Patents by Inventor Ralf-Gunter Graeser

Ralf-Gunter Graeser 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: 6345213
    Abstract: A method provides an exact measurement of the tool center point (TCP) being carried out, preferably in the whole working area of the robot. In this measurement, the robot moves very slowly so that little heat is generated by the driving assemblies and the temperature gradients are as low as possible. The measurement can be made, for example, using a high-precision laser distance and angle measurement system. The measurement is carried out such that a measuring point is moved to working area points and then the deviations of the positions and/or orientations of the measuring point are determined using the laser distance and angle measurement system, i.e. a nominal/actual comparison is made. The TCP can preferably serve as the measuring point. The point must always be selected so that the positioning and orientation deviations of the kinematic chain with respect to the PCT can be determined with sufficient accuracy.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: February 5, 2002
    Assignee: Institut fuer Werkzeugmaschinen und Betriebswissenschaften TU Muenchen
    Inventors: Ralf-Gunter Graeser, Robert Klingel