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    • 2. 发明授权
    • Stowable ladder configured for installation in an opening
    • 可安装在开口中的可安装梯子
    • US06994184B2
    • 2006-02-07
    • US10733765
    • 2003-12-12
    • Brett A. LatimerRonald K. BurigChristine A. BrownDavid E. PlotnerJohn J. FiumefreddoRoy B. Bendickson
    • Brett A. LatimerRonald K. BurigChristine A. BrownDavid E. PlotnerJohn J. FiumefreddoRoy B. Bendickson
    • E06C9/00E04G3/00
    • E04F11/064E06C1/32E06C1/387E06C1/54
    • A folding ladder is configured for installation in an opening to provide access between one floor or space and another floor or space. The folding ladder includes, in one aspect, an upper ladder section having a left ladder rail and a right ladder rail, a lower ladder section having a left ladder rail and a right ladder rail, a hinge rotatably connecting the upper ladder section ladder rails to the lower ladder section ladder rails, and a plurality of steps rotatably disposed between the upper and lower ladder rails. The plurality of steps are configured for rotation between a retracted position and a deployed position. At least one step disposed between the upper ladder rails and at least one step disposed between the lower ladder rails are linked by at least one linkage member so that each of the noted steps rotates between a retracted position and a deployed position upon rotational movement of the upper ladder section relative to the lower ladder section between a closed position and an open position.
    • 折叠梯构造成用于安装在开口中以提供一个楼层或空间与另一楼层或空间之间的通道。 折叠梯子在一个方面包括具有左梯子轨道和右梯子导轨的上部梯形部分,具有左梯子轨道和右侧梯子轨道的下部梯形部分,将上部梯形梯形梯形轨道可旋转地连接到 下梯梯梯轨,以及可旋转地设置在上下梯轨之间的多个台阶。 所述多个台阶构造成用于在缩回位置和展开位置之间旋转。 设置在上梯形轨道之间的至少一个台阶和设置在下梯子轨道之间的至少一个台阶通过至少一个连杆构件连接,使得每个所述步骤在缩回位置和展开位置之间在旋转运动时旋转 相对于下梯子部分的上梯部分在关闭位置和打开位置之间。