发明名称 Tree ladder attachment
摘要 A tree ladder attachment for attachment to a tree to permit a user to climb up the tree. The tree ladder attachment includes a vertical bar with a horizontal bar coupled to a lower end of the vertical bar. The ends of an elongate flexible member are coupled to an upper end of the vertical bar. The flexible member forms a loop for wrapping around a tree trunk to hold the vertical bar to the tree trunk. A cross bar is connected to the horizontal bar by a pair of extension bars. A ladder comprising a spaced apart pair of elongate flexible rails and a plurality of spaced apart rungs is depended from the cross bar.
申请公布号 US6006864(A) 申请公布日期 1999.12.28
申请号 US19980190571 申请日期 1998.11.12
申请人 MUSK, FRANK WALTER 发明人 MUSK, FRANK WALTER
分类号 A01M31/02;E06C1/34;(IPC1-7):E04G3/00 主分类号 A01M31/02
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