Patents by Inventor Manfred Tholl

Manfred Tholl 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).

  • Internal combustion engine of the spark ignition type
    Patent number: 4763622
    Abstract: In an internal combustion engine having two intake valves on one side and two exhaust valves on the other side of each cylinder, all four valves are displaced towards the exhaust valve side to provide room for a squish zone on the intake valve side. The squish zone is formed in such a way that the mixture is directed or "squished" in the direction of the spark plug to provide turbulence for improving combustion, especially during partial load operation.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: August 16, 1988
    Assignee: General Motors Corporation
    Inventors: Friedrich Indra, Manfred Tholl