System for a crane boom

Details System for a crane boom System for a crane boom

1976-01-23

1977-02-01

Gruber, Felix D.

Registers

Transfer mechanism

Traveling pawl

340267C, B66C 2390, G06G 770

Patent

active

040063470

ABSTRACT:
A crane boom, pivoted at one end to the chassis or body of the crane, is swung about a horizontal axis by a hydraulic drive mechanism, e.g. a double-acting piston-and-cylinder arrangement. A control system for this boom comprises a device which monitors the instantaneous load moment on the boom and the maximum load moment permissible for the particular position of the boom (as a function of this position) and compares these two parameters in a quotient-forming comparator whose output is applied to a set point adjusting element via a logic circuit or connection device. The set point generating unit forms part of the actuating system for the crane.

REFERENCES:
patent: 3771667 (1973-11-01), Berker et al.
patent: 3841493 (1974-10-01), Jackson et al.
patent: 3854128 (1974-12-01), Yamagishi
patent: 3870160 (1975-03-01), Hutchings

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