Loading/unloading crane with buoyant counterweight system

Details Loading/unloading crane with buoyant counterweight system Loading/unloading crane with buoyant counterweight system

1976-03-05

1978-02-21

Blix, Trygve M.

Traversing hoists

Overhead

Cable

212 3R, 212 48, 212 56, 212 63, B63B 2700, B66C 2352

Patent

active

040748189

ABSTRACT:
A crane assembly mounted on a buoyant barge has a vertical column with a cross boom, the boom including outer extremities. A trolley is movably mounted on the boom, and has lift means for engagement with articles to be loaded and unloaded. A buoyant counterweight is attached to one of the extremities of the boom by a cable of fixed length, and the other extremity of the boom is secured to the loading and unloading site. The counterweight resists tilt moments on the boom responsive to movement of the weight of the lifted article along the boom, and overturn is prevented in other positions of the article weight by the attachment of the boom to the site.

REFERENCES:
patent: 734974 (1903-07-01), Shoosmith
patent: 3402824 (1968-09-01), Zweifel
patent: 3752326 (1973-08-01), Levingston
patent: 3945508 (1976-03-01), Colin

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