Patents by Inventor Naoshi Hirota

Naoshi Hirota 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 and apparatus for automatically detecting gas leak, and recording medium for leak detection
    Patent number: 6167749
    Abstract: A method of the present invention automatically detects gas leak from a valve on a gas-containing vessel, or the like, based on detected absolute pressure and pressure fluctuation. The method can detect both fine leak and gross leak. The method comprises a method for automatically detecting gas leak from a target object provided on gas piping comprising the steps of: issuing command for forming an airtight room communicating with said target object; issuing command for pressurizing said airtight room until a predetermined pressure; detecting absolute pressure and pressure fluctuation of said airtight room, measured with a gauge; and discriminating whether gas leaks from said target object or not based on the detected absolute pressure and pressure fluctuation.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: January 2, 2001
    Assignee: Yamaha Corporation
    Inventors: Takahiro Yanagisawa, Naoshi Hirota