公开(公告)号：US20100133041A1

公开(公告)日：2010-06-03

申请号：US12623464

申请日：2009-11-23

申请人： Kecheng WANG

发明人： Kecheng WANG

IPC分类号： E06C1/02 ,  E06C1/30 ,  E06C7/02 ,  E06C7/08 ,  E06C7/50

CPC分类号： E06C1/32 ,  E06C1/125 ,  E06C1/39 ,  E06C7/42

摘要： An extension ladder, including multiple ladder sections, each including a pair of pin holes, a pair of columns, and a rung, including a pair of pins, a pair of springs, a gear, a pair of gear racks, and a pair of mounting rings, wherein the columns of adjacent ladder sections are fit with each other, diameters of the columns of the ladder sections increase from the top to the bottom, the pin holes are disposed on the columns, and operate to receive the pins, the pins are coaxial, the gear is disposed on a side wall of the rung and engaged with the gear rack, one end surface of the gear sticks out from the side wall of the rung, a key hole is disposed on the end surface of the gear, the mounting ring operates to fix the pin, and the spring is contacted with the pin.

摘要翻译： 一个延伸梯，包括多个梯形部分，每个梯子部分包括一对针孔，一对柱和一个梯级，包括一对销，一对弹簧，齿轮，一对齿条和一对 安装环，其中相邻梯形部分的柱彼此配合，梯形部分的柱的直径从顶部增加到底部，销孔设置在柱上，并且操作以接收销，销 齿轮设置在梯级的侧壁上并与齿条接合，齿轮的一个端面从轴的侧壁伸出，在齿轮的端面设置有一个钥匙孔， 安装环操作以固定销，并且弹簧与销接触。