Patents by Inventor Jean-Bernard Wittner

Jean-Bernard Wittner 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 affixing cutter drums to an apparatus intended for cutting trenches in the ground
    Patent number: 4991322
    Abstract: The invention relates to a device for affixing cutter drums on an apparatus designed to cut trenches in the ground.The driver includes a revolving plate 4 disposed perpendicular to its axis and to the end of the latter, the plate having on its periphery a convex polygonal shape 9. A cutter drum 8 is provided with a portion 8a including a central hollow of concave polygonal shape 10 corresponding to the convex polygonal shape 9 of the plate 4 and of slightly greater dimensions. Bolts 11 unite the cutter drum 8 to the said plate 4 such that the rotational driving of the cutter drum 8 by the plate is performed through the medium of the aforesaid polygonal surfaces 9, 10 which come into engagement with one another.
    Type: Grant
    Filed: January 12, 1990
    Date of Patent: February 12, 1991
    Assignee: Soletanche
    Inventors: Jean-Claude Detilleux, Gilbert Ferre, Philippe LeFort, Andre Ponsada, Jean-Pierre Schreiber, Jean-Bernard Wittner