhesive material.
    Type: Application
    Filed: August 17, 2015
    Publication date: October 12, 2017
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Toshio ISHIKAWA, Masahiko HONMA
  • Patent number: 9534321
    Abstract: A monofilament for mowing characterized by being produced by spinning a resin composition, said resin composition comprising 70-97 parts by weight of a polylactic acid resin (A) and 30-3 parts by weight of an adipate plasticizer (B), each relative to 100 parts by weight of the sum of the polylactic acid resin (A) and the adipate plasticizer (B). Thus, the monofilament for mowing, which is biodegradable, shows an excellent mowing performance and has a high breakage resistance and high abrasion resistance, is provided.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: January 3, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Toshio Ishikawa, Masanori Kobayashi, Shinya Kuroda, Takayuki Hase
  • Publication number: 20160359384
    Abstract: A permanent magnet rotating electric machine includes a stator and a rotor disposed with an air gap interposed between the stator and the rotor. The rotor is provided with a rotor core provided with a plurality of magnet insertion holes in a circumferential direction, and a press-fit body pressed into each of the magnet insertion holes. The press-fit body includes a permanent magnet and a magnet fixing member provided on the sides of the permanent magnet. The press-fit body is fixed within the magnet insertion hole in such a way that, in the circumferential direction, one end of the press-fit body makes a line contact with the inner wall of the magnet insertion hole through a line contact portion of the magnet fixing member and the other end thereof makes a surface contact with the inner wall of the magnet insertion holes through a surface contact portion of the magnet fixing member.
    Type: Application
    Filed: January 7, 2015
    Publication date: December 8, 2016
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Hiromitsu OKAMOTO, Masahiko HONMA, Toshio ISHIKAWA
  • Patent number: 9166461
    Abstract: To provide a high-quality, high-output, and low-cost automotive alternator by suppressing heat generation through the reduction of current loss in a heat dissipating plate of a rectifier without expanding a space for placing the heat dissipating plate and reducing the cooling performance of the heat dissipating plate. An automotive alternator includes a rectifier, wherein the rectifier is configured such that a heat dissipating plate of positive pole to which the rectifier element of positive pole is mounted is disposed opposite to a heat dissipating plate of negative pole to which a plurality of rectifier elements of negative pole are mounted; wherein the heat dissipating plate of positive pole is made up of a first heat dissipating plate and a second heat dissipating plate, which are made of two different materials.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: October 20, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Toshio Ishikawa, Mitsuaki Izumi, Kunihiro Ohsawa
  • Patent number: 9077234
    Abstract: A vehicle AC generator includes a stator having stator windings; front frame and rear frame, each rotatably supporting a rotor; a cooling fan fitted to the rotor; first polarity arm and second polarity arm configured to rectify currents of one polarity and another polarity, respectively; a rectifier device configured to rectify an alternating current generated in the stator windings; and a protective cover covering the rectifier device. The rectifier device includes a first heat dissipating plate having rectifier elements forming the first polarity arm, a second heat dissipating plate rectifier elements forming the second polarity arm, and a connection plate formed in waveform-like shape and disposed between the first and second heat dissipating plates, and a passage of a cooling air blown by the cooling fan formed between the first and second heat dissipating plates and between the second heat dissipating plate and the connection plate.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: July 7, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Toshio Ishikawa, Yosuke Umesaki, Mitsuaki Izumi, Naoyuki Taguchi, Tsuyoshi Harada
  • Publication number: 20150099836
    Abstract: A monofilament for mowing characterized by being produced by spinning a resin composition, said resin composition comprising 70-97 parts by weight of a polylactic acid resin (A) and 30-3 parts by weight of an adipate plasticizer (B), each relative to 100 parts by weight of the sum of the polylactic acid resin (A) and the adipate plasticizer (B). Thus, the monofilament for mowing, which is biodegradable, shows an excellent mowing performance and has a high breakage resistance and high abrasion resistance, is provided.
    Type: Application
    Filed: April 19, 2013
    Publication date: April 9, 2015
    Applicants: TORAY INDUSTRIES, INC., SANYO TEGUSU CO., LTD.
    Inventors: Toshio Ishikawa, Masanori Kobayashi, Shinya Kuroda, Takayuki Hase
  • Publication number: 20150028704
    Abstract: A high-output, high-efficiency and high-quality rotating electrical machine is provided which has a stator shaped to avoid interference between coil end portions even in cases where the coil space factor of stator coils is raised and the stator coils are formed by winding continuous wires, each having a rectangular cross-section, for high productivity. The stator coils include coils of plural turns straddling plural slots with the coils thus wound interconnected, to be continuous, with connectors. The stator has a stator core mounted, around an entire periphery thereof, with plural stator coils. The coil-end apex portions, disposed on both axial end sides of the stator core, are each approximately Z-shaped without any twisted portion. Each coil-end apex portion is divided into levels of different heights from the stator core end face in the axial direction. In this way, the thickness of overlapping coil layers is reduced to avoid interference between coil end portions.
    Type: Application
    Filed: January 23, 2013
    Publication date: January 29, 2015
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Kunihiro Ohsawa, Yasuhiko Kimura, Toshio Ishikawa, Masahiko Honma
  • Publication number: 20140354095
    Abstract: Provided is a high-output, high-efficiency, and high-quality rotating electrical machine that is excellent in productivity, can prevent interference in coil end portions of stator coils, and has a stator with improved coolability. A stator coil 7 includes coils 74, 75 each of which is wound by a plurality of times across a plurality of slots and a connector 73 which connects the wound coils to each other so as to be continuously formed. A plurality of sets of stator coils 7 are arranged over the entire circumference of a stator core 6. Coil turn portions 74ct which are folded on vertexes of coil ends arranged in the axial direction of the stator core are each formed in a U shape, and radially arranged so that side faces thereof face the center. A gap penetrating from an inner peripheral side to an outer peripheral side is provided between adjacent ones of the coil turn portions 74ct on the vertexes of the coil ends.
    Type: Application
    Filed: October 31, 2012
    Publication date: December 4, 2014
    Inventors: Toshio Ishikawa, Masahiko Honma, Kunihiro Ohsawa, Yasuhiko Kimura
  • Patent number: 8823236
    Abstract: An object is to provide a rotating electric machine offering a high output and high efficiency by balancing inductance of each phase even if a stator is used in which stator windings of different phases are disposed in a slot of a stator core in a three-phase winding. A stator 5 includes a stator core 6 having a plurality of slots arrayed circumferentially and opening to an inner peripheral surface and a stator winding 7 wound in each of the slots. The stator winding 7 is divided into at least two for each phase (7U-A, 7U-B, 7V-A, 7V-B, 7W-A, 7W-B). After insertion of the stator core 6, the stator winding of each phase is connected in parallel or in series. The stator winding of each phase is disposed in slots such that combined inductance of different phases is equalized.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: September 2, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Toshio Ishikawa, Yasuhiko Kimura, Yoshimi Mori, Masahiko Honma, Yosuke Umesaki
  • Patent number: D913759
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: March 23, 2021
    Inventor: Toshio Ishikawa