Ladder Levelling Stabilizer With Independent Pivot Legs
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Solution Overview
Problem
Ladders and similar apparatuses often lack stability and security when positioned on uneven or unlevel ground due to limited footprint and improvised leveling methods, leading to unsatisfactory and unstable positioning.
Innovation Solution
A levelling stabilizer comprising a transverse brace with pivotally fitted leg portions and an adjustment arm that allows independent extension of legs from the ladder's footprint, featuring a rotatable adjustment arm with threaded and non-threaded portions, a thumb screw, and a retraction lock to secure the legs in place, increasing the ladder's footprint and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the ladder footprint is increased to improve stability on uneven ground, then the stability and security are enhanced, but the device complexity and construction constraints are worsened
Solution Approach 1:
The stabilizer divides the ladder base into separate leg portions that can be independently adjusted. Each leg portion is a distinct segment that pivots independently from the transverse brace, allowing individual adjustment to compensate for uneven ground without requiring complex overall restructuring of the ladder.
Solution Approach 2:
The stabilizer employs dynamic adjustment mechanisms including pivotable leg portions and adjustable arms that can be moved between retracted and extended positions. The threaded portions and thumb screws enable dynamic positioning to adapt to various ground conditions while maintaining structural integrity.
2Adaptability or versatility
If adjustable leg portions are added to increase footprint, then the adaptability to uneven terrain is improved, but the ease of operation is worsened
Solution Approach 1:
The stabilizer design incorporates self-adjusting features where the threaded portions and thumb screws allow the user to easily adjust the leg portions without requiring complex tools or procedures. The mechanical threading mechanism provides self-contained adjustment capability that simplifies operation while achieving adaptability to various ground conditions.
3Manufacturing precision
If the adjustment arm is made rotatable with threaded portions for precise adjustment, then the manufacturing precision is improved, but the ease of manufacture is worsened
Solution Approach 1:
The threaded portions act as intermediary mechanisms between the adjustment arm and leg portions, providing precise angular adjustment through simple screw-thread geometry. This intermediary element translates rotational motion into precise positional control without requiring complex machining, as standard threading can be manufactured using conventional processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The levelling stabilizer significantly enhances the stability and security of ladders on uneven terrain by increasing the footprint up to fourfold, allowing safe use on a variety of surfaces and preventing unintended leg retraction, thus ensuring user safety and load-bearing capability.
Implementation Method 1
the adjustment arm including a threaded portion which is adapted to co-operate with its respective leg portion such that the adjustment arm resists movement of the leg portion when in the second extended position except by rotation of the treaded portion
Implementation Method 2
two leg portions pivotally fitted to the brace and an adjustment arm acting between the brace and the leg portions so as to allow each leg portion to be independently moved between a first fully retracted position being aligned longitudinally with its respective stile and a second fully extended position at an angle normal to said stile
Data Source
AI summary
A levelling stabilizer for a ladder and the like comprising a transverse brace (1) adapted for bridging the bottom stiles (2) of said ladder, two leg portions (3) pivotally fitted to said brace and an adjustment arm (7) acting between said brace and said leg portions to allow each said leg portion to be independently moved between a first fully retracted position aligned longitudinally with its respective stile and a second fully extended position at an angle normal to said stile.