Patents by Inventor Makoto Yamaguti

Makoto Yamaguti 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).

  • Leakage measurement method and apparatus using the same
    Patent number: 5834631
    Abstract: According to the present invention, a leakage measurement apparatus includes a volume metering device having a diaphragm which is displaced in accordance with a change in volume of the measurement medium leaked from an object and transmitted to the diaphragm. The volume of the leakage is calculated based on the change of the displaced amount of the diaphragm. In this way, the amount of leakage can be measured directly from the change in volume of the measurement medium. Further, the volume of the leakage can be measured without being affected by a change in pressure, and the accuracy of measurement can be improved.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: November 10, 1998
    Assignee: Denso Corporation
    Inventors: Makoto Yamaguti, Masahiro Matsuyama