Patents by Inventor Naoyoshi Sutoh

Naoyoshi Sutoh 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).

  • Brazing method
    Patent number: 5174490
    Abstract: A method of brazing a temporarily assembled heat exchanger includes the steps of spraying an ionized fluid such as water on one surface. A powdered electrostatically charged flux is blown onto the opposite surface of the heat exchanger. A portion of the powdered flux is attracted to the one surface by the ionized fluid. Therefore, the flux material is uniformly spread across the heat exchanger. Finally, the heat exchanger is heated and brazed.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: December 29, 1992
    Assignee: Sanden Corporation
    Inventors: Mikio Koisuka, Naoyoshi Sutoh, Hisao Aoki