Patents by Inventor Hirokazu Madarame

Hirokazu Madarame 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: 10027194
    Abstract: An object of the present invention is to provide a motor rotor support suitable for an axial gap motor and a method for manufacturing the same. The motor rotor support for supporting a magnetic body disposed on a rotor of the motor is configured by laminating single materials each formed from a hot-worked material or a cold-worked material preferably composed of an 18Mn-18Cr nonmagnetic steel.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: July 17, 2018
    Assignees: THE JAPAN STEEL WORKS, LTD., SANWAKOGYO Ltd.
    Inventors: Shinji Tanaka, Hirokazu Madarame, Toshifumi Nakajima, Kazuhiro Miyagi
  • Patent number: 9800104
    Abstract: An object of the present invention is to provide a motor rotor support suitable for an axial gap motor and a method for manufacturing the same. The motor rotor support for supporting a magnetic body disposed on a rotor of a motor is configured by a nonmagnetic steel having a relative permeability of less than 1.005 and a 0.2% yield strength at room temperature of 550 MPa or more.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: October 24, 2017
    Assignees: THE JAPAN STEEL WORKS, LTD., SANWAKOGYO Ltd.
    Inventors: Shinji Tanaka, Hirokazu Madarame, Toshifumi Nakajima, Kazuhiro Miyagi
  • Publication number: 20150326078
    Abstract: An object of the present invention is to provide a motor rotor support suitable for an axial gap motor and a method for manufacturing the same. The motor rotor support for supporting a magnetic body disposed on a rotor of a motor is configured by a nonmagnetic steel having a relative permeability of less than 1.005 and a 0.2% yield strength at room temperature of 550 MPa or more.
    Type: Application
    Filed: March 27, 2013
    Publication date: November 12, 2015
    Applicants: SANWAKOGYO Ltd., THE JAPAN STEEL WORKS, LTD.
    Inventors: Shinji TANAKA, Hirokazu MADARAME, Toshifumi NAKAJIMA, Kazuhiro MIYAGI
  • Publication number: 20150054360
    Abstract: An object of the present invention is to provide a motor rotor support suitable for an axial gap motor and a method for manufacturing the same. The motor rotor support for supporting a magnetic body disposed on a rotor of the motor is configured by laminating single materials each formed from a hot-worked material or a cold-worked material preferably composed of an 18Mn-18Cr nonmagnetic steel.
    Type: Application
    Filed: March 27, 2013
    Publication date: February 26, 2015
    Applicants: SANWAKOGYO LTD., THE JAPAN STEEL WORKS, LTD.
    Inventors: Shinji Tanaka, Hirokazu Madarame, Toshifumi Nakajima, Kazuhiro Miyagi
  • Patent number: 5266264
    Abstract: The present invention relates to a process for producing sinters, including a steps of mixing a powder material with a binder, injection molding the mixture, and then dewaxing and sintering the resulting injection molded article, wherein the binder comprises at least one of: copolymer, a mixture of copolymer, paraffine wax, carnauba wax, a mixture of the paraffine wax and the carnauba wax, a plasticizer, and a lubricant. According to the present invention, the dewaxing step comprises heating the injection molded article to a temperature of 250.degree.-500.degree. C. in a heating rate of 5.degree.-100.degree. C./hour under the pressure not higher than 1 Torr in order to remove 40%-95 % by weight of the binder components. Further, the temperature elevation in the sintering step is started in a vacuum atmosphere and replacing the atmosphere with an inert gas atmosphere in the process of temperature elevation.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: November 30, 1993
    Assignee: The Japan Steel Works Ltd.
    Inventors: Ritsu Miura, Hirokazu Madarame, Masahiro Uchida, Yasushi Owaki