发明名称 Ladder anchoring system
摘要 A ladder anchoring system, for securing a ladder to a ground surface, the ladder having a lowest rung which has a lowest rung length. The anchoring device comprises a pair of spikes and a pair of retaining arms. Each spike is continuous with one of the retaining arms. The retaining arms each have a downturned portion for engaging the lowest rung of the ladder when the spikes are fully inserted into the ground surface. The spikes are spaced apart a distance substantially equal to the lowest rung length with a primary cross support. Additional rigidity is provided by a pair of arcuate supports which extend between the spikes and the primary cross support, and a secondary cross support, which extends between the arcuate supports.
申请公布号 US5918699(A) 申请公布日期 1999.07.06
申请号 US19980024766 申请日期 1998.02.17
申请人 SUMMERS, JAMES A. 发明人 SUMMERS, JAMES A.
分类号 E06C7/46;(IPC1-7):E06C5/36 主分类号 E06C7/46
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