Patents by Inventor Hiromu Ogawa

Hiromu Ogawa 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).

  • Immersion type heat exchanger
    Patent number: 5562156
    Abstract: The present invention provides a heat exchanger having a coating with durability which causes neither adhesion of sludge nor separation of the coating within a short time. The surface of the heat exchanger is coated with a fluororesin having excellent chemical resistance and characteristics in that the hardness is R96 or more, the taper abrasion is less than 8.7 mg, the linear expansion coefficient is 7.5 to 8.0.times.10.sup.-5 /.degree.C., and the elongation is 223 to 280%. The fluororesin is preferably poly chloro tri fluoro ethylene with 1-2 weight percent cobalt.
    Type: Grant
    Filed: February 9, 1995
    Date of Patent: October 8, 1996
    Assignee: Ohmiya Corporation
    Inventors: Hiromu Ogawa, Michio Hashida, Kiyoshi Kawasaki