Upper block

Details Upper block Upper block

2007-11-13

2007-11-13

Brahan, Thomas J. (Department: 3654)

Traversing hoists

Having means to prevent or dampen load oscillations

C212S274000

Reexamination Certificate

active

10967382

ABSTRACT:
A crane having an upper block, a lower block, a drum, and two ropes. The upper block includes an equalizer having a yoke to which the ropes are connected. The connections between the ropes and the yoke include load cells that measure the forces carried by each of the ropes. The upper block includes a fail-safe system that prevents failure of the upper block in overload conditions.

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