发明名称 Step attachment for ladders
摘要 A step attachment for conventional ladders includes two widened, horizontal steps, one in parallel, spaced-apart relation over the other, the forward edge of each step being positioned in the plane of the ladder and adapted for attachment to respective adjacent rungs of the ladder, and two substantially vertical support hangers pivotally and adjustably attached to the rear ends of the steps, the upper ends of which hangers are also positioned in the plane of the ladder and adapted for attachment to a rung of the ladder above the steps and to depend from the rung a sufficient distance downward to accommodate the pivotal, adjustable attachment of the steps to the hangers.
申请公布号 US4241807(A) 申请公布日期 1980.12.30
申请号 US19780961483 申请日期 1978.11.17
申请人 MACSTEP CO INC 发明人 MCKENNA, PHILLIP;PENAROWSKI, ARTHUR
分类号 E06C7/16;(IPC1-7):E06C5/32 主分类号 E06C7/16
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