Patents by Inventor Klaus Katzy

Klaus Katzy 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).

  • System for monitoring the operation of a cage moving in a mine shaft
    Patent number: 5070967
    Abstract: A pulse encoder digitally derives a first value of speed at which the cage is moving at any given time. An analog device, such as a tachogenerator, derives the second value of the speed, in analog form, at which the cage is moving at the same time. The two speeds are compared in a comparator to determine the differences therebetween. If the difference exceeds a predetermined limit, an emergency stop is tripped to arrest the motion of the cage.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: December 10, 1991
    Assignee: Asea Brown Boveri Inc.
    Inventors: Klaus Katzy, Bruno Leijon, Damir Kudeljan
  • Mine hoist control method and apparatus
    Patent number: 4761589
    Abstract: A method of controlling a pair of hoist motors comprises delaying one about to raise a load while allowing the other to lower its load until a steady speed is reached, and then raising the load with the first motor. The regenerative current from the motor lowering its load at steady speed is offset against the drive current required for the motor raising its load.
    Type: Grant
    Filed: November 4, 1986
    Date of Patent: August 2, 1988
    Assignee: Crucible Societe Anonyme
    Inventors: Lindo Hauptfleisch, Klaus Katzy