Patents by Inventor Ryosuke Umezu

Ryosuke Umezu 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).

  • Friction stir welding of a solder coated strand coil to a solid coil
    Patent number: 10381904
    Abstract: A rotor coil for a revolving armature includes a strand coil that includes a part arranged in a core slot of the rotor and is composed of a plurality of element wires; and a solid coil welded to an end of the strand coil wherein the end of the strand coil and an end of the solid coil are welded by friction stir welding. A manufacturing method of a rotor coil includes the step of performing friction stir welding wherein the friction stir welding is performed for the butt joint with the end of the strand coil arranged in an advancing side defined by a rotation direction of a tool and with the solid coil arranged in a retreating side.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: August 13, 2019
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Ryosuke Umezu, Yasuaki Kageyama, Juichi Enyama, Seunghwan Park, Satoshi Hirano
  • ROTOR COIL FOR ARMATURE OF ROTATING MACHINE AND PRODUCTION METHOD THEREOF
    Publication number: 20170133917
    Abstract: A rotor coil for a revolving armature includes a strand coil that includes a part arranged in a core slot of the rotor and is composed of a plurality of element wires; and a solid coil welded to an end of the strand coil wherein the end of the strand coil and an end of the solid coil are welded by friction stir welding. A manufacturing method of a rotor coil includes the step of performing friction stir welding wherein the friction stir welding is performed for the butt joint with the end of the strand coil arranged in an advancing side defined by a rotation direction of a tool and with the solid coil arranged in a retreating side.
    Type: Application
    Filed: January 13, 2017
    Publication date: May 11, 2017
    Inventors: Ryosuke UMEZU, Yasuaki KAGEYAMA, Juichi ENYAMA, Seunghwan PARK, Satoshi HIRANO
  • Rotor coil for armature of rotating machine and production method thereof
    Patent number: 9570965
    Abstract: A rotor coil for a revolving armature includes a strand coil that includes a part arranged in a core slot of the rotor and is composed of a plurality of element wires; and a solid coil welded to an end of the strand coil wherein the end of the strand coil and an end of the solid coil are welded by friction stir welding. A manufacturing method of a rotor coil includes the step of performing friction stir welding wherein the friction stir welding is performed for the butt joint with the end of the strand coil arranged in an advancing side defined by a rotation direction of a tool and with the solid coil arranged in a retreating side.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: February 14, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Ryosuke Umezu, Yasuaki Kageyama, Juichi Enyama, Seunghwan Park, Satoshi Hirano