Jib crane
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United States of America Patent
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Mar 27, 2012
Grant Date -
Mar 25, 2010
app pub date -
Oct 16, 2007
filing date -
Oct 17, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A jib crane which can prevent an unexpected movement of a burden and can sufficiently ensure the safety of a burden handling work is disclosed. The jib crane has hoisting wire ropes for lifting and landing a hook, derricking wire ropes for derricking operation of a jib, and a conversion device for fixing tips of the wire ropes to a revolving frame of a revolving table. The conversion device has a V-shaped link pivotally supported on a bearing bracket via a pivot pin. The tips of the wire ropes are connected to paired link arms of the V-shaped link.
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