Hammer Accessory with Friction Members for Nail Removal
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Solution Overview
Problem
Claw-hammers often struggle to remove stubborn nails without damaging the surface, requiring additional leverage and protection to prevent material marring, especially when dealing with finish trim.
Innovation Solution
A slip-on hammer accessory with a non-planar central wall and equidistantly offset planar lateral walls, featuring friction-inducing members and a curvilinear design that allows the hammer to rock and provide increased leverage while protecting the surface from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a claw-hammer is used to pull stubborn nails, then the nail can be removed, but the surface material is damaged and marred
Solution Approach 1:
The patent introduces a piece of wood-scrap as an intermediary element placed between the hammer's claw and the surface material. This intermediary provides the necessary leverage for removing stubborn nails while preventing direct contact between the hammer and the finished material, thereby avoiding surface damage and marring.
Solution Approach 2:
The patent employs a disposable wood-scrap piece that is inexpensive and easily replaceable. This temporary sacrificial element absorbs the mechanical stress and potential damage, allowing the expensive finished material to remain intact. The wood-scrap serves its purpose and can be discarded after use.
2Force
If additional leverage is applied to remove stubborn nails, then the nail can be pulled out, but the surface material is more likely to be damaged
Solution Approach 1:
The wood-scrap acts as a mediator that transmits and distributes the prying force. It provides the necessary leverage multiplication to remove stubborn nails while its sacrificial nature ensures that any excessive force or surface contact does not damage the finished material.
Solution Approach 2:
The patent changes the physical parameters of the interaction by introducing a material with different mechanical properties (wood-scrap) between the hammer and the finished material. This parameter change allows for higher forces to be applied without reaching the damage threshold of the finished material.
3Ease of operation
If a piece of wood-scrap is placed beneath the hammer's head for leverage, then stubborn nails can be removed, but the process becomes more complex and time-consuming
Solution Approach 1:
The wood-scrap is a simple, inexpensive, and readily available material that requires minimal preparation. Its simplicity and ease of acquisition offset the additional step of placement, making the overall process still very straightforward and quick for removing stubborn nails.
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 accessory effectively increases leverage for nail removal while preventing surface damage, making it easier and safer for carpenters to pull nails without marring the material.
Implementation Method 1
each of the first lateral wall section and the second lateral wall section is provided with a plurality of friction-inducing members extending towards the centrally registered longitudinal axis
Data Source
AI summary
A hammer accessory is capable of being affixed to a head of a hammer and configured to increase leverage for effectively removing nails from a surface while protecting the surface from being damaged. The hammer accessory includes a body having a central wall section, a first lateral wall section affixed to a first side of the central wall section, and a second lateral wall section affixed to a second side of the central wall section. Notably, the first lateral wall section and the second lateral wall section are equidistantly and oppositely offset from the centrally axis. Each of the first lateral wall section and the second lateral wall section is provided with friction-inducing members extending towards the centrally registered longitudinal axis.