发明名称 Work support attachment for hoists
摘要 The present invention is a work support attachment for use with conventional hoists. The work support attachment comprises a top portion, a middle portion, and a lower portion. The top portion is secured to the conventional hoist device and the lower portion is adapted to be removably receiving an attaching element, such as a hook. This lower portion can rotate freely.
申请公布号 US6491329(B1) 申请公布日期 2002.12.10
申请号 US20000655266 申请日期 2000.09.05
申请人 SMITH JIMMY A. 发明人 SMITH JIMMY A.
分类号 B66C1/34;(IPC1-7):B66C1/34 主分类号 B66C1/34
代理机构 代理人
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