Browse Prior Art Database

Adjustable Ladder for Use on Uneven or Sloped Surface

IP.com Disclosure Number: IPCOM000004374D
Publication Date: 2000-Oct-19
Document File: 1 page(s) / 121K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention is for an adjustable ladder wherein one leg (side) of the ladder has an adjustable section at its lower end. This enables the ladder to be placed against a vertical surface without tilting from left to right or right to left, even when it is standing on a surface that is uneven or slopes in a direction that is non-perpendicular to the vertical surface that the ladder is leaning on.

This text was extracted from a RTF document.
This is the abbreviated version, containing approximately 100% of the total text.

Adjustable Ladder for Use on Uneven or Sloped Surface

Most ladders can be used safely on a level surface or on a surface that slopes upward or downward in the direction perpendicular from the vertical surface that the ladder is leaning on. However, if a surface is uneven or slopes in a direction that is non-perpendicular to the vertical surface that the ladder is leaning on the ladder will lean to the left or right, posing a hazard. Typically, ladder users will place a brick, a piece of scrap wood, a rock or some other makeshift device under one of the feet of the ladder in order to reduce the amount by which it leans to the left or right. Not only is this approach inconvenient, since a makeshift device of the right size is not always readily available, but it is extremely hazardous since the device my break, dislodge, or shift during use, causing the ladder to tip over to one side.

The present invention is for an adjustable ladder wherein one leg (side) of the ladder has an adjustable section at its lower end. This enables the ladder to be placed against a vertical surface without tilting from left to right or right to left, even when it is standing on a surface that is uneven or slopes in a direction that is non-perpendicular to the vertical surface that the ladder is leaning on.

The ladder is shown in the accompanying drawing (below), which is not drawn to scale. Short side (2), which is shorter than long side (1), contains a plurality of holes for bolts (4) along its lower end. An adjustable section (3), which contains a plurality of holes for bolts (4) along its length, can be attached to short side (2) using at least 2 bolts (7) and 2 wing nuts (6) in a variable fashion such that the resulting length of short side (2) with adjustable section (3) attached is longer, equal to, or shorter than longer side (1) by a length that can be selected by the user to compensate for surface unevenness or slope. Use of wing nuts (6) enables length adjustments to be made quickly and by hand, without a need for any tools.