Patents by Inventor Duncan Keller

Duncan Keller 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).

  • Anti-back-streaming carburetor valve
    Publication number: 20060196470
    Abstract: A valve for sealing a carburetor inlet of a first diameter, includes a valve element having a curved surface for sealing the inlet opening, and a through hole of substantially the first diameter extending through the valve element, and a translation mechanism for rotating the valve element between a first position wherein the curved surface completely seals the opening and a second position wherein the through hole aligns with the inlet allowing a free flow into the carburetor.
    Type: Application
    Filed: March 3, 2006
    Publication date: September 7, 2006
    Inventors: Duncan Keller, Arthur Langlie