Cranes

Details Cranes Cranes

1981-08-10

1984-06-12

Cherry, Johnny D.

Traversing hoists

Having means facilitating assembly or disassembly

Of traversing hoist from support

212262, 212266, B66C 2306, B66C 2336

Patent

active

044536437

ABSTRACT:
Described herein are cranes and particularly those which are stability balanced, normally mounted on a truck or similar vehicle and provided with a boom of telescoping sections. The crane according to the invention has a boom provided with an upper lattice extension and a fly jib, attached (preferably pivotally), to the boom adjacent the top thereof or to the lattice extension at a point on the lower half of the extension. As this arrangement provides a reasonable length of boom, or lattice extension thereof, above the connection point of the fly jib, a substantial moment arm is provided enabling a relatively long and heavy fly jib to be employed giving greater stability to the top portions of the crane. Also the arrangement enables increased lift capability, at comparable radii, as compared with a standard crane, or similar lift capabilities at an increased working radius.

REFERENCES:
patent: 3084806 (1963-04-01), Staples
patent: 3149730 (1964-09-01), Mork
patent: 3491897 (1970-01-01), Tax et al.
patent: 4053060 (1977-10-01), Wilson
patent: 4141455 (1979-02-01), Henderson

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