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1. 发明申请

US20050284044A1 Collapsible Spiral Stair 审中-公开
标题翻译：可折叠螺旋楼梯
公开(公告)号：US20050284044A1
公开(公告)日：2005-12-29
申请号：US10710014
申请日：2004-06-12
申请人： Jonathan Ritchie
发明人： Jonathan Ritchie
IPC分类号： E04F11/00 , E04F11/032
CPC分类号： E04F11/032
摘要： A spiral stair that can be collapsed allowing the permanent footprint of the stair to be decreased or eliminated. The stair can be constructed of metal or other common material possessing sufficient strength and rigidity for the application. The stair can be constructed with either a fixed center pole along which then individual steps translate vertically or a telescoping center pole that can be collapsed in sections similar to an automatic antenna. The individual steps would be attached to the various sections and when the center pole is collapsed, the steps would be compressed with the pole into a smaller overall space. A stair could also be constructed in similar fashion to current spiral stairs except the stair case as a unit can be translated vertically, preferably the stair would be raised as a unit into an attic.
摘要翻译：可以倒塌的螺旋楼梯，允许楼梯的永久足迹减少或消除。楼梯可由金属或其他具有足够强度和刚度的普通材料构成。楼梯可以用固定的中心杆构成，然后单独的梯级沿垂直方向平移或可以与自动天线类似的部分折叠的伸缩中心柱。单独的步骤将附接到各个部分，并且当中心杆被折叠时，台阶将被杆压缩成更小的整体空间。楼梯也可以按照与当前螺旋楼梯相似的方式构造，除了楼梯外壳之外，一个单元可以垂直翻转，最好楼梯将作为一个单元升高成阁楼。

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