DERRICK CRANE
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Jun 9, 2011
app pub date -
Jun 3, 2010
filing date -
Jun 3, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The present invention relates to a derrick crane having a main boom and a derrick boom whose tips are connected to one another via a main guying, with the main guying having a luffing rope arrangement of changeable length arranged between the main boom and the derrick boom to change the length of the main guying on the luffing up of the main boom and with at least two additional guying systems being provided which connect the main guying to the main boom, with the at least two additional g having a fixed length.
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