发明名称 Ladders
摘要 A ladder is provided with an attaching device at its top end whereby it can be quickly and securely attached to a vertical pole, tree-trunk or the like. The attaching device comprises a pair of jaws to pass one on each side of the vertical pole, and it can pivot until the jaws engage the pole. The ladder is suspended from the pivot of the attaching device, and may then be secured at its bottom end to prevent it from swinging.
申请公布号 US4467890(A) 申请公布日期 1984.08.28
申请号 US19820394152 申请日期 1982.07.01
申请人 MCCALLUM ENTERPRISES LIMITED;FEDERATED FARMERS OF NEW ZEALAND;AUCKLAND PROVINCE INC. 发明人 MCCALLUM, BRUCE D.;MCCALLUM, SCOTT J.
分类号 E06C1/34;E06C1/38;E06C7/48;(IPC1-7):E06C1/36 主分类号 E06C1/34
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