Derrick
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Feb 8, 1994
Grant Date -
N/A
app pub date -
Oct 5, 1992
filing date -
Oct 5, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A derrick for raising and lowering a cargo container which comprises a tri-pod structure having a pulley within its apex for engaging and lifting and lowering the load. The tri-pod structure has a roller for engaging the load at the top or apex of the derrick with a hook for engaging the cargo container at its base. The hook includes a pair of shoes one for engaging the outside surface of the cargo container and a second one for engaging the inside surface of the cargo container at the area of hook contact with the cargo container.
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