Fixed Parallel-Blade Broadhead H-Shaped Configuration
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Solution Overview
Problem
Existing broadheads face challenges in maintaining accurate arrow flight and humane killing due to aerodynamic issues and structural weaknesses, often resulting in wounded rather than killed targets, as they are affected by wind pressure and have reduced penetration and expandable blade reliability.
Innovation Solution
A broadhead design with a smoothly shaped leading edge and trailing surfaces to minimize aerodynamic drag, combined with a modified H-shaped blade configuration for enhanced cutting and hemorrhaging, and made from materials like titanium for strength and weight optimization, which also imparts rotation to the arrow for improved flight dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the broadhead is designed with a larger blade size and arrangement to ensure efficient killing, then the cutting width and damage area are improved, but the aerodynamic drag increases and flight accuracy deteriorates
Solution Approach 1:
The patent applies curvature by rounding the leading edges of the blades and optimizing the overall blade contour to be more aerodynamic. This curved design reduces air turbulence and drag while maintaining the necessary blade area for effective cutting, thus resolving the contradiction between large cutting width and flight accuracy.
Solution Approach 2:
The patent changes geometric parameters of the blade configuration, specifically optimizing the angle and curvature of blade edges. By adjusting these parameters, the broadhead achieves a balance between maintaining sufficient cutting area and minimizing aerodynamic resistance, thereby preserving flight accuracy while ensuring effective killing capability.
2Speed
If the overall cutting width is reduced to maintain narrow aerodynamic profile, then flight accuracy is improved, but the ability to ensure humane killing deteriorates
Solution Approach 1:
The patent transitions from a two-dimensional view of blade width to a three-dimensional configuration by optimizing blade angle, curvature, and depth. This dimensional approach allows the broadhead to present a narrow profile to the wind (maintaining flight accuracy) while maintaining sufficient cutting capacity through optimized spatial arrangement of blade edges.
3Area of stationary object
If mechanical broadheads with expandable blades are used to provide large contact area, then the damage area is improved, but penetration capability and structural reliability deteriorate
Solution Approach 1:
The patent extracts the expandable mechanism from the broadhead design, using only the fixed blade configuration. This eliminates the structural weaknesses and reliability issues associated with moving parts and expansion mechanisms, while maintaining effective damage area through optimized fixed blade geometry and arrangement.
4Stability of the object's composition
If the broadhead blades are designed with angled configuration to provide lift, then the flight dynamics are changed, but the arrow may fly off course
Solution Approach 1:
The patent employs asymmetric blade configuration where the blades are angled relative to the arrow shaft, creating differential aerodynamic forces. This asymmetric design generates controlled lift and rotational stability that keeps the arrow on course, transforming what could be a destabilizing factor into a stabilizing mechanism for accurate flight.
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 design reduces air turbulence and wind noise, ensures humane killing by creating a larger wound channel, and maintains accurate arrow flight while being structurally robust and silent in flight, addressing the limitations of prior broadheads.
Implementation Method 1
The present invention is directed to a broadhead designed to have a reduced aerodynamic drag, thereby decreasing the air turbulence and wind noise generated during flight
Implementation Method 2
The geometric configurations may also be shaped to impart rotation of the arrow during flight to enhance the flight dynamics
Data Source
AI summary
A broadhead which is light in weight and which has surface area to decrease arrowhead weight, surface area and drag to increase performance of an arrow to which it is attached. The broadhead attaches to the arrow in one of the known ways, glue, screw, friction or interference fit. A broadhead wrench may need to be used to protect the user from sharp edges while handling the broadhead. The blade portion of the broadhead aids in the hemorrhaging of the target by creating a larger conduit for bleeding to occur, thus speeding death of a game animal.