Patents by Inventor Yoichi Imagawa

Yoichi Imagawa 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 for portable working machine
    Patent number: 5263454
    Abstract: An engine for a portable working machine includes a carburetor having a fuel supply device which is to be operated by an intake pipe of a cylinder head provided with an intake valve and an exhaust valve, and a pulse pickup passage which is in fluid communication with the carburetor and which is connected to an inner wall of the intake pipe. The passage is provided at a connection portion between the intake pipe and the carburetor.
    Type: Grant
    Filed: August 18, 1992
    Date of Patent: November 23, 1993
    Assignee: Ryobi Limited
    Inventor: Yoichi Imagawa