Low-profile crane without topping tower

Details Low-profile crane without topping tower Low-profile crane without topping tower

B - Operations, Transporting

66

C

212/26

B66C 23/06 (2006.01) B66C 23/10 (2006.01) B66C 23/82 (2006.01)

Patent

CA 1098489

ABSTRACT A Low-Profile Crane without Topping Tower A hoisting line (9) extends from a winch (8), over a second pulley (12) at the head end (3) of the jib (1) of a crane, around a movable pulley (14) and over a third pulley (13) at the head end (3) of the jib (1) to a depending load hook (18). The movable pulley (14) is supported by a topping line (7) which extends over a first pulley (11) at the tail end (2) of the jib (1), around a fifth pulley (15) fix- edly mounted on the base (4) of the crane and is attached to the first pulley (11). Loading in the hoisting line (9) is therefore transferred to the topping line (7) extending between the first and fifth pulleys (11 and 15) and topping of the jib (1) about an axis (5) between the tail and head ends (2 and 3) is effected by a light-weight piston-cylinder assembly (6).

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