Lifting apparatus with compensation means
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United States of America Patent
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Feb 1, 2011
Grant Date -
Jun 18, 2009
app pub date -
Dec 12, 2008
filing date -
Dec 14, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
The present disclosure relates to a lifting assembly such as a jib crane or similar apparatus having an articulated arm assembly and a flexible means for connecting a load to an actuator. The lift arm assembly forms an articulated cantilever boom, which is extensible so as to traverse a suspended load within a work cell area. The lift arm assembly further includes a first and second member pivotally connected to one another whereby an inclined plane (e.g., a cam) at the pivot point of the articulating arms provides a vertical displacement of the secondary arms thereby moving the distal end of the secondary arm to counterbalance inherent forces acting thereon.
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