Patents by Inventor Toshimitsu MIYAO

Toshimitsu MIYAO 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).

  • Oil vibration diagnosis apparatus and oil vibration diagnosis method
    Patent number: 10724896
    Abstract: First, the pressure of oil within an oil passage in a control valve device is measured. Then, an amplitude and period of pressure fluctuations are detected on the basis of an obtained measurement result, and an oil vibration state or an oil non-vibration state is diagnosed. In this case, when the amplitude is greater than a reference amplitude value and when the period is less than a reference period value, the oil vibration state is diagnosed. Further, a duration time of the oil vibration state is determined on the basis of a diagnostic result. Then, when the oil vibration state continues for a period greater than or equal to a reference time, warning information is output. In this way, warning information is output stepwise in accordance with occurrence or continuation of oil vibration.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: July 28, 2020
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Yoshihisa Sugimoto, Motohiro Sumiyoshi, Toshimitsu Miyao
  • OIL VIBRATION DIAGNOSIS APPARATUS AND OIL VIBRATION DIAGNOSIS METHOD
    Publication number: 20180321079
    Abstract: First, the pressure of oil within an oil passage in a control valve device is measured. Then, an amplitude and period of pressure fluctuations are detected on the basis of an obtained measurement result, and an oil vibration state or an oil non-vibration state is diagnosed. In this case, when the amplitude is greater than a reference amplitude value and when the period is less than a reference period value, the oil vibration state is diagnosed. Further, a duration time of the oil vibration state is determined on the basis of a diagnostic result. Then, when the oil vibration state continues for a period greater than or equal to a reference time, warning information is output. In this way, warning information is output stepwise in accordance with occurrence or continuation of oil vibration.
    Type: Application
    Filed: October 14, 2016
    Publication date: November 8, 2018
    Inventors: Yoshihisa SUGIMOTO, Motohiro SUMIYOSHI, Toshimitsu MIYAO