Patents by Inventor Michihiro Kugioka

Michihiro Kugioka 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: 6704038
    Abstract: A dynamic pressure bearing apparatus having high performance and excellent stability without hindering operations of appliances due to a leaked oil, the dynamic pressure bearing apparatus including: a rotating shaft inclined in a predetermined direction from a vertical direction; a sleeve rotatably supporting the rotating shaft; an operating fluid for generating a dynamic pressure, the operating fluid being filled in a gap formed between the sleeve and the rotating shaft; and a capturing device for capturing the operating fluid leaked from the gap, the capturing device being disposed on an outside surface of the sleeve in the predetermined direction.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: March 9, 2004
    Assignees: Canon Seiki Kabushiki Kaisha, Canon Kabushiki Kaisha
    Inventors: Hideyuki Nishida, Michihiro Kugioka, Mikio Nakasugi, Masayoshi Asami, Ichiro Maekawa, Nobuo Nakajima, Hiromasa Masuda
  • Publication number: 20020037116
    Abstract: To provide a dynamic pressure bearing apparatus having high performance and excellent stability without hindering operations of appliances due to a leaked oil, the dynamic pressure bearing apparatus of the present invention comprises; a rotating shaft inclined in a predetermined direction from a vertical direction; a sleeve rotatably supporting the rotating shaft; an operating fluid for generating a dynamic pressure, the operating fluid being filled in a gap formed between the sleeve and the rotating shaft; and capturing means for capturing the operating fluid leaked from the gap, the capturing means being disposed on an outside surface of the sleeve in the predetermined direction.
    Type: Application
    Filed: September 20, 2001
    Publication date: March 28, 2002
    Inventors: Hideyuki Nishida, Michihiro Kugioka, Mikio Nakasugi, Masayoshi Asami, Ichiro Maekawa, Nobuo Nakajima, Hiromasa Masuda
  • Patent number: 4857817
    Abstract: In this invention, an excitation current is switched in accordance with a change in number of phases so as to reduce an excitation current per phase in a 2-phase mode to be smaller than that in a 1-phase mode. The excitation current in the 2-phase mode is set to be about 0.6 to 0.8 times larger than that in the 1-phase mode, so that a constant torque is always generated.
    Type: Grant
    Filed: January 26, 1988
    Date of Patent: August 15, 1989
    Assignees: Canon Kabushiki Kaisha, Canon Seki Kabushiki Kaisha
    Inventor: Michihiro Kugioka
  • Patent number: 4639084
    Abstract: A lens barrel provided therein with a hollow cylindrical permanent magnet having a permanent magnet portion for stepping drive and a magnet portion for brushless drive, a step driving coil and a brushless driving coil, and a focusing lens system axially moved by the rotary motion of the cylindrical permanent magnet. In case the amount of movement of the lens system required for bringing it to the focused position exceeds a determined value, the lens system is moved to a position corresponding to the determined value by the rotary motion of the brushless driving permanent magnet portion, and in case the above-mentioned amount is equal to or less than the determined value, the lens system is brought to the focused position by the rotary motion of the step driving permanent magnet portion.
    Type: Grant
    Filed: December 26, 1984
    Date of Patent: January 27, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventor: Michihiro Kugioka