Traversing hoists – Having counterweight or counterbalancing means – Counterweight movable relative to load support
Patent
1983-04-25
1985-08-20
Blix, Trygve M.
Traversing hoists
Having counterweight or counterbalancing means
Counterweight movable relative to load support
212199, 212235, 212239, 212262, 212270, B66C 2300
Patent
active
045359008
ABSTRACT:
A transfer apparatus and method utilizing a boom having complete spatial freedom. The boom is supported by a series of ropes and may be moved in any of three mutually parallel planes so as to transfer material in any desired manner, as by utilizing a conveyor system or a lifting rope.
REFERENCES:
patent: 625085 (1899-05-01), Conley
patent: 1131518 (1915-03-01), Hodgman
patent: 3107790 (1963-10-01), Lehmann
patent: 3339707 (1967-09-01), Ludwig
Avila Stephen P.
Blix Trygve M.
Fluor Corporation
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