发明名称 SAFE-T-CLAW EXTENSION LADDER POLE CLIMBING DEVICE
摘要 <p>An apparatus that fits onto a ladder for securing the ladder safely to a circular pole. The apparatus has a pair of curved arms that are each rotatable about a pivot so that they will close onto a pole. The anus are caused to rotate by a lever portion that contacts the pole as the ladder is forced toward the pole such as when it Is set up and when a climber begins to climb the ladder. As the lever portion is forced against the pole the curved arm rotates to enclose the pole. The arms have a symmetrical control element in the form of meshed gears so that they act symmetrically as they are set up initially and as they rotated into the enclosing position.</p>
申请公布号 WO2010011795(A1) 申请公布日期 2010.01.28
申请号 WO2009US51466 申请日期 2009.07.22
申请人 SCHWENKE, DONALD, RICHARD;CINQUEMANI, MICHAEL, RAYMOND 发明人 SCHWENKE, DONALD, RICHARD;CINQUEMANI, MICHAEL, RAYMOND
分类号 E06C1/34 主分类号 E06C1/34
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