Patents by Inventor Takehisa Handa

Takehisa Handa 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).

  • Automatic tappet clearance adjusting device
    Patent number: 7578276
    Abstract: An automatic tappet clearance adjusting device, comprising an adjusting unit adjusting the projected amount of a rocker arm by advancing and retreating an adjust screw to and from the tip of the rocker arm, a pressure setting part electrically controlling the pressure of an air supply source part based on the measurement signals of a primary side pressure sensor measuring the pressure of the air supply source part so that the pressure becomes a specified one, a supply pipeline allowing the air supply source part to communicate with a combustion chamber through a variable orifice, and a control mechanism part controlling the adjusting unit based on measurement signals of a secondary side pressure sensor measuring the pressure of the supply pipeline. The pressure is set to 1.5 kPa by the pressure setting part and the variable orifice.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: August 25, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Junichi Matsuura, Takehisa Handa, Tomoaki Tsuyoshi
  • Automatic Tappet Clearance Adjusting Device
    Publication number: 20080022956
    Abstract: An automatic tappet clearance adjusting device, comprising an adjusting unit adjusting the projected amount of a rocker arm by advancing and retreating an adjust screw to and from the tip of the rocker arm, a pressure setting part electrically controlling the pressure of an air supply source part based on the measurement signals of a primary side pressure sensor measuring the pressure of the air supply source part so that the pressure becomes a specified one, a supply pipeline allowing the air supply source part to communicate with a combustion chamber through a variable orifice, and a control mechanism part controlling the adjusting unit based on measurement signals of a secondary side pressure sensor measuring the pressure of the supply pipeline. The pressure is set to 1.5 kPa by the pressure setting part and the variable orifice.
    Type: Application
    Filed: September 28, 2005
    Publication date: January 31, 2008
    Applicant: Honda Motor Co,. Ltd.
    Inventors: Junichi Matsuura, Takehisa Handa, Tomoaki Tsuyoshi