Patents by Inventor Eishi Matsumoto

Eishi Matsumoto 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
    Patent number: 7434752
    Abstract: A fuel injection valve is provided that includes a valve seat member (3) having provided therein a conical valve seat (8) and a valve seat hole (7) communicating with the downstream end of the valve seat (8), a flat fuel diffusion chamber (43) radially extending from the valve seat hole (7), the fuel diffusion chamber (43) being formed between the valve seat member (3) and an injector plate (10), and a plurality of fuel injection holes (11) bored in the injector plate (10) so as to open in the fuel diffusion chamber (43), wherein the fuel injection holes (11) are arranged so as to be radially outwardly separated from the valve seat hole (7), and when the height of the fuel diffusion chamber (43) is t1 and the length of the valve seat hole (7) is t2, t2/t1?2.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: October 14, 2008
    Assignee: Keihin Corporation
    Inventors: Eishi Matsumoto, Koji Kitamura, Gaku Sato
  • Fuel Injection Valve
    Publication number: 20070262176
    Abstract: A fuel injection valve is provided that includes a valve seat member (3) having provided therein a conical valve seat (8) and a valve seat hole (7) communicating with the downstream end of the valve seat (8), a flat fuel diffusion chamber (43) radially extending from the valve seat hole (7), the fuel diffusion chamber (43) being formed between the valve seat member (3) and an injector plate (10), and a plurality of fuel injection holes (11) bored in the injector plate (10) so as to open in the fuel diffusion chamber (43), wherein the fuel injection holes (11) are arranged so as to be radially outwardly separated from the valve seat hole (7), and when the height of the fuel diffusion chamber (43) is t1 and the length of the valve seat hole (7) is t2, t2/t1?2.
    Type: Application
    Filed: October 5, 2004
    Publication date: November 15, 2007
    Inventors: Eishi Matsumoto, Koji Kitamura, Gaku Sato