Patents by Inventor August Duffner

August Duffner 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).

  • Boring and deburring head and boring and deburring tool capable of being fastened therein, and method for boring and deburring a workpiece
    Patent number: 4589805
    Abstract: The boring and milling head (11) is designed to receive a boring and mill tool (91) provided with a clamping device (55) having a hollow clamping cone (57) and a conical clamping wedge (61), the device being connected in order to resist torsion, to a drive element (21) which may be coupled with a rotary driven boring bar or with another similar mounting. In order to perform a boring and milling in a single operation with the overmentioned boring and milling head (11), without having to change the tool and/or the position of the boring bar or of the work piece, the longitudinal axis of the clamping device (55) containing the boring and milling tool (91) may pivot with respect to the rotation axis (88) of the drive element (21).
    Type: Grant
    Filed: May 15, 1984
    Date of Patent: May 20, 1986
    Assignee: Kadia-Diamant Maschinen- und Werkzeugfabrik O. Kopp GmbH & Co.
    Inventor: August Duffner