Patents by Inventor Jun Arimoto

Jun Arimoto 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 nozzle for a diesel engine
    Patent number: 6776358
    Abstract: A fuel injection nozzle is provided for a diesel engine. The fuel injection nozzle includes a nozzle body having a tip end portion, a top end portion having an opening edge, and a fuel inlet passage, a needle valve inserted in the nozzle body, and a bag-shaped rotary valve fitted with the tip end portion of the needle valve. The nozzle body has a first protrusion protruding from an inner peripheral surface toward a center axis of the nozzle body. The needle valve has a first guide groove being engaged with the first protrusion and a second guide groove. The rotary valve has a second protrusion protruding toward the center axis and being engaged with the second guide groove. This fuel injection nozzle may realize good combustion performance and good exhaust emission performance. Also the fuel injection nozzle may have a simple structure without increasing the size of the injector assembly.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: August 17, 2004
    Inventor: Jun Arimoto
  • Fuel injection nozzle for a diesel engine
    Publication number: 20020092929
    Abstract: A fuel injection nozzle is provided for a diesel engine. The fuel injection nozzle includes a nozzle body having a tip end portion, a top end portion having an opening edge, and a fuel inlet passage, a needle valve inserted in the nozzle body, and a bag-shaped rotary valve fitted with the tip end portion of the needle valve. The nozzle body has a first protrusion protruding from an inner peripheral surface toward a center axis of the nozzle body. The needle valve has a first guide groove being engaged with the first protrusion and a second guide groove. The rotary valve has a second protrusion protruding toward the center axis and being engaged with the second guide groove. This fuel injection nozzle may realize good combustion performance and good exhaust emission performance. Also the fuel injection nozzle may have a simple structure without increasing the size of the injector assembly.
    Type: Application
    Filed: December 18, 2001
    Publication date: July 18, 2002
    Inventor: Jun Arimoto