Patents by Inventor Junichiro Otsuka

Junichiro Otsuka 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).

  • Car AC generator with a slip ring support and a slinger unit that cooperate to form a labyrinth that prevents fluid entry into an interior chamber
    Patent number: 6259182
    Abstract: To prevent water entering a labyrinth from flowing into contact portions between slip rings and brushes, the labyrinth is formed as a stepped structure by an annular slinger-side stepped portion projecting toward a generator shaft from the inner peripheral surface of a slinger unit and a slip ring-side stepped portion projecting toward the slinger unit from the outer peripheral surface of a slip ring support unit.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: July 10, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Nobuatsu Yoshioka, Shigeru Onoue, Junichiro Otsuka