Patents by Inventor Karl C. Hoffman

Karl C. Hoffman 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).

  • Tool coupling device
    Patent number: 4725173
    Abstract: The present invention relates to a tool coupling device comprising a coupling element (10) attachable to a machine tool and a tool adapter (11) intended to clamp a tool for chip forming machining. A plug (18) on the adapter (11) is related to a contact surface (30;38) that is intended to be in engagement with a corresponding contact surface (29;37) related to the coupling element (10), said engagement clamping the adapter (11) against the coupling element (10).
    Type: Grant
    Filed: May 7, 1986
    Date of Patent: February 16, 1988
    Assignee: Santrade Limited
    Inventors: Karl C. Hoffman, Ulrich Korner