Enclosed-reeving, live-line boom

Details Enclosed-reeving, live-line boom Enclosed-reeving, live-line boom

2008-03-11

2008-03-11

Brahan, Thomas J (Department: 3654)

Traversing hoists

Having horizontally swinging boom or bridge

Having fluid ram directly actuating load cable or sheave...

C254S386000

Reexamination Certificate

active

07341157

ABSTRACT:
A crane comprising a boom formed as an elongate tubular structure and a line assembly to extend a line from a least one end of the boom. The line assembly may include a first bank of sheaves, a second bank of sheaves, a line reeved around the first and second banks of sheaves, and an extension mechanism controlling the distance between the first and second banks of sheaves. The second bank of sheaves and at least a portion of the extension mechanism being enclosed within boom.

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