发明名称 Ladder attachment
摘要 A device for attachment to a ladder which enables the upper end of a ladder to be spaced from the wall of the building, span windows and/or rest on a slant roof and thus span the gutters. The device also acts as a stabilizer bar or tube to prevent slippage of the ladder laterally, gives greater stabilization to the ladder, and almost automatically positions the ladder at the correct angle of inclination away from the lower wall of a building, and generally promotes a greater margin of safety. Also, the device is readily separable after use for small compact storage.
申请公布号 US4061203(A) 申请公布日期 1977.12.06
申请号 US19770772932 申请日期 1977.02.28
申请人 SPENCER TOOL & MFG. CO. INC. 发明人 SPENCER, FREDERICK J.;SPENCER, EDWARD
分类号 E06C7/48;(IPC1-7):E06C7/48 主分类号 E06C7/48
代理机构 代理人
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