公开(公告)号：US20100116592A1

公开(公告)日：2010-05-13

申请号：US12269016

申请日：2008-11-11

Applicant: Jeffrey David Clements ,  Rodney Wayne Rosenthal

Inventor： Jeffrey David Clements ,  Rodney Wayne Rosenthal

IPC: E06C7/04

CPC classification number: E06C7/44 ,  E06C1/39 ,  E06C7/46

Abstract: A stepladder with four individually adjustable, self-locking rails so that the ladder can be placed on uneven terrain then safely adjusted to maintain level orientation. The ladder rails will consist of four pairs of outer and inner rails. Each outer and inner rail pair is designed with profiles that when brought together will lock into one another providing stability yet minimal friction. Each inner rail is held in place by a spring-loaded lever with attached hooks. The spring forces the hooks to be engaged with an adjustment bracket that is fixed to the outer rail. A foot will be fixed to the bottom of each inner rail. Each foot will have arched surfaces along 2 perpendicular horizontal axes so that consistent surface area contact is maintained with the ground regardless of the angle of the ground. On a level surface, when the ladder is in an un-adjusted state, the four inner rails are designed to be extended with respect to the outer rails providing equal distance between each step and reducing weight and production costs.

Abstract translation: 梯子具有四个可单独调节的自锁导轨，使梯子可以放置在不平坦的地形上，然后安全调整以保持水平方向。 梯子轨道将由四对外轨和内轨组成。 每个外轨道和内轨对都设计有轮廓，当组合在一起时将彼此锁定，从而提供稳定性，但最小的摩擦力。 每个内轨通过带有连接钩的弹簧加载杆固定在适当位置。 弹簧迫使钩与固定在外轨上的调节支架接合。 一只脚固定在每个内轨的底部。 每个脚将沿着两个垂直的水平轴线具有拱形表面，以便与地面的角度保持一致的表面积接触。 在水平表面上，当梯子处于未调整状态时，四个内轨道被设计成相对于外轨道延伸，在每个台阶之间提供相等的距离，并减轻重量和生产成本。