Patents by Inventor Akimitsu Takeuchi

Akimitsu Takeuchi 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).

  • Engine with a balancer mechanism
    Patent number: 8220431
    Abstract: An engine includes a crank mechanism and a balancer mechanism that inhibits vibrations caused by the crank mechanism. An instantaneous center of rotation of an engine is arranged in the neighborhood of a predetermined target position by adjusting an acceleration caused by a translational force generated by a primary inertial force of the crank mechanism and an inertial force of the balancer mechanism and an acceleration caused by a couple of forces generated by the primary inertial force of the crank mechanism and the inertial force of the balancer mechanism.
    Type: Grant
    Filed: July 4, 2005
    Date of Patent: July 17, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Naoki Okamoto, Kazuhiro Ohta, Taketoshi Sano, Akimitsu Takeuchi
  • ENGINE WITH A BALANCER MECHANISM
    Publication number: 20090211550
    Abstract: There are provided a crank mechanism, and a balancer mechanism that inhibits vibrations caused by the crank mechanism, and an instantaneous center of rotation of an engine is arranged in the neighborhood of a predetermined target position by adjusting an acceleration caused by a translational force generated by a primary inertial force of the crank mechanism and an inertial force of the balancer mechanism and an acceleration caused by a couple of forces generated by the primary inertial force of the crank mechanism and the inertial force of the balancer mechanism.
    Type: Application
    Filed: July 4, 2005
    Publication date: August 27, 2009
    Inventors: Naoki Okamoto, Kazuhiro Ohta, Taketoshi Sano, Akimitsu Takeuchi