Rounded-Heel Pry Bar Assembly for Bending-Resistant Leverage
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Solution Overview
Problem
Existing tools for removing framing and wall structures held together by nails and fasteners are inefficient and prone to bending, lacking the necessary strength and leverage for effective deconstruction.
Innovation Solution
A pry bar assembly with a unique design featuring a claw section, chisel section, and middle section, including a semi-cylindrical heel and angled chisel, providing enhanced leverage and rigidity, reducing bending and allowing for a lightweight construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If existing tools are used for removing framing and wall structures, then the task can be performed, but the tools are prone to bending and lack sufficient strength and leverage
Solution Approach 1:
The pry bar is divided into distinct functional sections: a claw section with a first end for gripping, a middle section with a rounded heel for leverage, and a chisel section with a second end for prying. This segmentation allows each section to be optimized for its specific function while maintaining overall structural integrity and strength.
Solution Approach 2:
The middle section incorporates a rounded heel with a curved surface that provides mechanical advantage and leverage. The curvature allows the tool to distribute forces more effectively and prevents bending by creating a stronger structural transition between the claw and chisel sections.
2Force
If existing tools are used for removing framing and wall structures, then the task can be performed, but the tools lack sufficient leverage for effective deconstruction
Solution Approach 1:
The pry bar design incorporates a rounded heel in the middle section that extends the leverage arm in a different dimensional plane. This curved intermediate section allows the user to apply force more effectively by creating a longer moment arm, thereby increasing mechanical advantage without compromising ease of operation.
3Productivity
If existing tools are used for removing framing and wall structures, then the task can be performed, but the tools are inefficient and prone to bending
Solution Approach 1:
By dividing the pry bar into specialized sections (claw, middle, and chisel), each part is optimized for its specific function, improving overall deconstruction efficiency. The segmented design also allows for better stress distribution, reducing the likelihood of bending and enhancing reliability during intensive use.
4Weight of moving object
If a lightweight construction is used for the pry bar, then the tool is easier to handle, but the tool may lack the necessary strength
Solution Approach 1:
The rounded heel in the middle section uses curved geometry to maximize structural strength while minimizing material usage. The curvature creates a more efficient stress distribution pattern compared to straight transitions, allowing the pry bar to maintain high strength-to-weight ratio and remain both lightweight and strong.
Data Source
AI summary
A pry bar assembly includes a plate that is elongated and has a first end, a second end, a first lateral edge, a second lateral edge, an upper surface and a lower surface. The plate includes a claw section, a chisel section and a middle section positioned therebetween. The claw section includes the first end and a rounded heel. The claw section includes a first portion and a second portion. The first portion is attached to the middle section and curves upwardly and away from the middle section in a semi-cylindrical shape to form the rounded heel. The second portion extends downwardly from the first portion. The chisel section is angled upwardly from the middle section. The upper surface has an elongated crest therein that is spaced from the first and second lateral edges and extends along a length of the middle section and into the chisel section.