Device in loading cranes

Details Device in loading cranes Device in loading cranes

1977-11-09

1980-01-15

Paperner, L. J.

Material or article handling

Vertically swinging load support

Grab

298 19B, 414680, B66C 1312

Patent

active

041837126

ABSTRACT:
In a loading crane comprising a crane post on which is pivotally mounted a crane arm or boom, and a main hydraulic piston-and-cylinder unit the lower end of which is pivotally connected to the base of the crane post and the upper end of which is pivotally connected to the inner crane arm end to effect raising and folding movements of said arm, a device, preferably in the form of an auxiliary piston-and-cylinder unit, arranged to displace the upper fulcrum of the main cylinder unit away from the crane post, past an imaginary line extending between the fulcrum pin on which the crane arm pivots relative to said post and the lower fulcrum point of the main cylinder unit.

REFERENCES:
patent: 3125235 (1964-03-01), Frangos
patent: 3220698 (1965-11-01), Carder
patent: 3367512 (1968-02-01), Kaplan

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