Vehicle cranes

Details Vehicle cranes Vehicle cranes

1975-05-21

1977-01-11

Spar, Robert J.

Traversing hoists

Overhead

Cable

214 75R, 212 58R, B66C 2300

Patent

active

040022420

ABSTRACT:
In vehicle-mounted cranes comprising a hoisting arm consisting of two hingedly interconnected arm sections the outer one of which is equipped with a longitudinally displaceable boom, a bracket removably attachable to the outer end of said boom and to which bracket is hingedly connected a rocker arm with a longitudinally displaceable boom with means thereon to support a load, in addition to which two hingedly interconnected links are provided to likewise connect said bracket with said rocker arm. Locking bolts secure said bracket to the first-mentioned boom, whereby the bracket together with the rocker arm and the boom thereon may be dismounted from the rest of the crane as a unit which may be attached to the crane whenever increased lifting height is required.

REFERENCES:
patent: 2828867 (1958-04-01), Frisk
patent: 3265219 (1966-08-01), Sundin
patent: 3543944 (1970-12-01), Woodside
patent: 3554395 (1971-01-01), Dunbar
patent: 3854606 (1974-12-01), Hayes et al.

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