Patents by Inventor Kentaroh Taka

Kentaroh Taka 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).

  • Portable power tool having internal combustion engine
    Patent number: 6640764
    Abstract: A portable power tool includes an internal combustion engine that includes a crankshaft in which a load applied thereto is unevenly distributed along the axis of the crankshaft with respect to the axis of the reciprocating movement of a piston. The portable power tool also includes operational members that are driven by the internal combustion engine, a rotational body fixed to an end of the crankshaft to which a smaller component of the load is applied, and a balancing weight provided on the rotational body for absorbing vibrations generated by the reciprocating movement of the piston. The centroid of the balancing weight is disposed at an angular position from 140 degrees to 180 degrees with respect to the axis of the reciprocating movement of the piston in a rotational direction of the rotational body, when the piston is positioned at a top dead center.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: November 4, 2003
    Assignee: Kioritz Corp.
    Inventors: Fuminori Tezuka, Tadashi Kamoshita, Masanori Ohtani, Kentaroh Taka
  • Portable power tool having internal combustion engine
    Publication number: 20030019460
    Abstract: A portable power tool includes an internal combustion engine that includes a crankshaft in which a load applied thereto is unevenly distributed along the axis of the crankshaft with respect to the axis of the reciprocating movement of a piston. The portable power tool also includes operational members that are driven by the internal combustion engine, a rotational body fixed to an end of the crankshaft to which a smaller component of the load is applied, and a balancing weight provided on the rotational body for absorbing vibrations generated by the reciprocating movement of the piston. The centroid of the balancing weight is disposed at an angular position from 140 degrees to 180 degrees with respect to the axis of the reciprocating movement of the piston in a rotational direction of the rotational body, when the piston is positioned at a top dead center.
    Type: Application
    Filed: July 22, 2002
    Publication date: January 30, 2003
    Inventors: Fuminori Tezuka, Tadashi Kamoshita, Masanori Ohtani, Kentaroh Taka