Crane with foldable boom

Details Crane with foldable boom Crane with foldable boom

1975-07-25

1977-05-24

Oresky, Lawrence J.

Traversing hoists

With haul-in line

212 59R, B66C 2362

Patent

active

040249573

ABSTRACT:
A carrier-mounted crane is provided with inner and outer boom sections which are securable together at upper and lower connections. When the outer boom is to be pivotally folded beneath the inner boom, the lower connection comprises a folding compound arm extending between the boom sections and pivotable intermediate its ends. When the upper boom connection is released and the outer boom folded under, its main pivot connection to the compound arm shifts longitudinally away from the inner boom section, thus effectively moving the outer boom away from the carrier. The tip or outer end of the folded outer boom will thereby remain free of interference with the carrier elements.

REFERENCES:
patent: 2176731 (1939-10-01), Claire
patent: 2689656 (1954-09-01), Przybylski
patent: 3034660 (1962-05-01), Rau et al.

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