Patents by Inventor Yoshio Kayumi

Yoshio Kayumi 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).

  • Inverter device
    Patent number: 6594162
    Abstract: The inverter device includes an inverse conversion circuit which converts a supplied direct-current electricity into a alternating-current electricity having a predetermined frequency, and is designed to drive a motor for a rotary machine, at various speeds, in which the switching control of the inverse conversion circuit is performed by a digital processor. In this inverter device, a timer interrupt process having an independent constant processing cycle which is not directly related to the processing cycle of the system control in the digital processor is assigned. In the timer interrupt process, whether or not switching of the inverse conversion circuit is required is determined, and the switching control is carried out on the basis of the determination.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: July 15, 2003
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hisanobu Shinoda, Yoshio Kayumi, Tetsuro Shigemizu, Masato Goto, Atsushi Takemura
  • Inverter device
    Publication number: 20020075703
    Abstract: The inverter device includes an inverse conversion circuit which converts a supplied direct-current electricity into a alternating-current electricity having a predetermined frequency, and is designed to drive a motor for a rotary machine, at various speeds, in which the switching control of the inverse conversion circuit is performed by a digital processor. In this inverter device, a timer interrupt process having an independent constant processing cycle which is not directly related to the processing cycle of the system control in the digital processor is assigned. In the timer interrupt process, whether or not switching of the inverse conversion circuit is required is determined, and the switching control is carried out on the basis of the determination.
    Type: Application
    Filed: February 15, 2002
    Publication date: June 20, 2002
    Inventors: Hisanobu Shinoda, Yoshio Kayumi, Tetsuro Shigemizu, Masato Goto, Atsushi Takemura
  • Method and apparatus for forming thin film
    Patent number: 4901669
    Abstract: The present invention is directed to a method for forming a thin film on a substrate by the use of a glow discharge plasma which comprises generating a magnetic field in a direction which crosses an electric field for discharge at right angles and fluctuating the magnetic field.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: February 20, 1990
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Takashi Yamamoto, Shozo Kaneko, Tadashi Gengo, Joji Ichinari, Hiroshi Fujiyama, Yoshio Kayumi, Masayoshi Murata