Mechanical Broadhead Rearward Deploying Blades
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Solution Overview
Problem
Mechanical broadheads, particularly rearward deploying and sliding blade types, face issues with complex designs and irregular deployment, leading to reduced kinetic energy for target penetration and cutting efficiency.
Innovation Solution
A mechanical broadhead design featuring a ferrule with slots and a common connector body, such as a carriage element or pin, that allows blades to move together rearwardly as a unit, optionally pivoting relative to each other, to achieve a larger cutting diameter and simplify the mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common connector body is used to link blades, then the structure is simplified and blades move together as a unit, but the design complexity may increase due to the need for precise alignment and movement control
Solution Approach 1:
The patent merges multiple blades into a single integrated assembly that moves together as one unit through the common connector body. This combining approach simplifies the overall structure by eliminating independent blade mechanisms and ensures uniform deployment, directly addressing the complexity reduction goal while requiring precise manufacturing of the connector body to maintain alignment.
2Reliability
If blades are connected to move together as a unit, then consistent deployment is achieved, but kinetic energy for penetration may be reduced due to the additional mass and complexity of the connection mechanism
Solution Approach 1:
The connector body is designed with segmented or modular components that allow the blades to move together while minimizing the mass of the connection mechanism. The segmentation enables precise control of blade deployment while keeping the additional mass to a minimum, thus preserving kinetic energy for penetration while achieving consistent deployment.
3Device complexity
If a common connector body is used, then the mechanism is simplified, but the cutting diameter may be limited by the space required for the connector and blade movement
Solution Approach 1:
The connector body is designed to allow blades to move in multiple dimensions - both together as a unit and with relative movement capability. This multi-dimensional movement enables the blades to achieve a larger cutting diameter when deployed while the connector body remains compact, resolving the contradiction between mechanism simplicity and cutting area.
Data Source
AI summary
A mechanical broadhead including rearwardly deploying and/or sliding blades. The broadhead includes a ferrule defining a bore joined with a penetrating tip. A connector body, such as a carriage element or a pin, is slidably and moveably disposed within the bore, distal from the tip. One or more cutting blades is joined with the connector body. The connector body moves together in unison with the cutting blades as they expand from a retracted, in flight mode to a deployed, target penetrating mode. The connector body and blades can be joined with the ferrule so that the broadhead converts from a deployed mode to an unbarbed mode to facilitate broadhead removal. Optionally, the broadhead can include an internal retainer element that is resilient and durable enough to be used for multiple deployments. A related method of operating the broadhead also is provided.