Patents by Inventor Yasuo Itimura

Yasuo Itimura 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).

  • Method for discriminating abnormal current including arc current in AC load circuit and apparatus for executing the same
    Patent number: 6703842
    Abstract: An abnormal current discriminating method including an arc current detecting method and the apparatus for performing the same in which the arc current method includes the steps of: extracting a predetermined transition pattern specified by the combination of fluctuation patterns of peak values of three continuous half waves from the peak value for each half wave detected from an alternating current flowing to the AC load circuit which is sampled in a predetermined cycle and converted into a digital value, counting the number of appearances of the predetermined transition pattern, and comparing the count value with a predetermined threshold.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: March 9, 2004
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Yasuo Itimura, Akimi Shiokawa, Yoichi Kunimoto
  • Method for discriminating abnormal current including arc current in AC load circuit and apparatus for executing the same
    Publication number: 20030137309
    Abstract: An abnormal current discriminating method including an arc current detecting method and the apparatus for performing the same in which the arc current method includes the steps of: extracting a predetermined transition pattern specified by the combination of fluctuation patterns of peak values of three continuous half waves from the peak value for each half wave detected from an alternating current flowing to the AC load circuit which is sampled in a predetermined cycle and converted into a digital value, counting the number of appearances of the predetermined transition pattern, and comparing the count value with a predetermined threshold.
    Type: Application
    Filed: January 24, 2002
    Publication date: July 24, 2003
    Inventors: Yasuo Itimura, Akimi Shiokaw, Yoichi Kunimoto