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    • 10. 发明授权
    • Ladder hoist attachment
    • 梯子起重机附件
    • US4598795A
    • 1986-07-08
    • US747561
    • 1985-06-21
    • Kevin Larson
    • Kevin Larson
    • E06C7/12E06C7/48E06C7/00
    • E06C7/12E06C7/48
    • A ladder hoist attachment consists of a boom and prop combination that allows a conventional ladder to be used to hoist heavy loads. The boom assembly consists of a number of feet that removably attach to a rung of the ladder; a boom that extends horizontally over the top rung of the ladder; and braces connecting the feet and boom that also rest against the top rung of the ladder. One end of the prop removably attaches to a lower rung of the ladder. The other end of the prop has a vertical step to hold the ladder at a predetermined distance away from the edge of the roof. A winch or pulley is suspended from the end of the boom extending over the top rung of the ladder to allow loads to be lifted through the prop and between the ladder and the building. After the load has been lifted above the height of the roof, the end of the prop against the building is lifted by the user to allow the ladder to be moved to rest against the edge of the roof, thus allowing the load to be lowered on to the roof.
    • 梯子起重机附件由吊杆和支柱组合组成,允许使用传统的梯子来提升重载荷。 吊杆总成包括可拆卸地附接到梯子梯级的多个脚部; 在梯子的顶层上水平延伸的吊杆; 以及连接脚和吊杆的支架,其也靠在梯子的顶层上。 支柱的一端可拆卸地附着在梯子的下层。 支柱的另一端具有将梯子保持在离屋顶边缘预定距离处的垂直台阶。 绞车或滑轮从悬臂的末端悬挂在梯子的顶部梯级上,以允许负载通过支柱升降,并且在梯子和建筑物之间。 在负载被提升到屋顶的高度之上之后,使用者抬起支撑在建筑物上的端部,以使梯子被移动以抵靠在屋顶的边缘上,从而允许负载降低 到屋顶