Patents by Inventor Syunichiro Hiromasa

Syunichiro Hiromasa 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).

  • Gas flow measuring apparatus
    Patent number: 4399698
    Abstract: A gas flow measuring apparatus is provided with an air flow sensor mounted in a suction duct upstream from a throttle valve and exposed to the air flow through the suction duct. The air flow sensor includes a ceramic flat plate mounted in the suction duct so that the main surfaces of the ceramic flat plate are parallel with the air flow. First and second temperature-dependent resistor coatings are formed on the main surfaces of the ceramic flat plate so that the first resistor coating and the second resistor coating are respectively formed on the downstream and upstream end portions of the ceramic flat plate by printing or evaporating a platinum. An electric heater coating is formed between the first and second resistor coatings but spaced therefrom to affect only the first resistor coating, and the heater coating is also formed by printing or evaporating a platinum.
    Type: Grant
    Filed: May 15, 1981
    Date of Patent: August 23, 1983
    Assignee: Nippondenso Co., Ltd.
    Inventors: Syunichiro Hiromasa, Norio Omori, Yutaka Kawashima, Yukio Muto