Patents by Inventor Takayuki Motohashi

Takayuki Motohashi 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).

  • Throttling pintle-type fuel injection nozzle having an improved initial injection characteristic
    Patent number: 4524914
    Abstract: A pintle on the tip of the nozzle needle, which is disposed to be fitted through the nozzle hole of the nozzle body opening in a combustion chamber of an engine, has a conical portion. The conical portion extends along substantially the whole length of the nozzle hole when the nozzle needle has its seating portion seated on a valve seating portion of the nozzle body, and has a depth gradually decreasing toward the combustion chamber to define between itself and the nozzle needle an annular gap gradually expanding toward the combustion chamber. A portion of the pintle, which is substantially on a level with an end of the nozzle hole remote from the combustion chamber when the seating portion of the nozzle needle is in its seated position, has a diameter substantially equal to the inner diameter of the above end of the nozzle hole.
    Type: Grant
    Filed: December 29, 1983
    Date of Patent: June 25, 1985
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Nobuhiro Kaibara, Toshio Ida, Shinji Okuda, Takayuki Motohashi