Patents by Inventor Jörg Wolfgramm

Jörg Wolfgramm 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).

  • Device for grinding an end face, especially an annular surface at the edge of a workpiece bore
    Patent number: 6267653
    Abstract: A device for grinding an end face at an edge of a workpiece bore of a workpiece has a driven grinding tool and a guide pin, connected to the grinding tool, for insertion into the workpiece. The guide pin is dimensioned so as to precisely match the workpiece bore. The guide pin has a central axis. The grinding tool has a grinding surface extending angularly to the central axis. The grinding tool is periodically displaceable transverse to the central axis.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: July 31, 2001
    Assignees: Maschinenfabrik Gehring GmbH & Co., Robert Bosch GmbH
    Inventors: Ulrich Klink, Richard Stampfer, Hermann Schmidt, Dieter Aulich, Jörg Wolfgramm