Hydraulically operated bridge crane

Details Hydraulically operated bridge crane Hydraulically operated bridge crane

1986-12-15

1988-03-15

Peters, Jr., Joseph F.

Traversing hoists

Having boom shiftable vertically along a linear path

Length of hoisting cable between boom and load decreases...

92134, 212162, B66C 1700

Patent

active

047307439

ABSTRACT:
A bridge-crane structure wherein major structural components to sustain loads imposed upon the span are also major functional components of hydraulically controlled hoist mechanism of the crane. Specifically, closed upper and lower elongate cylinders are rigidly laced by struts to define a bridge girder, of length corresponding to the length of the bridge; and these cylinders are charged with gas at elevated pressure and interconnected as major components of a hydraulic accumulator relied upon as a phantom counterweight in the hydraulic hoist mechanism.

REFERENCES:
patent: 1866801 (1932-07-01), Ferris
patent: 2940608 (1960-06-01), Underwood et al.
patent: 3294252 (1966-12-01), Hosoi et al.
patent: 3973679 (1976-08-01), Hass et al.
patent: 4098082 (1978-07-01), Packer

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