WINDING DRUM AND METHOD FOR OPERATING A WINDING DRUM
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United States of America Patent
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Issued Date -
Apr 19, 2012
app pub date -
Apr 19, 2011
filing date -
Apr 19, 2010
priority date (Note) -
Abandoned
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Abstract
In a method of operating a winding drum, in particular of cranes, for a line to be reeled in or paid out, a hydraulic motor is activated by a control block which has a hydraulic valve assembly comprised of two pressure control valves respectively arranged in a feed line and a return flow line, for operating the winding drum. The pressure control valves are provided to set a pressure differential on the hydraulic motor in order to maintain a defined tautness of the line being reeled in or paid out.
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