Patents by Inventor Toshitsugu Ohara

Toshitsugu Ohara 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).

  • Electric motor driven type on-line roll grinder, its control method and grinding method
    Patent number: 5722876
    Abstract: An electric drive motor with a small size and large rotary torque is used as a driving device for a grinding wheel of a grinding device. The motor such as an AC servo motor is encased in a casing to protect it from humidity, high temperature, scattered oil, etc. The atmosphere in the casing is controlled to protect the motor. The pressure, temperature and humidity in the casing are controlled by introducing dried air into the casing.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: March 3, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Shigeru Mori, Toshitsugu Ohara