Patents by Inventor Donald K. Graham

Donald K. Graham 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 mixer
    Patent number: 4149562
    Abstract: A gaseous fuel mixer for an internal combustion engine includes hinged air valve doors arranged for opening in accordance with manifold depression, the doors are linked to the fuel metering means and include means for ducting the gaseous fuel into the air stream. The air valve doors can be hinged flat along a surface of the air inlet to permit alternate use of a conventional gasoline carburetor.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: April 17, 1979
    Assignee: Borg-Warner Corporation
    Inventors: Roy H. Johnson, Donald K. Graham
  • Fuel mixer
    Patent number: 4063905
    Abstract: A gaseous fuel mixer for an internal combustion engine includes hinged air valve doors arranged for opening in accordance with manifold depression, the doors are linked to the fuel metering means and include means for ducting the gaseous fuel into the air stream. The air valve doors can be hinged flat along a surface of the air inlet to permit alternate use of a conventional gasoline carburetor.
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: December 20, 1977
    Assignee: Borg-Warner Corporation
    Inventors: Roy Henry Johnson, Donald K. Graham