发明名称 |
HEIGHT-ADJUSTABLE TREE SEAT |
摘要 |
Apparatus for ascending and descending a tree, pole, or similar cylindrical vertical member is provided with a seat and with manually operable mechanism so that a person seated thereon can raise and lower himself along the vertical member. Height is determined by controlling rotation of a positioning wheel having a resilient peripheral surface in frictional engagement with the vertical member.
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申请公布号 |
US3727723(A) |
申请公布日期 |
1973.04.17 |
申请号 |
USD3727723 |
申请日期 |
1971.02.16 |
申请人 |
PITCAIRN L,US;KURKJIAN H,US |
发明人 |
PITCAIRN L,US;KURKJIAN H,US |
分类号 |
A63B27/00;(IPC1-7):A63B27/00 |
主分类号 |
A63B27/00 |
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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