发明名称 |
Crane trim, list, skew and snag protection system |
摘要 |
The present invention utilizes a hoist drum with a number of different diameter sections upon which the different ends of a lifting cable simultaneously spool on and off of as a function of counterclockwise and clockwise cable spooling. This combination reduces the amount of shaft torque required to raise or lower a load while increasing the number of hoist drum rotations required to raise or lower that load. These two features are incorporated into the operation of a main crane cable length adjusting device since they offer precise and rapid adjustment capabilities to be made with smaller sized electric motors and clutches.
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申请公布号 |
US7500575(B2) |
申请公布日期 |
2009.03.10 |
申请号 |
US20060605783 |
申请日期 |
2006.11.28 |
申请人 |
CAPER, PHILLIPS & ASSOCIATES |
发明人 |
ZHANG DIANREN |
分类号 |
B66C11/00 |
主分类号 |
B66C11/00 |
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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