发明名称 Extension ladder roof support attachment
摘要 An extension ladder roof support attachment for a ladder that has side rails is provided and consists of a pair of base arms extending from upper portions of said side rails, a pair of angular arms extending from upper portion of said side rails above said base arms and attached to outer ends of said base arms, a cross brace extending diagonally between said angular arms and a stabilizing member extending between said base arms which can sit upon a roof of a building. In a modification the base arms and angular arms are adjustable to various roofs and buildings.
申请公布号 US4723632(A) 申请公布日期 1988.02.09
申请号 US19860906522 申请日期 1986.09.12
申请人 GEDGOUDAS, LEO C. E.;SPECTOR, GEORGE 发明人 GEDGOUDAS, LEO C. E.;SPECTOR, GEORGE
分类号 E06C7/48;(IPC1-7):E06C7/48 主分类号 E06C7/48
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