Patents by Inventor Ichiro Shirokawa

Ichiro Shirokawa 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).

  • Antenna apparatus
    Patent number: 6559805
    Abstract: There is disclosed an antenna apparatus used for satellite communication or the like and including an antenna rotating in an azimuth angle direction and an elevation angle direction, which can be miniaturized without using a slip ring for ensuring electrical connection between a stationary portion and a movable portion. A rotary member 3 is rotated by rotation of a motor 5 to rotate an antenna 11 about an azimuth axis. On the other hand, a motor 9 is rotated to rotate a rotary member 7, and a relative rotary shaft 14 is rotated by relative rotation between the rotary member 3 and the rotary member 7. The rotation of the relative rotary shaft 14 rotates the antenna 11 about an elevation angle axis by rotation transmission through a bevel gear 18 and a bevel gear 19.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: May 6, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hidetaka Yamauchi, Ichiro Shirokawa, Tomoaki Fukushima
  • Antenna apparatus and waveguide rotary coupler
    Patent number: 6556165
    Abstract: An AC power source applies power to a primary coil that is provided in a fixed part. An AC current flowing through the primary coil induces electromotive force in a secondary coil that is provided in a movable part. The AC electromotive force induced in the secondary coil is converted by an AC/DC converter into DC power, which is input to a drive control section.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: April 29, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tomoaki Fukushima, Ichiro Shirokawa, Hidetaka Yamauchi, Yoshihiko Konishi, Akio Iida
  • Antenna apparatus
    Publication number: 20020140620
    Abstract: There is disclosed an antenna apparatus used for satellite communication or the like and including an antenna rotating in an azimuth angle direction and an elevation angle direction, which can be miniaturized without using a slip ring for ensuring electrical connection between a stationary portion and a movable portion. A rotary member 3 is rotated by rotation of a motor 5 to rotate an antenna 11 about an azimuth axis. On the other hand, a motor 9 is rotated to rotate a rotary member 7, and a relative rotary shaft 14 is rotated by relative rotation between the rotary member 3 and the rotary member 7. The rotation of the relative rotary shaft 14 rotates the antenna 11 about an elevation angle axis by rotation transmission through a bevel gear 18 and a bevel gear 19.
    Type: Application
    Filed: November 8, 2001
    Publication date: October 3, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Hidetaka Yamauchi, Ichiro Shirokawa, Tomoaki Fukushima
  • Antenna apparatus and waveguide rotary coupler
    Publication number: 20020130808
    Abstract: An AC power source applies power to a primary coil that is provided in a fixed part. An AC current flowing through the primary coil induces electromotive force in a secondary coil that is provided in a movable part. The AC electromotive force induced in the secondary coil is converted by an AC/DC converter into DC power, which is input to a drive control section.
    Type: Application
    Filed: November 5, 2001
    Publication date: September 19, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Tomoaki Fukushima, Ichiro Shirokawa, Hidetaka Yamauchi, Yoshihiko Konishi, Akio Iida