Auxiliary counterweight arrangement for mobile crane

Details Auxiliary counterweight arrangement for mobile crane Auxiliary counterweight arrangement for mobile crane

1979-05-25

1981-03-31

Marbert, James B.

Traversing hoists

Having means facilitating assembly or disassembly

Of counterweight from hoist

212197, B66C 2372

Patent

active

042588529

ABSTRACT:
An auxiliary counterweight arrangement resists lateral as well as forward tipping of a mobile crane that has a platform rotatable about a vertical axis and a boom mounted on the platform to swing in a vertical plane containing said axis. The boom normally projects at a forward and upward inclination from the platform, and its top, from which a load line depends, may be connected with the top of a mast that is behind it, in the same vertical plane. Two surface-supported counterweight carriers are rigidly attached to the platform, spaced equal distances to the rear of it and at equal distances to opposite sides of said vertical plane. Each carries a counterweight. With a mast on the platform, a guy line extends from its top to each counterweight; otherwise, a guy line extends from the top of the boom to each counterweight. Lengthening the arms of the V-shaped rigid connection between platform and counterweight carriers increases resistance to lateral tilting in step with increased resistance to forward tilting.

REFERENCES:
patent: 3842984 (1974-10-01), Brown et al.
patent: 3930583 (1976-01-01), Jouffray

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