Patents by Inventor Heinz Hefendehl

Heinz Hefendehl 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).

  • Patent number: 4640115
    Abstract: In order to increase output of pipe straightening devices, there is provided a driving unit between a preparatory station for the pipes and a feeding station which advances the pipes from the preparatory station in axial direction one after the other in the feeding station. The feeding station includes a succession of rotation symmetrical guiding elements supported for rotation about axes which extend parallel to the feeding path for the pipes. The guiding bodies prevent striking of unbalanced pipes against the feeding unit and permit axial feeding of the pipes in a straightening station.
    Type: Grant
    Filed: July 3, 1985
    Date of Patent: February 3, 1987
    Assignee: Benteler-Werke AG
    Inventors: Franz-Josef Hartmann, Heinz Hefendehl