Patents by Inventor Takeshi Matsumaru

Takeshi Matsumaru 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).

  • Method for adjusting stroke of fuel injection valve, and fuel injection valve
    Patent number: 9429128
    Abstract: An objection of the present invention is to provide a fuel injection valve with a reduced variation in an injection amount and, in order to achieve this object, a method for adjusting stroke, the method being able to correct change in an amount of stroke caused by welding. In the method for adjusting the amount of stroke of a movable member of a fuel injection valve including a nozzle member having a seat face, a nozzle holder member to which the nozzle member is joined by welding, and the movable member having a valve seat portion for coming in contact with the seat face, the amount of stroke of the movable member is adjusted by plastically deforming a deformable portion provided to the nozzle holder member after joining the nozzle member and the nozzle holder member by welding.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: August 30, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kenichi Gunji, Shin Onose, Takeshi Matsumaru, Katsuya Oonuki, Makoto Matsutate
  • METHOD FOR ADJUSTING STROKE OF FUEL INJECTION VALVE, AND FUEL INJECTION VALVE
    Publication number: 20140076284
    Abstract: An objection of the present invention is to provide a fuel injection valve with a reduced variation in an injection amount and, in order to achieve this object, a method for adjusting stroke, the method being able to correct change in an amount of stroke caused by welding. In the method for adjusting the amount of stroke of a movable member of a fuel injection valve including a nozzle member having a seat face, a nozzle holder member to which the nozzle member is joined by welding, and the movable member having a valve seat portion for coming in contact with the seat face, the amount of stroke of the movable member is adjusted by plastically deforming a deformable portion provided to the nozzle holder member after joining the nozzle member and the nozzle holder member by welding.
    Type: Application
    Filed: April 20, 2012
    Publication date: March 20, 2014
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Kenichi Gunji, Shin Onose, Takeshi Matsumaru, Katsuya Oonuki, Makoto Matsutate