Patents by Inventor Ottmar Koeppel

Ottmar Koeppel 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: 5134779
    Abstract: A plotter having a flat-bed, a beam-shaped tool carriage having opposite ends and movable in a first coordinate direction, work stands located at each end of the tool carriage, a tool holder movable on the tool carriage in a second coordinate direction orthogonal to the first coordinate direction, controlled drive motors for the two travel movements is provided with a drive connection from the drive motor for the first coordinate direction to the tool carriage, said drive connection being provided from muliple cable strands each comprising at least four individual cables guided in parallel. The individual cables loop around drive pulleys to secure the tool carriage tightly in each work stand. Rockers pivotally mounted on each word stand and containing reverse rollers through individual cables pass through, equalize the tensile stresses of the individual cables. This results in an improved repeat accuracy of the positioning of the plotter tool.
    Type: Grant
    Filed: January 25, 1990
    Date of Patent: August 4, 1992
    Assignee: Wild Leitz AG
    Inventors: Franz Sprenger, Ottmar Koeppel