Patents by Inventor Tadafumi Miyamoto

Tadafumi Miyamoto 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).

  • Four-cycle engine
    Patent number: 6766784
    Abstract: A four-cycle engine fueled by a mixture of fuel and lubricant and including valve actuation mechanism contained in the path of the fuel flow. A component of the mechanism including a rotating gear having a gear shaft journalled between wall portions of the engine whereat the wall portions define in part the flow path of the fuel. Through holes provided in the walls to direct fuel-lubricant to the shaft ends journalled in the wall portions for lubrication of the said shaft ends.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: July 27, 2004
    Assignee: Shindaiwa Kogyo Co., Ltd.
    Inventors: Kenji Imafuku, Hidenori Hiraki, Tadafumi Miyamoto, Yuki Terada
  • Four-cycle engine
    Publication number: 20030037764
    Abstract: A four-cycle engine fueled by a mixture of fuel and lubricant and including valve actuation mechanism contained in the path of the fuel flow. A component of the mechanism including a rotating gear having a gear shaft journalled between wall portions of the engine whereat the wall portions define in part the flow path of the fuel. Through holes provided in the walls to direct fuel-lubricant to the shaft ends journalled in the wall portions for lubrication of said shaft ends.
    Type: Application
    Filed: August 9, 2002
    Publication date: February 27, 2003
    Inventors: Kenji Imafuku, Hidenori Hiraki, Tadafumi Miyamoto, Yuki Terada