Floating sheave type pendant pay-out system for pendant supporte

Details Floating sheave type pendant pay-out system for pendant supporte Floating sheave type pendant pay-out system for pendant supporte

1982-06-30

1985-01-01

Basinger, Sherman D.

Traversing hoists

Having horizontally swinging boom or bridge

And vertically swinging

212262, 212267, 52118, B66C 2300

Patent

active

044912285

ABSTRACT:
A method and apparatus is disclosed for controlling the angle of a pivoted, pendant supported extensible boom and the mast-boom angle between working positions and a transport position. The structure for controlling the angle includes a wire rope driven by a winch and trained over a boom supporting hoist and over a pendant take-up hoist which includes a floating sheave assembly connected to an extensible portion of the boom by a fixed length pendant. Another fixed length pendant determines the mast-boom angle when the boom is in working position, and a floating sheave stop is pivoted to the mast in position to cradle and/or abut a portion of the floating sheave assembly for enabling complete control of the mast when moved between its transport position and working positions relative to the boom.

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