Patents by Inventor Robert Knobel

Robert Knobel 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).

  • Casing for air cooled electric machines
    Patent number: 4786833
    Abstract: The casing of an electric machine has ribs welded onto a casing jacket, the ribs displaying a U-shaped profile. The legs of the ribs can be secured by resistance projection welding to the casing jacket. One rib can be somewhat larger than the other ribs and used as a support for a foot.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: November 22, 1988
    Assignee: Zschokke Wartmann AG
    Inventor: Robert Knobel