Wedge-Shaped Demolition Tool With Integrated Nail Puller Recess
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Solution Overview
Problem
Existing demolition tools, such as nail pullers and crowbars, are inadequate for efficiently removing nails and screws from surfaces without compromising strength, causing injuries, and are not suitable for heavy loads due to weakened edges and complex handling requirements.
Innovation Solution
A wedge-shaped head tool with a keyhole-like recess for nail puller section between the front edge and handling attachment, ensuring continuous strength, easy nail and screw extraction, and safe handling with reduced risk of injury, featuring a widened circular section and tapering slot for various sizes and inclined flanks for secure grip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If slots are provided on the front edge for nail removal, then nails can be pulled out, but the front edge strength is significantly weakened and material detachment is incomplete
Solution Approach 1:
The nail puller function is extracted from the front edge area and relocated to a separate recess positioned between the front edge and the handling part attachment section. This separation allows the front edge to maintain its continuous, intact structure for strong material detachment while the relocated recess provides nail pulling capability without compromising edge strength.
2Adaptability or versatility
If goat's or cow's feet with both nail puller and crowbar are used, then multiple functions are available, but hand injury risk increases due to opposite ends positioning
Solution Approach 1:
The nail puller recess and crowbar handling part are merged into a single integrated tool structure. The recess is positioned between the front edge and the handling part attachment section, allowing both functions to be performed from the same end of the tool, eliminating the hand injury risk associated with opposite ends positioning while maintaining versatility.
3Adaptability or versatility
If the nail puller section is positioned at the opposite end from the front edge, then multiple functions are possible, but tool orientation and gripping become complex
Solution Approach 1:
The nail puller recess is preliminarily positioned in the optimal location between the front edge and handling part attachment section. This strategic placement allows nails to be levered out using the same movement direction as loosening and lifting objects, eliminating the need to grip, reorient, or turn the tool around for different functions.
4Ease of operation
If the front edge is interrupted by slits for nail removal, then nails can be accessed, but the wedging and cutting action is compromised
Solution Approach 1:
The nail puller function is extracted from the front edge and relocated to a separate recess. This extraction preserves the front edge's continuous structure, allowing it to develop full wedging and cutting action over the entire width without interruption, while the relocated recess provides nail access capability.
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 tool allows for efficient and safe removal of nails and screws with enhanced strength and durability, enabling the lifting of heavy loads without edge weakening, and provides ergonomic handling with a rolling edge for stability and versatility in demolition tasks.
Implementation Method 1
loads of one tonne and more can be lifted due to the lever ratios
Implementation Method 2
the lever ratio at the nail puller section is even higher than at the front edge and screws can therefore be easily pulled out of the material
Implementation Method 3
the front edge is not interrupted by the nail puller portion, so that it develops its wedging and cutting action over the entire width
Data Source
Figure 1~2
Figure 3~6
Figure 7~8
AI summary
The crushing tool comprises a wedge-shaped head portion (6) and an attachable handle part (4). A puller section (22), preferably circular section is provided between a continuous leading edge (14) and an opposite attachment portion (20). A keyhole-like opening is formed in widened section of the circular section and slot portion of the attachment portion.