Modular Fore-End Rail Bushing for Selective Heat Dissipation
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Solution Overview
Problem
Existing firearm accessories require permanent modification of the barrel nut, limiting the ability to revert the firearm to its original configuration and failing to effectively manage heat transfer between the barrel nut and hand guard, potentially causing user injury.
Innovation Solution
A modular fore-end rail assembly with arcuate bushing elements that encircle the standard barrel nut, allowing for rapid attachment and detachment without modifying the barrel nut, and enabling selective thermal conduction properties to control heat transfer between the barrel nut and hand guard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing firearm accessories are installed, then the firearm capability is upgraded, but the barrel nut requires permanent modification and cannot be returned to original configuration
Solution Approach 1:
The accessory system is divided into separate modular components: a hand guard assembly and a barrel nut interface assembly. The barrel nut interface assembly can be detached and replaced, allowing the original barrel nut to be preserved and the firearm to be returned to its original configuration if needed.
Solution Approach 2:
A detachable barrel nut interface assembly serves as an intermediary component between the original barrel nut and the hand guard. This intermediary allows accessory functionality to be added without permanently modifying the original barrel nut, enabling reversible installation.
2Device complexity
If the barrel nut is in direct contact with the hand guard, then the structure is simple, but heat transfers from the barrel nut to the hand guard causing user injury
Solution Approach 1:
A thermal interface component is introduced as an intermediary between the barrel nut and hand guard. This component controls heat transfer by selecting materials with appropriate thermal conductivity properties, reducing heat transfer to safe levels while maintaining structural integrity.
Solution Approach 2:
The thermal conductivity parameter of the interface material is changed to control heat transfer. By selecting materials with low thermal conductivity, the system reduces heat transfer from the hot barrel nut to the hand guard, preventing user injury while maintaining structural simplicity.
3Object-affected harmful factors
If bushing elements with varying thermal conductivity are used, then heat transfer is controlled, but the assembly requires multiple different components
Solution Approach 1:
The barrel nut interface assembly is designed as a universal component that can accommodate different bushing element materials. The same structural design can use different materials (aluminum, steel, polymer, ceramic) to achieve different thermal conductivity levels, allowing one design to serve multiple thermal management functions.
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
Enables rapid reconfiguration of the firearm to its original state and effectively manages heat transfer by using bushing elements with varying thermal conductivity values, reducing the risk of user injury from excessive heat.
Implementation Method 1
The thermal transfer characteristics of the material from which the bushing element members are manufactured may be selected to either increase or decrease the rate at which heat is transferred from the barrel nut to the hand guard
Data Source
AI summary
A modular fore-end rail assembly for mounting onto a firearm includes a hand guard and a bushing element that combines with an end portion of the hand guard to encircle the standard barrel nut, thereby supporting the entire assembly without requiring modification to the standard barrel nut. The thermal transfer characteristics of the material from which the bushing element is manufactured may be selected to either increase or decrease the rate at which heat is transferred from the barrel nut to the hand guard allowing for rapid changes of bushing elements and, therefore, rapid and selective changes in the heating rate of the hand guard.