Raisable-lowerable member for crane
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United States of America Patent
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Dec 20, 2016
Grant Date -
Jul 31, 2014
app pub date -
Jan 24, 2014
filing date -
Jan 29, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
Provided are a raisable-lowerable member capable of shortening a time required for assembling and disassembling of a crane, and a crane comprising the raisable-lowerable member. The raisable-lowerable member comprises: a boom attachable to an upper slewing body of the crane turnably about a boom-pivot-turn-axis in a raising-lowering direction; and a mast to be driven so as to be turned about a mast pivot-turn-axis parallel to the boom-pivot-turn-axis. The boom includes a boom body, a boom foot joined to a basal end of the boom body and adapted to be attached to the upper slewing body turnably about the boom-pivot-turn-axis, and a mast mounting portion joined to the basal end of the boom body. The mast has a basal end which includes a mast foot to be attached to the mast mounting portion turnably about the mast pivot-turn-axis.
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