Patents by Inventor Hiroyuki Kotou

Hiroyuki Kotou 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).

  • Heat exchanger and method of making it
    Publication number: 20030019618
    Abstract: A heat exchanger is constructed by tubes, corrugated fins and head pipes, which are assembled together. Herein, the tube is constructed by bending a flat plate whose surfaces are clad with brazing material to form a first wall and a second wall, which are arranged opposite to each other with a prescribed interval of distance therebetween to provide a refrigerant passage. Before bending, a number of swelling portions are formed to swell from an interior surface of the flat plate by press. By bending, the swelling portions are correspondingly paired in elevation between the first and second walls, so their top portions are brought into contact with each other to form columns each having a prescribed sectional shape corresponding to an elliptical shape or an elongated circular shape each defined by a short length and a long length.
    Type: Application
    Filed: August 1, 2002
    Publication date: January 30, 2003
    Applicant: MITSUBISHI HEAVY INDUSTRIES LTD.
    Inventors: Yoshinori Watanabe, Akira Yoshikoshi, Atsushi Suzuki, Kiyoto Yasui, Hiroshi Iokawa, Hiroyuki Kotou, Shin Watabe, Masashi Inoue, Koji Nakado
  • Heat exchanger
    Patent number: 6453989
    Abstract: A heat exchanger is constructed by tubes, corrugated fins and head pipes, which are assembled together. Herein, the tube is constructed by bending a flat plate whose surfaces are clad with brazing material to form a first wall and a second wall, which are arranged opposite to each other with a prescribed interval of distance therebetween to provide a refrigerant passage. Before bending, a number of swelling portions are formed to swell from an interior surface of the flat plate by press. By bending, the swelling portions are correspondingly paired in elevation between the first and second walls, so their top portions are brought into contact with each other to form columns each having a prescribed sectional shape corresponding to an elliptical shape or an elongated circular shape each defined by a short length and a long length.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: September 24, 2002
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yoshinori Watanabe, Akira Yoshikoshi, Atsushi Suzuki, Kiyoto Yasui, Hiroshi Iokawa, Hiroyuki Kotou, Shin Watabe, Masashi Inoue, Koji Nakado