Patents Represented by Attorney Michael I. Bak-Boychuk
  • Patent number: 4905848
    Abstract: A control arrangement for a multiple hoist suspension system in which a count is maintained for the pulley turns on each hoist. When the pulley counts approach within a selected deadband, the desired end location the controls are then left open loop and the suspended article is free to drift by inertia. Several such end locations may be stringed together with the resulting alignment sequence determined by the deadband. In consequence closed loop servo dynamics are avoided and the forces are self-resolved within the width of the deadband.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: March 6, 1990
    Inventor: Knut B. Skjonberg