Segmented Claw Hammer for Simultaneous Nail Removal
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Solution Overview
Problem
Conventional hammers are inefficient in simultaneously removing multiple nails from substrates like wood, as they typically have a single deep groove that can only pull one nail at a time, requiring the nail to be positioned further back in the groove for removal.
Innovation Solution
A hammer design featuring a claw portion with multiple flat-ended teeth separated by 'V'-shaped grooves, allowing for simultaneous gripping and removal of multiple nails, along with a ribbed or smooth handle and a magnetized nail groove for initial nail holding, enabling efficient removal of nails in roofing, flooring, and other construction applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single deep groove is used in conventional hammers, then the nail can be pulled out, but only one nail can be removed at a time and the groove must be very deep
Solution Approach 1:
The single deep groove is segmented into multiple shallower grooves (typically three grooves). This segmentation allows multiple nails to be engaged simultaneously while reducing the depth requirement of each individual groove, directly resolving the contradiction between productivity and device complexity.
2Ease of operation
If a single deep groove is used, then nail removal is possible, but the nail must be positioned further back in the groove for removal
Solution Approach 1:
By dividing the single deep groove into multiple shallower grooves, the nail head can be engaged closer to the hammer face, reducing the positioning distance and time required. The segmentation allows nails to be caught more easily without requiring deep insertion.
3Productivity
If multiple teeth are added to the claw portion, then multiple nails can be removed simultaneously, but the structure becomes more complex
Solution Approach 1:
The claw portion is segmented into multiple teeth (typically three) with corresponding grooves between them. This segmentation enables simultaneous engagement of multiple nails while maintaining a relatively simple overall structure that is easy to manufacture.
4Productivity
If the groove depth is reduced to accommodate multiple nails, then multiple nails can be engaged, but the gripping force on each nail may be reduced
Solution Approach 1:
The total gripping force is distributed across multiple segmented grooves rather than concentrated in a single deep groove. Each groove engages one nail, and the combined effect of all grooves provides sufficient total gripping force for multiple nails simultaneously.
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 quick and efficient removal of multiple nails from various construction materials by accommodating wider nail diameters and reducing the depth required for nail engagement, enhancing user convenience and productivity in construction tasks.
Implementation Method 1
a nail groove with a magnet positioned in the nail groove to hold a nail for initial hammering into a board
Data Source
AI summary
An apparatus including a head having a hammering portion and an oppositely arranged claw portion, the claw portion curving downwardly and away from the top side of the head toward the handle and including a back end with at least four flat ended teeth separated by at least three, substantially equal “V”-shaped grooves centered on a longitudinal axis of the head with inner edges of each of the “V”-shaped grooves being tapered along opposite sides of the “V”-shaped groove from adjacent a front of each of the at least four teeth toward a sharp notch formed at a junction of the sides of the “V”-shaped groove and from a top side of each of the at least four teeth inwardly toward a bottom side of each of the at least four teeth, the outer two of the at least four teeth having substantially equal terminal widths that are wider than the at least inner two of the at least four teeth and all of the at least four teeth being substantially equal in length.