Separated ring segment dual pivot lift crane

Details Separated ring segment dual pivot lift crane Separated ring segment dual pivot lift crane

1980-03-07

1982-11-09

Saifer, Robert W.

Traversing hoists

Having counterweight or counterbalancing means

B66C 2374

Patent

active

043580211

ABSTRACT:
Front and rear pairs of crawler assemblies are provided for supporting separated ring segments disposed forwardly under the boom and rearwardly under the counterweight so the crane can travel under load and swing through at least a partial horizontal arc with separate pivots for the boom and counterweight. One and preferably both crawler assemblies are selectively and reversely powered to facilitate forward and reverse as well as turning movement during travel under loaded and unloaded conditions.

REFERENCES:
patent: 3836010 (1974-09-01), Lampson
patent: 3930583 (1976-01-01), Jouffray

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