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.
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
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