发明名称 |
FLOATING SHEAVE-TYPE PENDANT PAY-OUT SYSTEM FOR PENDANT SUPPORTED BOOM |
摘要 |
<p>A method and apparatus is disclosed for controlling the angle of a pivoted, pendant supported extensible boom and the mast-boom angle between working positions and a transport position. The structure for controlling the angle includes a wire rope driven by a winch and trained over a boom supporting hoist and over a pendant take-up hoist which includes a floating sheave assembly connected to an extensible portion of the boom by a fixed length pendant. Another fixed length pendant determines the mast-boom angle when the boom is in working position, and a floating sheave stop is pivoted to the mast in position to cradle and/or abut a portion of the floating sheave assembly for enabling completed control of the mast when moved between its transport position and working positions relative to the boom.</p> |
申请公布号 |
CA1223843(A) |
申请公布日期 |
1987.07.07 |
申请号 |
CA19830431435 |
申请日期 |
1983.06.29 |
申请人 |
FMC CORPORATION |
发明人 |
RATHE, ROBERT A.;POOCK, DARWIN N. |
分类号 |
B66C23/693;B66C23/82;(IPC1-7):B66C23/00 |
主分类号 |
B66C23/693 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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