发明名称 Tree step
摘要 A tree step which provides a safe and efficient method for a person to climb a tree without inflicting damage to the tree. The device comprises a frame having a pair of hooks thereon, a landing projecting from the frame for placement of a foot, and a line for securing the frame to the tree. The line is secured at one end to the frame and has an intermediate reach which encircles the tree and a free end reach which is adapted to be wound a plurality of times around the hooks. The frame is then moved relative to the tree to lock the line in place around the hooks.
申请公布号 US4618028(A) 申请公布日期 1986.10.21
申请号 US19850812825 申请日期 1985.12.23
申请人 DALE, JERRY D. 发明人 DALE, JERRY D.
分类号 A63B27/00;A63B29/04;E06C9/04;(IPC1-7):A63B29/04;A01M31/00 主分类号 A63B27/00
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