Patents by Inventor Yasuyuki Ooe

Yasuyuki Ooe 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).

  • Power tool
    Patent number: 7375447
    Abstract: A power tool includes: a stator having a substantially cylindrical yoke and a plurality of permanent magnets that are firmly fixed to an inner surface of the yoke and circumferentially spaced from each other by a first gap; a rotor inserted inside the permanent magnets at a second gap radially; an outer frame portion that accommodates the stator and the rotor; a ventilation hole formed in the outer frame portion to place the first and second gaps in communication with an atmosphere; and a dustproof member comprising a ferromagnetic material, which is mounted in contact with the stator and has a protruding portion located in a passage going from the first and second gaps to the atmosphere via the ventilation hole.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: May 20, 2008
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Katsuhiro Oomori, Atsushi Nakagawa, Yasuyuki Ooe
  • Power tool
    Publication number: 20050200215
    Abstract: A power tool includes: a stator having a substantially cylindrical yoke and a plurality of permanent magnets that are firmly fixed to an inner surface of the yoke and circumferentially spaced from each other by a first gap; a rotor inserted inside the permanent magnets at a second gap radially; an outer frame portion that accommodates the stator and the rotor; a ventilation hole formed in the outer frame portion to place the first and second gaps in communication with an atmosphere; and a dustproof member comprising a ferromagnetic material, which is mounted in contact with the stator and has a protruding portion located in a passage going from the first and second gaps to the atmosphere via the ventilation hole.
    Type: Application
    Filed: March 8, 2005
    Publication date: September 15, 2005
    Applicant: Hitachi Koki Co., Ltd.
    Inventors: Katsuhiro Oomori, Atsushi Nakagawa, Yasuyuki Ooe