Method of temporarily increasing the load capacity of a powered

Details Method of temporarily increasing the load capacity of a powered Method of temporarily increasing the load capacity of a powered

1976-05-13

1979-03-20

Makay, Albert J.

Traversing hoists

Overhead

Cable

254188, B66C 1700

Patent

active

041449746

ABSTRACT:
A convertible crane is provided with a main trolley which carries a powered hoist along a horizontal path. A trailer trolley also carries a hoist which is powered from the main trolley. Each of the hoists thus have a powered drum which will increase the total line capacity of the crane allowing the crane to be used for temporary longer load travel or higher capacity lifting depending upon the amount of reeving or parts of line used to support the load from the trolleys.

REFERENCES:
patent: 1896274 (1933-02-01), Ball
patent: 2271426 (1942-01-01), Harry
patent: 2802638 (1957-08-01), Ireland
patent: 3321185 (1967-05-01), Zenke
patent: 3854592 (1974-12-01), Mordre
patent: 3984084 (1976-10-01), Boczek

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