A lifting device may include a level setting portion and an adjustable beam assembly pivotally secured to the level setting portion and including a structural beam portion and an adjustment portion configured for translating along the structural beam portion, where the adjustable beam assembly includes a sensor for sensing when the structural beam portion is unbalanced and an actuation system for translating the adjustment portion to bring the structural beam portion into a balanced condition.
SELF-BALANCING SPREADER BEAM
2015-10-29
Patent
Electronic Resource
English
IPC: | B66C Krane , CRANES |