发明名称 Arborist limb lowering method
摘要 An apparatus for the controlled lowering to the ground of a cut portion of a tree includes a rope and an anchor having an arrangement of guiding protuberances., each guiding protuberance including a bearing surface frictionally engaging and redirecting the rope without the rope fully encompassing any portion of the anchor including any of the guiding protuberances. Three guiding protuberances define a triangular arrangement. Of the three, a first guiding protuberance is disposed in proximity to an intermediate guiding protuberance defining a segment of a rope path therebetween, and a second guiding protuberance is disposed in proximity to the intermediate guiding protuberance defining another segment of the rope path therebetween without the segments crossing. A mounting member is attachable to the tree and a guiding member is pivotally connected to the mounting member along a pivot axis and includes an arrangement of guiding protuberances generally extending to each side thereof.
申请公布号 US7007927(B2) 申请公布日期 2006.03.07
申请号 US20040492042 申请日期 2004.04.06
申请人 HALAS D CARL 发明人 HALAS D. CARL
分类号 B21F9/00;A01G23/099;A62B1/06;B66D1/60;B66D3/04 主分类号 B21F9/00
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