Hoisting Method
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United States of America Patent
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app pub date -
Dec 18, 2006
filing date -
Jun 18, 2004
priority date (Note) -
Abandoned
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Abstract
A method for hoisting including the acts of lowering a hoisting hook from a jib connected to a jib connection member secured to a hoisting crane having a substantially hollow vertical column. The substantially hollow vertical column has a foot and a top. Further including the act of using an annular bearing structure extending around the substantially hollow vertical column, for guiding and carrying a jib connection member disposed on the annular bearing structure rotateble about the substantially hollow vertical column;
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