Apparatus for unloading of bulk material from the cargo holds of ships
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United States of America Patent
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-
Jan 20, 1998
Grant Date -
N/A
app pub date -
Oct 22, 1996
filing date -
Mar 3, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for unloading bulk material from a ship adjacent a dock has a portal support movable longitudinally on the dock parallel to the ship and carrying a boom having an inner end pivoted about an inner axis on the support and an outer end positionable over the ship. A conveyor extends between the ends of the boom and a catch bin is provided on the outer end of the boom above the conveyor. An outrigger arm pivotal on the outer end of the boom about an outer axis has an outer end over which passes a cable from which is suspended a grab. A winch connected to the cable can raise the grab from a position in a hold of the ship to a position above the catch bin. The arm is then pivoted to position the grab above the catch bin and then material is dumped from the grab into the catch bin so that it can be conveyed to the dock by the boom conveyor.
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