Excavating – Cable-operated – Boom-type
Patent
1998-11-25
2000-05-30
Novosad, Christopher J.
Excavating
Cable-operated
Boom-type
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
Harnischfeger Technologies Inc.
Lowe, Jr. James Earl
Novosad Christopher J.
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