Patents by Inventor Shizuo Sumi

Shizuo Sumi 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).

  • Fuel injection pump assembly for diesel engine
    Patent number: 4127366
    Abstract: A pump housing has an upwardly opening cylindrical bore and the bottom of the housing is blinded. Pump elements, such as a tappet and upper and lower spring seats, are slidably disposed in the cylindrical bore, wherein each of the outer diameter of the pump elements is made smaller than the inner diameter of the cylindrical bore, so that those pump elements can be assembled in place in the bore from the top of the pump housing.
    Type: Grant
    Filed: March 24, 1977
    Date of Patent: November 28, 1978
    Assignee: Nippondenso Co., Ltd.
    Inventor: Shizuo Sumi