Method for using a revolver crane, and a revolver crane
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United States of America Patent
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Jan 21, 2003
Grant Date -
N/A
app pub date -
Oct 20, 1999
filing date -
Oct 20, 1998
priority date (Note) -
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Abstract
A method for using a revolver crane, comprising the positioning of a ballast on a platform ring in accordance with the repositioning of a load which is supported by a boom, is repositioned in relation to the platform ring as well, so as to cause a balance of moments. A revolver crane for performing this method comprises ballast hoisting elements for hoisting said ballast and repositioning it in relation to the platform ring.
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