Patents by Inventor Ralf R. Grabow

Ralf R. Grabow 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).

  • Control membrane for a carburetor
    Patent number: 4978478
    Abstract: The invention is directed to a control membrane of a carburetor including a carburetor chamber containing fuel. The control membrane defines a wall of this chamber and has a reinforcement portion in the center region thereof. This reinforcement portion transmits the membrane stroke to a controller lever. The control membrane provides for a simpler manufacture thereof and achieves a better functional reliability. The control membrane together with the reinforcement portion are configured as a one-piece component.
    Type: Grant
    Filed: August 11, 1989
    Date of Patent: December 18, 1990
    Assignee: Andreas Stihl
    Inventors: Werner Vonderau, Ralf R. Grabow