Counterbalanced Hoist System
The counterbalanced hoist system was developed by Bucyrus-Erie (now Bucyrus International) in 1930. By request from Michigan Limestone Co. of Rogers City, Bucyrus-Erie produced the first-ever shovel with a counterbalanced hoist system.
The shovel consisted of a counterweight positioned at the rear of the revolving frame and connected by wire ropes to a dipper hoist drum. The counterweight would balance the weight of the dipper by running vertically in cage by a series of wire ropes, similar to the mechanism of an elevator. This resulted in the hoisting power being deferred to filling the dipper and raising the load.
- ↑ Haddock, Keith. Bucyrus: Making the Earth Move for 125 Years. Motorbooks: 2005.