Self-Centering Arrowhead Blade Assembly for Accuracy and Penetration
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Solution Overview
Problem
Current arrowhead point blades are typically wider than the arrowhead body, reducing kinetic energy and are prone to damage upon impact, leading to reduced accuracy and penetration.
Innovation Solution
An arrowhead point blade configuration featuring a first and second blade with an interference fit, where the first blade is partially aligned with the second blade, creating a self-centering mechanism that maintains kinetic energy and reduces runout during flight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If current point blades are made wider than the arrowhead body, then cutting capability is improved, but kinetic energy is reduced and accuracy deteriorates
Solution Approach 1:
The point blade is divided into multiple segments (first point blade and second point blade) that can be independently positioned and centered. This segmentation allows each blade segment to be optimized for cutting while maintaining a streamlined overall profile that reduces drag and preserves kinetic energy during flight.
Solution Approach 2:
The first point blade is nested within or adjacent to the second point blade, with both blades positioned within the confines of the arrowhead body. This nested arrangement allows the blades to provide cutting capability while maintaining a compact profile that does not exceed the arrowhead body width, thereby preserving kinetic energy.
2Strength
If point blades are made wider than the arrowhead body, then cutting performance is enhanced, but aerodynamic drag increases reducing flight accuracy
Solution Approach 1:
The point blade structure implements local quality by concentrating cutting functionality at the tip region where the blades are positioned, while the main body of the arrowhead maintains a streamlined, narrow profile for optimal aerodynamics. The self-centering mechanism ensures proper alignment of these local cutting elements without compromising overall flight stability.
Solution Approach 2:
The self-centering mechanism introduces dynamic adjustment capability that allows the point blades to automatically align themselves during flight. This dynamic self-centering ensures optimal blade positioning relative to the arrow shaft, maintaining flight accuracy while preserving cutting performance.
3Speed
If point blades are positioned at the end of the arrowhead, then initial contact with target is achieved, but blade damage occurs reducing penetration
Solution Approach 1:
The self-centering mechanism and interference fit arrangement provide beforehand cushioning by ensuring proper blade alignment and positioning before target impact. This pre-alignment prevents blade deflection or damage upon initial contact, preserving penetration capability. The structured support from the arrowhead body also provides mechanical cushioning against impact forces.
Data Source
AI summary
Disclosed technology includes an arrowhead point blade configuration having a first point blade and a second point blade. The first blade may include a tip and a base. A coupling aperture may be defined within the first blade adjacent to the base. A slot may extend up from the coupling aperture towards the tip. The second blade may include a tip and a base. A coupling aperture may be defined within the second blade adjacent to the base. A slot may extend down from the tip and may be separate from the coupling aperture. The first blade slot may be positioned within the second blade slot, partially aligning the coupling apertures. The size and shape of the blade slots and coupling apertures may be such that a fastener inserted through the coupling apertures pulls the first blade downwards into the second blade creating an interference fit and centering the blades.