Patents by Inventor Keizo Otake

Keizo Otake 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).

  • Device and method for detecting unbalanced condition in a load driven by a motor
    Patent number: 5677606
    Abstract: A method and device for detecting an out-of-balance condition of a load which is driven by a motor is disclosed. A present instantaneous value of a current of a motor which is driving a load is detected and an average value of the detected instantaneous value over time is established. The present instantaneous value is compared to the established average value, and the number of times which the instantaneous value differs from the average value by at least a prescribed amount is counted. If this number exceeds a certain number, it is determined that the load which the motor is driving is out of balance.
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: October 14, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Keizo Otake