Cut-on-Contact Broadhead with Deployable Blades
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Solution Overview
Problem
Existing broadhead designs suffer from inferior aerodynamic properties due to deployable blades that can cause arrows to veer off course during flight, compromising their effectiveness.
Innovation Solution
A broadhead design featuring a ferrule with recesses and channels that retain blades in a fully retracted configuration during flight, using a frangible collar to deploy blades upon impact, creating a chisel tip with cutting edges that expand to increase cutting area and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If deployable blades are used in broadhead to increase cutting area, then cutting efficiency is improved, but aerodynamic stability deteriorates causing arrow to veer off course
Solution Approach 1:
The broadhead employs dynamically adjustable blades that can change their configuration between flight and impact phases. During flight, the blades are constrained in a streamlined position within channels to maintain aerodynamic stability. Upon impact, the blades are deployed outward to maximize cutting area. This dynamic transformation allows the broadhead to optimize its performance characteristics for each operational phase.
Solution Approach 2:
The broadhead is divided into distinct functional segments: a ferrule body for aerodynamic stability, multiple independent blades for cutting function, and a frangible collar for deployment mechanism. This segmentation allows each component to be optimized independently - the ferrule maintains streamlined shape during flight while the blades remain concealed, yet upon impact the blades can be deployed to provide maximum cutting efficiency.
2Stability of the object's composition
If blades are retained within ferrule body during flight to improve aerodynamics, then aerodynamic stability is improved, but cutting capability is reduced
Solution Approach 1:
The blades are designed to transition from a retracted state during flight to a deployed state during impact. The frangible collar acts as a deployment trigger that breaks upon impact, allowing the blades to rotate outward from their constrained positions within the ferrule channels to their full cutting position. This dynamic state change ensures optimal aerodynamics during flight and maximum cutting capability during impact.
Solution Approach 2:
The blades are pre-positioned within the ferrule body in a streamlined configuration before impact, ensuring optimal aerodynamic performance during flight. The frangible collar is pre-installed to facilitate automatic deployment upon impact. This preliminary arrangement of components ensures that the broadhead maintains superior flight characteristics while being prepared to deliver maximum cutting efficiency at the moment of impact.
Data Source
AI summary
A cut-on-contact broadhead having a plurality of deployable blades. Each of the plurality of blades is pivotally coupled to a ferrule configured for attaching the broadhead to a shaft of an arrow or a bolt. Each of the plurality of blades includes a tip, an impact region, a first cutting edge, and a second cutting edge. During flight, blades are in a fully retracted state forming a distal tip of the broadhead having sharp cutting edges defined at least in part by the first cutting edges of the blades. Upon impact, the distal tip of the broadhead creates a bore in the target. As the broadhead penetrates the target, the plurality of blades are deployed into a swept-back configuration exposing the second cutting edge of each blade. The second cutting edges expand the bore initiated by the distal tip of the broadhead and create a passage in the target.