Rear Deploying Broadhead with Latex Retention
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Solution Overview
Problem
Existing broadheads with fixed blades suffer from reduced accuracy and velocity due to wind resistance, and blade-opening designs are often complex and unreliable, with issues of premature opening or failure to open properly.
Innovation Solution
A rear-deploying broadhead design featuring a piston or plunger mechanism within the broadhead body, where the blades are retracted and retained in recesses during flight, covered by an external latex coating that deploys the blades upon impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If blades are fixed in an open position on the broadhead, then cutting area is maximized, but wind resistance increases causing reduced accuracy and velocity
Solution Approach 1:
The broadhead blades are designed to transition from a retracted position during flight to an deployed position upon impact. The blades are held in a retracted state by a flexible band or coating during flight to minimize wind resistance, then automatically deploy to the open position upon impact to maximize cutting area. This dynamic state change allows the system to optimize for different operational phases.
2Measurement precision
If blades are retracted during flight to reduce wind resistance, then accuracy and velocity improve, but blade deployment reliability must be ensured upon impact
Solution Approach 1:
The blades are pre-positioned in a retracted state during flight, ready to deploy upon impact. The flexible band or coating is pre-tensioned to ensure automatic deployment when impact forces are applied. This preliminary positioning and pre-tensioning ensures that when the arrow strikes the target, the blades will reliably deploy to the open position without requiring additional mechanical complexity.
3Reliability
If a mechanical blade-opening mechanism is used, then blade deployment is achieved, but device complexity and reliability issues arise
Solution Approach 1:
The invention extracts the blade-opening function from complex mechanical mechanisms and implements it through simpler means. Instead of using springs, cams, or levers, the patent employs a flexible band or external coating that passively allows blades to deploy upon impact. This eliminates complex mechanical components while maintaining reliable blade deployment functionality.
4Object-affected harmful factors
If blade surface area is reduced to minimize wind effects, then steering effects are reduced, but cutting area within target is reduced
Solution Approach 1:
The blade surface area is dynamically adjusted based on operational requirements. During flight, blades are retracted to minimize wind resistance and steering effects. Upon impact, blades deploy to maximize cutting area. This dynamic adjustment allows the system to optimize for aerodynamic performance during flight and cutting performance upon impact, resolving the contradiction between reduced wind effects and adequate cutting area.
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 enhances accuracy and velocity by minimizing wind resistance during flight while ensuring reliable blade deployment upon impact, resulting in effective penetration and cutting performance.
Implementation Method 1
The blades are retained in place by an external coating of latex or similar material
Data Source
AI summary
The present invention is a rear-deploying broadhead with a body that is attachable to an arrow shaft. It has a body attachable to an arrow shaft by any manner known in the art, and has an outer housing, an inner spine, and at least two blades pivotally attached to the inner spine, with the inner spine having a first end with a plunger end, and a second end which is pointed. The broadhead has an external coating of thermoplastic or similar material having an impact value allowing said coating to retain until the broadhead impacts a target, at which point the blades deploy through the external coating.