Patent ID: 6050431
Filing Date: 2000-04-18
Classification: G05G,Y10T

Abstract:
In a dual control unit including a first control unit and a second control unit structured and arranged to be positioned on opposite sides of a vehicular crane, said first and said second control unit each structured and arranged to include a plurality of manually actuable control elements wherein a control element of the first control unit will form a pair of control elements with a respective control element of the second control unit for mutual actuation of a respective crane element, said first and second control units comprising respective first and second casings structured and arranged to house respective control elements therein and to be movable to a closed position to protect the control elements therein and to be movable to an open position to provide access to the control elements therein, wherein the improvement comprises,said first casing comprising a first locking element and said second casing comprising a second locking element, said first and second locking elements each being movable between a locked position for locking said first and second casing, respectively, and an unlocked position for unlocking said first and second casing, respectively, means for positioning said first and second locking elements in an unlocked position when said first and second casings are each positioned in a closed position, and means for moving one of (a) said first locking element to a locked position when said second casing is moved to an open position and (b) said second locking element to a locked position when said first casing is moved to an open position.