发明名称 |
Back packable portable unit |
摘要 |
A portable, backpackable crane lift involving a retractable boom, boom cable, winch and winch cable mounted to a wheeled frame with extendable axles all which fold into a compact unit. A shoulder harness apparatus which attaches to the folded unit for carrying converts to a ballast carrying extension of the frame during operation. Such a lift is readily carried up a ladder for use on flat roofs to raise and place air conditioning heat exchangers and the like.
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申请公布号 |
US4782962(A) |
申请公布日期 |
1988.11.08 |
申请号 |
US19820348816 |
申请日期 |
1982.02.16 |
申请人 |
HACKWORTH, HARRY L.;MITCHELL, GERALD D. |
发明人 |
HACKWORTH, HARRY L.;MITCHELL, GERALD D. |
分类号 |
B66C23/20;(IPC1-7):B66C23/72;B66C23/06;A45F4/02 |
主分类号 |
B66C23/20 |
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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