Boom support structure for a hoist rope support sheave

Excavating – Cable-operated – Boom-type

Patent

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Details

254398, E02F 502, E02F 914

Patent

active

06067735&

ABSTRACT:
A machine for heavy loads comprising a rope support sheave mounted on a boom between upper and lower ends of the boom for movement between a raised position wherein the sheave supports a hoist rope above the boom and a lowered position wherein the rope support sheave is accessible for maintenance.

REFERENCES:
patent: 3829992 (1974-08-01), Reid et al.
patent: 3912230 (1975-10-01), Learmont

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