Patents by Inventor Tertada Kojima

Tertada Kojima 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).

  • Fuel injection valve having different fuel injection angles at different opening amounts
    Patent number: 5163621
    Abstract: A fuel injection valve of a diesel engine, comprising a valve body including a concave conical surface in the tip portion of the valve body, and fuel injection holes extending from the concave surface to the outside of the valve body, and a needle valve movable in the valve body and including a cylindrical shaft portion, a first conical surface adjacent to the shaft portion and having a conical angle smaller than that of the concave surface, the lower edge of the first conical surface defining a contact line separably contacting with the concave surface, a second conical surface adjacent to the first surface and having a conical angle substantially equal to that of the concave surface, a third conical surface adjacent to the second surface and having a conical angle greater than that of the concave surface.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: November 17, 1992
    Assignee: Nippondenso Co., Ltd.
    Inventors: Masaaki Kato, Hiroyuki Kano, Masahiro Okajima, Yoshihiro Narahara, Tertada Kojima, Shigeki Tojo