Upper block
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Nov 13, 2007
Grant Date -
Mar 30, 2006
app pub date -
Oct 18, 2004
filing date -
Sep 8, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A crane having an upper block, a lower block, a drum, and two ropes. The upper block includes an equalizer having a yoke to which the ropes are connected. The connections between the ropes and the yoke include load cells that measure the forces carried by each of the ropes. The upper block includes a fail-safe system that prevents failure of the upper block in overload conditions.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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