Patents by Inventor Alfred Zwick

Alfred Zwick 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 and device for machining workpieces by means of a laser beam
    Patent number: 5376770
    Abstract: A process for precision control of a laser beam for machining workpieces while achieving high surface quality. The actual distance between a reference location and the workpiece surface is determined. A setpoint/actual value deviation between a predetermined setpoint distance and the actual distance measured is also determined. Control parameters are determined by a control unit in accordance with the setpoint/actual value deviation. The resulting control parameter outputs are coupled to a laser control unit to control the beam power of the laser. The disclosure also includes the apparatus for accomplishing the process.
    Type: Grant
    Filed: January 13, 1993
    Date of Patent: December 27, 1994
    Assignee: MAHO Aktiengesellschaft
    Inventors: Michael Kuhl, Alfred Zwick, Gunter Eberl