Patent ID: 9109396
Filing Date: 2015-08-18
Classification: B64F,E04G,E06C

Abstract:
1. A ladder comprising: an inclined stair section having a plurality of steps, a vertical upright that connects to a top of the stair section, the vertical upright not having steps, one or more wheels connected to the bottom of the vertical upright, the stair section having a predetermined width; a movable linkage disposed along a bottom of the ladder and extending substantially horizontally between and operatively connecting a front locking step to a rear wheel assembly; and a narrow base extending between and being directly connected to both a step of the stair section above the front locking step and the vertical upright, the narrow base having a predetermined width less than the predetermined width of the stair section, and wherein the narrow base is fixedly attached to and non-movable with respect to both the inclined stair section and a vertical upright.