发明名称 Lifting device
摘要 A lifting device comprises a rotatable pawl with a pawl arm held in a pawl sleeve. The pawl has an open position in which a rope may be freely adjusted in tightening or loosening directions, and a closed position in which the rope is lockably engaged between the pawl and the pawl sleeve. The pawl has a pawl arm against which the locked rope may be directed to rotate the pawl into an open position. The lifting device also includes a pulley for mechanical advantage, and a base for mounting to a surface. A preferred embodiment of the lifting device of the invention comprises a plurality of pulleys for additional mechanical advantage, and is pivotally attached to an overhead surface.
申请公布号 US2003071253(A1) 申请公布日期 2003.04.17
申请号 US20010757796 申请日期 2001.01.10
申请人 LOB CHARLES J.;MILLMAN JOHN S. 发明人 LOB CHARLES J.;MILLMAN JOHN S.
分类号 B66D3/06;(IPC1-7):B66D3/04 主分类号 B66D3/06
代理机构 代理人
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