Horizontal Gripping Fastener Extraction Tool
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Solution Overview
Problem
Existing hand tools, such as hammers and nail guns, are inadequate for efficiently extracting fasteners like nails and staples from workpieces without damaging the surface, especially when the fasteners are flush or embedded below the surface, requiring multiple tools and slowing down the extraction process.
Innovation Solution
A hand tool with pivotally joined halves and gripping jaws that can operate horizontally to access and extract fasteners from the side, featuring a fulcrum on the bottom for leverage and minimal surface damage, along with optional features like striking surfaces, spring systems, and compound pivots for enhanced extraction capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If vertical pincer-like jaws are used to extract fasteners, then extraction force is improved, but surface damage increases significantly
Solution Approach 1:
The patent inverts the conventional vertical extraction approach by implementing horizontal gripping jaws that approach the fastener from the side rather than from above. This inversion allows the fulcrum to contact the workpiece surface at a broader area, distributing the extraction force and minimizing surface damage while maintaining effective extraction capability.
Solution Approach 2:
The patent transitions from vertical extraction (one-dimensional force application) to horizontal gripping (two-dimensional force distribution). The horizontal orientation of the gripping jaws allows force to be applied perpendicular to the fastener axis, creating a more distributed stress pattern that reduces concentrated surface damage.
2Productivity
If a fulcrum with small contact area is used for leverage, then extraction efficiency is improved, but surface damage increases
Solution Approach 1:
The patent changes the orientation of the fulcrum from a small vertical contact point to a broader horizontal surface. This dimensional change allows the fulcrum to distribute leverage forces across a larger area of the workpiece surface, maintaining extraction efficiency while reducing surface damage.
3Adaptability or versatility
If multiple tools are used to extract embedded fasteners, then extraction capability is improved, but operation complexity increases
Solution Approach 1:
The patent creates a universal tool that combines multiple functions in one device: the horizontal gripping jaws can extract fasteners at various depths, the fulcrum provides leverage for embedded fasteners, and the overall design accommodates different fastener types. This multi-functionality eliminates the need for multiple separate tools while maintaining comprehensive extraction capability.
Solution Approach 2:
The patent merges the functions of fastener gripping, leverage application, and surface contact into a single integrated tool head design. The horizontal jaws and fulcrum work together as a unified system, combining what were previously separate operations into one tool.
4Object-affected harmful factors
If fasteners are driven below surface level, then appearance is improved, but extraction difficulty increases
Solution Approach 1:
The patent inverts the extraction approach by using horizontal jaws that can access fasteners at their embedded level rather than requiring them to protrude. This allows direct gripping of subsurface fasteners without needing to first raise them above the surface, maintaining appearance quality while easing extraction.
Solution Approach 2:
The horizontal gripping jaws are designed to approach and engage the fastener at its embedded position before full extraction. This preliminary engagement at the subsurface level allows the tool to gradually lift the fastener without requiring it to be initially raised above the surface.
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
Enables efficient extraction of fasteners from any depth without significant surface damage, allowing for single-tool operation and increased productivity by gripping and removing fasteners effectively from a horizontal orientation.
Implementation Method 1
The tool includes a spring system that can be used to automatically open the jaws after a fastener has been extracted
Implementation Method 2
The handles are preferably offset above the plane of the tool head such that they operate as a lever in cooperation with a fulcrum on the bottom of the tool head to extract the fastener
Data Source
AI summary
The hand tool is used to extract a fastener from a material by preferably gripping the fastener from a horizontal orientation. The hand tool has a head with two pivotally joined halves including at least one pair of gripping jaws. The tool head preferably includes tips that may be used to dig beneath a fastener head that is flush with or set below a surface. The tool includes a pair of handles operable to close the gripping jaws. The handles are preferably offset above the plane of the tool head such that they operate as a lever in cooperation with a fulcrum on the bottom of the tool head to extract the fastener.