Patents by Inventor Hellmut Wallbaum

Hellmut Wallbaum 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).

  • Speed control apparatus for an internal combustion engine
    Patent number: 4084559
    Abstract: Speed control apparatus for an internal combustion engine comprises a throttle valve in an intake pipe of the engine, a throttle adjusting element for actuating the throttle valve, and a speed control regulator connected to the throttle adjusting element. The regulator produces a signal representative of the difference between the actual value and a desired value of engine speed and the throttle adjusting element actuates the throttle valve in dependence upon this signal when the engine is not idling. Means are provided for moving the throttle valve into its idling position when the voltage supplied to the speed control regulator is interrupted.
    Type: Grant
    Filed: October 14, 1976
    Date of Patent: April 18, 1978
    Assignee: Volkswagenwerk Aktiengesellschaft
    Inventor: Hellmut Wallbaum