Patents by Inventor Roland Dangelmaier

Roland Dangelmaier 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).

  • Process for the manufacture of a rack
    Patent number: 4646554
    Abstract: A process for the manufacture of a rack, specially a rack having variable transmission, wherein the teeth of the rack have in the central area a profile different from that of the outer portions. The rack is formed from a blank in a press having an upper die and a lower die. The rack is manufactured by cold-mold pressing and one die portion carries out, during the pressing operations, a wobbling movement over the blank. In an apparatus for carrying out the process, a die forms the negative mold for the lower portion of the rack to be manufactured. In the other die is molded in negative mold the toothed profile of the rack to be manufactured.
    Type: Grant
    Filed: August 2, 1985
    Date of Patent: March 3, 1987
    Assignee: Zahnradfabrik Friedrichshafen AG.
    Inventors: Kurt Wallis, Roland Dangelmaier, Ansgar Betz, Heinrich Schmid