Firearm Gas Port Positioning for Reliable Cycling
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Solution Overview
Problem
High-pressure cycling in firearms for long-range ammunition poses challenges in maintaining accuracy and reliability while managing component wear, as existing systems struggle to balance dwell time and pressure distribution effectively.
Innovation Solution
The design positions a gas port along the barrel to provide optimal dwell time for gas management, using a short stroke piston gas system that includes a gas block, gas piston, and operation rod to ensure reliable cycling without compromising accuracy, and incorporates a bolt assembly with a case extractor for efficient extraction and ejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy steel material is used to withstand high pressures, then reliability is improved, but weight increases
Solution Approach 1:
The patent employs composite material construction in the firearm components, combining different materials with complementary properties to achieve both high strength for withstanding 50,000+ psi pressures and reduced weight. The receiver and barrel assemblies use material compositions that provide necessary structural integrity while being lighter than traditional all-steel constructions.
2Reliability
If dwell time is increased to enable proper cycling, then reliability is improved, but accuracy deteriorates due to barrel movement
Solution Approach 1:
The gas-operated cycling system uses dynamic timing where the gas port positioning and bolt movement are synchronized to achieve optimal dwell time. The system dynamically balances the duration of pressure application on the bolt against barrel stability, allowing sufficient time for reliable extraction and ejection while minimizing barrel movement that would degrade accuracy.
Solution Approach 2:
The patent optimizes the dwell time parameter by precisely positioning the gas port along the barrel and adjusting the bolt carrier group mass and spring characteristics. These parameter changes allow the system to achieve the minimum necessary dwell time for reliable cycling without excessive dwell time that would cause barrel movement and accuracy degradation.
3Measurement precision
If dwell time is decreased to maintain accuracy, then accuracy is improved, but cycling reliability deteriorates
Solution Approach 1:
The system adjusts multiple parameters including gas port diameter and position, bolt carrier mass, and recoil spring characteristics to achieve the minimum dwell time necessary for reliable cycling. By optimizing these parameters, the patent maintains accuracy while ensuring sufficient time for complete extraction and ejection cycles.
4Reliability
If gas port position is optimized for cycling, then reliability is improved, but accuracy may be compromised due to barrel movement
Solution Approach 1:
The gas port is positioned at a specific location along the barrel where the pressure distribution and dwell time characteristics are optimal for cycling reliability. This localized optimization of the gas port position ensures reliable operation while minimizing negative impacts on accuracy through careful selection of the port's longitudinal location.
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
This configuration allows firearms to withstand high pressures of over 50,000 psi while maintaining low weight and ensuring reliable, accurate cycling, reducing component damage and improving the consistency of long-range ammunition firing.
Implementation Method 1
pressure generated by the firing of the ammunition is used to perform the cycling operation. A gas port is located in the barrel to communicate the pressure to a bolt
Implementation Method 2
High pressures (e.g., more than 50,000 psi (344.7379 mpa)) generated upon firing long-range ammunition
Implementation Method 3
a projectile travels through a barrel of the firearm to exit the barrel at speeds of over 2,500 ft/s
Data Source
AI summary
Embodiments of the disclosure relate to semi-automatic, automatic, and bolt-action firearms and components for such firearms.