Hydraulically operated cranes

Details Hydraulically operated cranes Hydraulically operated cranes

B - Operations, Transporting

66

C

212/5

B66C 13/12 (2006.01)

Patent

CA 1227463

ABSTRACT A hydraulically operated crane of either the jib or bridge type it the hoist block supported from a trolley movable along the sup- port structure provided by the jib or bridge. The rope and sheave system to control the lifting and lowering of the hoist block provides a balanced fleet through system and the actuating power for the system is provided by a special hydraulic multiplying linear motor mounted in the jib or bridge. The arrangement of the sheaves is such that move- ment of the multiplying linear motor causes travel of the hoist rope to be balanced about the hoist block with the rope taken in or let out evenly over the trolley sheaves.

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