Switch-Type Gas Block Regulator for Firearm Piston Assembly
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Solution Overview
Problem
Existing semi-automatic firearms face challenges with gas block regulators that are difficult to adjust between suppressed and unsuppressed operations, leading to excessive wear or insufficient gas pressure, and gas piston assemblies are sensitive to angular or concentricity deviations between the gas block and upper receiver hole, causing fluctuations in backflow pressure.
Innovation Solution
A switch-type adjustable gas block regulator and a gas piston assembly with an elongated intermediate rod that is less sensitive to angular or concentricity deviations, featuring a modular design with a regulator that changes backflow pressure based on operational mode and includes a piston assembly with a spring for reliable operation without excessive wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gas block is tuned for unsuppressed operation, then the gas pressure is sufficient for reliable operation during unsuppressed firing, but the gas pressure causes excessive force on the bolt carrier group during suppressed operation, resulting in excessive wear
Solution Approach 1:
The gas block incorporates an adjustable rotary regulator that allows the user to dynamically change the gas pressure settings between suppressed and unsuppressed modes. This dynamic adjustment capability enables the gas block to adapt to different operating conditions, preventing excessive force on the bolt carrier group during suppressed operation while maintaining reliable operation during unsuppressed firing
Solution Approach 2:
The rotary regulator changes the gas pressure parameter by rotating to different positions that correspond to different orifice openings. This parameter change allows the gas block to reduce backflow pressure during suppressed operation, preventing excessive wear, while maintaining sufficient pressure during unsuppressed operation for reliable cycling
2Object-generated harmful factors
If the gas block is tuned for suppressed operation, then the back flow pressure is reduced to prevent excessive wear, but the gas pressure is insufficient to enable the gas piston to reliably act upon the bolt carrier group during unsuppressed operation
Solution Approach 1:
The adjustable rotary regulator provides dynamic adjustment capability, allowing the user to switch between suppressed and unsuppressed settings. When set to unsuppressed mode, the regulator opens the gas passage fully to provide sufficient gas pressure for reliable bolt carrier group operation, while in suppressed mode it restricts the passage to reduce backflow pressure and prevent excessive wear
Solution Approach 2:
The gas block with adjustable regulator serves multiple functions: it operates effectively in both suppressed and unsuppressed modes, and can be tuned to match different suppressor configurations. This multi-functionality eliminates the need for separate gas blocks for different operating conditions
3Adaptability or versatility
If a rotary-type gas regulator is used to adjust back flow pressure, then the gas pressure can be changed between suppressed and unsuppressed settings, but the regulator is difficult to change between settings
Solution Approach 1:
The patent replaces the traditional rotary-type gas regulator with a push-button or switch-type adjustable gas block regulator. This substitution changes the adjustment mechanism from a rotary motion requiring multiple turns to a simple linear push or switch action, making it easier and faster to change between suppressed and unsuppressed settings while maintaining adaptability
4Strength
If the gas piston assembly has a sufficient length-to-diameter ratio to resist longitudinal loads, then the assembly can handle excessive loads without exceeding flexure limits, but this requirement poses challenges with rifles firing higher caliber cartridges that require a longer distance between the upper receiver and the orifice
Solution Approach 1:
The gas piston assembly is segmented into distinct components: a piston, an intermediate rod, and a rear portion. This segmentation allows each component to be optimized independently - the piston can be designed with appropriate length-to-diameter ratio for strength, while the intermediate rod can be made longer to accommodate the increased distance required by higher caliber cartridges without compromising structural integrity
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
The solution provides a more ergonomic and reliable adjustment of backflow pressure between suppressed and unsuppressed operations, reducing wear and sensitivity to angular or concentricity deviations, ensuring accurate and efficient cycling of the bolt carrier group.
Implementation Method 1
A switch-type adjustable gas block regulator and a gas piston assembly with an elongated intermediate rod that is less sensitive to angular or concentricity deviations, featuring a modular design with a regulator that changes backflow pressure based on operational mode and includes a piston assembly with a spring for reliable operation without excessive wear.
Data Source
AI summary
Firearms with gas piston assemblies have a receiver defining a passage receiving a reciprocating bolt assembly, a barrel defining a barrel axis and extending from the receiver in a forward direction and defining a barrel gas aperture, a gas block connected to the barrel and defining a piston bore in communication with the gas block bore, a piston assembly having a forward end operably engaged to the piston bore and a rear end operably engaged to the reciprocating bolt assembly, the piston assembly having a piston closely received in the piston bore and having a piston rear end, the piston assembly including an elongated intermediate rod having an intermediate rod forward end registered with the piston rear end and an intermediate rod rear end, and the piston assembly including a rear portion having a forward end registered with the intermediate rod rear end and a rear portion.