Patents by Inventor Daichi Maruyama

Daichi Maruyama 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).

  • Patent number: 11973405
    Abstract: A stator for a rotating electric machine includes a stator core, a coil having a coil end, a cooling jacket that is attached to the stator core so as to house the coil end in the cooling jacket and that allows cooling oil to flow therethrough, introduction parts, and discharge parts. The coil end includes first portions, extending parallel to an end surface of the stator core, and pairs of second portions, each pair being connected to both ends of a corresponding one of the first portions, the pairs extending in a direction parallel to an axial direction. The cooling jacket includes an inner circumferential wall and an outer circumferential wall. The introduction parts are provided on the outer circumferential wall, and the discharge parts are provided on the inner circumferential wall.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: April 30, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Sumio Shirai, Daichi Maruyama
  • Publication number: 20220190683
    Abstract: A stator for a rotating electric machine includes a stator core, a coil having a coil end, a cooling jacket that is attached to the stator core so as to house the coil end in the cooling jacket and that allows cooling oil to flow therethrough, introduction parts, and discharge parts. The coil end includes first portions, extending parallel to an end surface of the stator core, and pairs of second portions, each pair being connected to both ends of a corresponding one of the first portions, the pairs extending in a direction parallel to an axial direction. The cooling jacket includes an inner circumferential wall and an outer circumferential wall. The introduction parts are provided on the outer circumferential wall, and the discharge parts are provided on the inner circumferential wall.
    Type: Application
    Filed: November 23, 2021
    Publication date: June 16, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Sumio SHIRAI, Daichi MARUYAMA
  • Patent number: 11309777
    Abstract: A rotating electrical machine capable of obtaining a higher torque while limiting the amount of permanent magnets used. A magnetic pole of a rotor includes an auxiliary magnet embedded in a rotor core and at least one main magnet arranged on an outer circumferential side than the auxiliary magnet of the rotor. In each magnetic pole, the distance from an end of the main magnet, the end facing the auxiliary magnet, to the auxiliary magnet facing the main magnet is shorter than the length of the main magnet in the radial direction. In a cross-section orthogonal to the rotation axis of the rotating electrical machine, the main magnets of each magnetic pole are arranged so as to be asymmetrical about a virtual line passing the rotation axis and axisymmetrically dividing the auxiliary magnet.
    Type: Grant
    Filed: March 4, 2021
    Date of Patent: April 19, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keiu Kanada, Daisuke Ichigozaki, Kazuaki Haga, Motoki Hiraoka, Daichi Maruyama, Hisamitsu Toshida, Kyoko Nakamura, Akira Yamashita
  • Publication number: 20210281153
    Abstract: A rotating electrical machine capable of obtaining a higher torque while limiting the amount of permanent magnets used. A magnetic pole of a rotor includes an auxiliary magnet embedded in a rotor core and at least one main magnet arranged on an outer circumferential side than the auxiliary magnet of the rotor. In each magnetic pole, the distance from an end of the main magnet, the end facing the auxiliary magnet, to the auxiliary magnet facing the main magnet is shorter than the length of the main magnet in the radial direction.
    Type: Application
    Filed: March 4, 2021
    Publication date: September 9, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keiu KANADA, Daisuke ICHIGOZAKI, Kazuaki HAGA, Motoki HIRAOKA, Daichi MARUYAMA, Hisamitsu TOSHIDA, Kyoko NAKAMURA, Akira YAMASHITA
  • Publication number: 20160042833
    Abstract: A method for manufacturing an element wire assembly includes: a first step of bunching up and rolling or drawing a plurality of circular cross-section conducting wires (1) to shape each of the conducting wires into a polygon in cross section and form the conducting wires (1?) and form a conducting wire assembly (10); and a second step of heat-treating the conducting wire assembly (10) to form an oxide film (2) on the periphery of each of the conducting wires (1?) to form element wires (3) and, form an element wire assembly (20).
    Type: Application
    Filed: April 8, 2014
    Publication date: February 11, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshitomo KAWANISHI, Daichi MARUYAMA, Shuxin DONG, Hisaaki TAKAO, Shinya URATA, Atsuto OKAMOTO, Hideo NAKAI
  • Patent number: 8034883
    Abstract: A powdered resin composition for slush molding comprising a thermoplastic polyurethane resin powder (B) as the main component and a fine particle powder (A) of a vinyl type copolymer comprising a copolymer of a monomer (a01) having one vinyl group such as methyl methacrylate and a monomer (a02) having two or more vinyl groups such as ethylene glycol dimethacrylate and having a cross-linked structure; or a fine particle powder (E) of a vinyl type copolymer comprising the (a01) and a monomer (a03) having one or more vinyl groups and one or more functional groups other than a vinyl group such as hydroxyethyl (meth)acrylate and having a cross-linked structure. The fine particle powder is a powder flowability improver which does not cause die stains and the powdered resin composition for slush molding containing the fine powder do not cause staining of molds.
    Type: Grant
    Filed: March 14, 2005
    Date of Patent: October 11, 2011
    Assignees: Sanyo Chemical Industries, Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinya Fujibayashi, Shogo Nishioka, Daichi Maruyama, Akira Nomura
  • Publication number: 20070287793
    Abstract: A powdered resin composition for slush molding comprising a thermoplastic polyurethane resin powder (B) as the main component and a fine particle powder (A) of a vinyl type copolymer comprising a copolymer of a monomer (a01) having one vinyl group such as methyl methacrylate and a monomer (a02) having two or more vinyl groups such as ethylene glycol dimethacrylate and having a cross-linked structure; or a fine particle powder (E) of a vinyl type copolymer comprising the (a01) and a monomer (a03) having one or more vinyl groups and one or more functional groups other than a vinyl group such as hydroxyethyl (meth)acrylate and having a cross-linked structure. The fine particle powder is a powder flowability improver which does not cause die stains and the powdered resin composition for slush molding containing the fine powder do not cause staining of molds.
    Type: Application
    Filed: March 14, 2005
    Publication date: December 13, 2007
    Applicants: Sanyo Chemical Industries, Ltd, Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinya Fujibayashi, Shogo Nishioka, Daichi Maruyama, Akira Nomura