Crane structure
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United States of America Patent
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Jan 2, 2018
Issued Date -
N/A
app pub date -
Aug 25, 2009
filing date -
Aug 25, 2008
priority date (Note) -
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Abstract
A crane characterized in that it comprises a lower vertical boom (10) and an upper horizontal boom (12), mutually connected through a joint element (20), in that the lowest part of the vertical boom is connected through a pedestal (14), the pedestal further comprising a slew ring for rotating of the crane about a vertical axis (16), and a tension rod (22) is arranged between the pedestal and the joint element in a distance from the vertical boom and mainly parallel to this in a normal position of the crane.
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