Patents by Inventor Minoru Shimooka

Minoru Shimooka 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).

  • Exhaust gas flow measuring equipment for internal combustion engines and processes for calibrating sensitivity of trace gas flow meters
    Patent number: 6176125
    Abstract: An exhaust gas flow rate measuring equipment for internal combustion engines supplies helium gas only to a trace gas analyzer. The condition in which the inside of the trace gas analyzer in the high-vacuum stage causes pressure fluctuation due to the viscosity of the exhaust gas and the introduction rate of helium gas fluctuates in proportion to the fluctuation rate can be prevented. Also the, problem of the sensitivity varying in accordance with the gas component ratio in the exhaust gas can be solved.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: January 23, 2001
    Assignee: Horiba, Ltd.
    Inventors: Takashi Hirano, Masayuki Adachi, Minoru Shimooka, Kazuki Makimura