Nested sheave arrangement for a telescopic boom and applications of same
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United States of America Patent
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Dec 27, 2016
Grant Date -
Aug 27, 2015
app pub date -
Oct 1, 2014
filing date -
Feb 26, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
In one aspect of the invention, a telescopic boom includes a plurality of boom sections, and a sheave assembly disposed between two adjacent boom sections. The sheave assembly includes two sheave assembly sets. Each sheave assembly set includes a plurality of sheaves having different diameters. The plurality of sheaves is arranged abreast along a lengthwise direction of the adjacent boom sections and the diameters of the plurality of sheaves increase successively along the lengthwise direction of the adjacent boom sections. Each sheave is wound with one or more cables. The invention also discloses engineering machinery having the telescopic boom.
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