Patents by Inventor Hiroaki OKUBO

Hiroaki OKUBO 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: 20220149686
    Abstract: According to one embodiment, there is provided an armature winding of a rotating electrical machine, the armature winding being a 3-phase 6 or more even-number pole two-layer wound armature winding. The armature winding includes three or more parallel circuits provided in each phase, an individual coil constituting each of the circuits being connected by wave winding, each circuit being arranged so that phase belts respectively overlap phase belts of “number of poles/2” in the circuits on both adjacent sides, and the phase belts being arranged at different positions in a circumferential direction in each circuit.
    Type: Application
    Filed: January 21, 2022
    Publication date: May 12, 2022
    Inventors: Takashi UEDA, Masafumi FUJITA, Masashi OKUBO, Hiroaki ISHIZUKA
  • Patent number: 11185924
    Abstract: A metal powder for additive manufacturing includes: not less than 0.2 mass % and not more than 1.3 mass % of aluminum; and a balance including copper and an incidental impurity.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: November 30, 2021
    Assignees: DAIHEN CORPORATION, FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Ryusuke Tsubota, Junichi Tanaka, Yohei Oka, Akira Okamoto, Masato Kikukawa, Hiroaki Okubo, Yoshito Nishizawa, Takeshi Maruyama, Motonori Nishida
  • Patent number: 10967431
    Abstract: A metal powder for additive manufacturing includes: not less than 0.2 mass % and not more than 1.3 mass % of aluminum; and a balance including copper and an incidental impurity.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: April 6, 2021
    Assignees: DAIHEN CORPORATION, FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Ryusuke Tsubota, Junichi Tanaka, Yohei Oka, Akira Okamoto, Masato Kikukawa, Hiroaki Okubo, Yoshito Nishizawa, Takeshi Maruyama, Motonori Nishida
  • Publication number: 20200180024
    Abstract: In this invention, a copper powder to which phosphorus (P) is added is developed such that a high-density laminated and shaped product can be obtained by a laminating and shaping method using a fiber laser as a heat source by appropriately reducing the electrical conductivity of copper, so a laminated and shaped product having a high density and a high electrical conductivity can be obtained. This invention is a copper powder for lamination shaping in which a phosphorus element is added to pure copper. The copper powder desirably contains 0.01 wt % or more of the phosphorus element. The copper powder more desirably contains 0.04 wt % or more of the phosphorus element. The copper powder desirably contains 0.30 wt % or less of the phosphorus element. The copper powder more desirably contains 0.24 wt % or less of the phosphorus element. No element other than the phosphorus element is desirably added to the copper powder.
    Type: Application
    Filed: June 21, 2017
    Publication date: June 11, 2020
    Inventors: Yuji SUGITANI, Yoshito NISHIZAWA, Takeshi MARUYAMA, Hiroaki OKUBO OKUBO
  • Publication number: 20200147682
    Abstract: This invention provides a copper powder to which tin (Sn) is added such that a high-density laminated and shaped product can be obtained by a laminating and shaping method using a fiber laser as a heat source by appropriately reducing the electrical conductivity of copper, so a laminated and shaped product having a high density and a high electrical conductivity can be obtained. That is, this invention provides a copper powder for lamination shaping in which a tin element is added to pure copper. Desirably, the copper powder contains 0.5 wt % or more of the tin element. More desirably, the copper powder contains 5.0 wt % or more of the tin element. When the product has an electrical conductivity sufficient as a copper product, the copper powder desirably contains 6.0 wt % or less of the tin element. Furthermore, no element other than the tin element is desirably added to the copper powder.
    Type: Application
    Filed: July 18, 2017
    Publication date: May 14, 2020
    Applicants: FUKUDA METAL FOIL & POWDER CO., LTD., TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Yuji SUGITANI, Yoshito NiSHIZAWA, Takeshi MARUYAMA, Hiroaki OKUBO
  • Publication number: 20190168302
    Abstract: A metal powder for additive manufacturing includes: not less than 0.2 mass % and not more than 1.3 mass % of aluminum; and a balance including copper and an incidental impurity.
    Type: Application
    Filed: February 6, 2019
    Publication date: June 6, 2019
    Applicants: Daihen Corporation, Fukuda Metal Foil & Powder Co., Ltd.
    Inventors: Ryusuke Tsubota, Junichi Tanaka, Yohei Oka, Akira Okamoto, Masato Kikukawa, Hiroaki Okubo, Yoshito Nishizawa, Takeshi Maruyama, Motonori Nishida
  • Publication number: 20190168303
    Abstract: A metal powder for additive manufacturing includes: not less than 0.2 mass % and not more than 1.3 mass % of aluminum; and a balance including copper and an incidental impurity.
    Type: Application
    Filed: February 6, 2019
    Publication date: June 6, 2019
    Applicants: DAIHEN CORPORATION, FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Ryusuke TSUBOTA, Junichi TANAKA, Yohei OKA, Akira OKAMOTO, Masato KIKUKAWA, Hiroaki OKUBO, Yoshito NISHIZAWA, Takeshi MARUYAMA, Motonori NISHIDA
  • Publication number: 20170182557
    Abstract: A metal powder for additive manufacturing includes: not less than 0.2 mass % and not more than 1.3 mass % of aluminum; and a balance including copper and an incidental impurity.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 29, 2017
    Applicants: DAIHEN CORPORATION, FUKUDA METAL FOIL & POWDER CO., LTD.
    Inventors: Ryusuke TSUBOTA, Junichi TANAKA, Yohei OKA, Akira OKAMOTO, Masato KIKUKAWA, Hiroaki OKUBO, Yoshito NISHIZAWA, Takeshi MARUYAMA, Motonori NISHIDA