Variable Port Multi-Piston Gas-Delayed Blowback System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Gas-delayed blowback firearm designs have fallen short in effectively managing the two primary objectives of creating a gas lock and buffering recoiling forces, particularly with high-pressure cartridges, due to the limitations of single piston designs.
Innovation Solution
A variable-port, multi-piston gas-delayed blowback system with separate locking and compression phases, utilizing differently sized gas chambers and pistons to achieve instantaneous locking and delayed unlocking, thereby reducing felt recoil and enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single piston gas delay mechanism is used, then the device complexity is reduced, but the ability to effectively manage both gas locking and recoil buffering is insufficient
Solution Approach 1:
The single piston mechanism is segmented into multiple pistons (first piston and second piston) with different functions. The first piston handles gas locking during the initial phase, while the second piston handles recoil buffering during the compression phase. This segmentation allows each piston to be optimized for its specific function, resolving the contradiction between simplicity and effectiveness.
Solution Approach 2:
The system transitions from a static single-piston design to a dynamic multi-piston system where pistons are activated in sequence based on chamber pressure phases. The variable port system dynamically adjusts gas flow to coordinate the timing of piston activation, enabling the system to adapt to different pressure conditions and achieve both gas locking and recoil buffering.
2Reliability
If a mechanical lock is used to create dwell, then the delay effectiveness is improved, but the felt recoil increases
Solution Approach 1:
The mechanical lock system is replaced with a gas-pressure-based delay system. Instead of using mechanical lugs and locks, the patent uses propellant gases to drive pistons that create the dwell period. This substitution eliminates the harsh mechanical impacts associated with traditional locking mechanisms, reducing felt recoil while maintaining delay effectiveness.
Solution Approach 2:
The patent employs pneumatic principles by using propellant gases to drive the piston mechanism. The gas pressure naturally decays over time, creating a smooth deceleration profile that reduces shock and recoil. The variable port system controls gas flow to optimize both the delay duration and the recoil characteristics.
3Device complexity
If propellant gases are compressed in a single chamber, then the system simplicity is maintained, but the recoil buffering effectiveness is reduced
Solution Approach 1:
The single gas chamber is segmented into multiple chambers (first gas chamber and second gas chamber) with different volumes and functions. The first chamber handles initial gas compression for locking, while the second chamber handles subsequent compression for recoil buffering. This segmentation allows for optimized compression ratios and timing, improving recoil management.
Solution Approach 2:
The gas compression occurs in periodic phases corresponding to different stages of the firing cycle. The first phase compresses gases for immediate locking, followed by a second phase that continues compression for recoil buffering. This periodic action allows the system to manage different aspects of recoil at appropriate times in the cycle.
4Weight of moving object
If a larger piston diameter is used, then the slide inertia is reduced, but the recoil buffering capacity is insufficient for high-pressure cartridges
Solution Approach 1:
The recoil buffering function is segmented from the slide mass reduction function by using separate pistons. The first piston can be larger for initial locking without significantly increasing slide mass, while the second piston provides additional buffering force. This segmentation allows optimization of each piston's size for its specific function.
Solution Approach 2:
The system merges the functions of multiple pistons with different characteristics into a unified recoil management system. The first piston with optimized diameter provides initial locking, while the second piston adds buffering capacity. Together, they achieve both slide mass reduction and sufficient recoil buffering for high-pressure cartridges.
Data Source
AI summary
A gas-delayed blowback system for a firearm preferably includes a receiver, a barrel and a spring-loaded moveable slide. The barrel is ported to at least two gas compression chambers into which expanding propellant gases flow after the firearm is fired. The gas compression chambers and ports vary in volume such that propellant gas pressure increases rapidly in one of the chambers, thereby locking the slide upon firing. Pressure in the other gas compression chambers increases and decreases at a slower rate due to a smaller port size, further delaying rearward travel of the slide after the bullet exits the barrel and barrel pressure is relieved.