发明名称 Safety device for ladders
摘要 A device for supporting a person on a ladder in which a frame is provided for extending around the ladder with sufficient clearance to move relative to said ladder. A portion of the frame extends at an angle relative to the remaining frame and inwardly towards the ladder. The frame can be connected to the person at a position that of said angularly-extending portion so that movement of the person downwardly on said ladder causes said angularly-extending portion to move between the ladder stays and engage a rung on said ladder to prevent further downward movement.
申请公布号 US4406350(A) 申请公布日期 1983.09.27
申请号 US19820383228 申请日期 1982.05.28
申请人 SMITH, SAMUEL D. 发明人 SMITH, SAMUEL D.
分类号 E06C;E06C7/18;(IPC1-7):E06C7/18;A62B1/16 主分类号 E06C
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