Patents by Inventor Franz-Joachim Helfrich

Franz-Joachim Helfrich 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).

  • Articulated link for the connection of two ends of the track of a tracked vehicle
    Patent number: 4775198
    Abstract: An articulated element of a track comprising two parallel faces consisting of two superimposed parts with holes for articulation bolts. The contact sides of the articulation parts have teeth which mesh with one another and move parallel to the pivoting plane. To lengthen the articulation element, the teeth move transversely and are undercut in such a way that under the effect of a tractional force they bring together the parts of the faces of the articulation elements. To facilitate the manufacture of this articulation element and to reduce its cost, the flanks (9,10) of the teeth (5) and the toothspaces (1) are straight over the whole of their length and end freely on their longitudinal side (7 and 8).
    Type: Grant
    Filed: March 3, 1987
    Date of Patent: October 4, 1988
    Assignee: Intertractor Viehmann GmgH & Co.
    Inventors: Theobald Bokamp, Franz-Joachim Helfrich