发明名称 Safety ladder attachment
摘要 A safety attachment for a ladder of the type which comprises a pair of spaced apart parallel side rails and a plurality of rungs extending between the side rails. The safety attachment includes a pair of tubular members, each of which is secured to a corresponding one of the side rails of the ladder. Two extension arms are also provided. One end of each of the extension arms has a friction pad secured thereto. The other end of each extension arm is pivotally attached to the top end of a corresponding one of the tubular members.
申请公布号 US6152261(A) 申请公布日期 2000.11.28
申请号 US19990318920 申请日期 1999.05.26
申请人 HOEY, DALE E. 发明人 HOEY, DALE E.
分类号 E06C7/48;(IPC1-7):E04G5/02 主分类号 E06C7/48
代理机构 代理人
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