Firearm Sound Suppressor with Expansion Chamber Vanes
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Solution Overview
Problem
Traditional sound suppressors for firearms are limited in their ability to effectively reduce the sound generated by muzzle blasts, as they primarily focus on decelerating combustion gases rather than addressing the shockwaves and mechanical noise, leading to incomplete noise suppression and undesirable side effects like backpressure and heat mirage, which can pose health risks to frequent shooters.
Innovation Solution
The proposed sound suppressor utilizes a hollow elongated body with an expansion chamber and vanes, manufactured using additive manufacturing, incorporating porous baffle-like structures and a double-wall vacuum-sealed design to slow down gases, change their vector, and dissipate energy, while also using anechoic cones to absorb sound waves, thereby reducing noise and heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional baffle and expansion chamber designs are used to decelerate combustion gases, then gas velocity is reduced, but sound suppression is incomplete and backpressure increases
Solution Approach 1:
The suppressor is divided into multiple functional sections: an expansion chamber with radially extending vanes for initial gas decomposition, followed by a series of progressively smaller expansion chambers with conical surfaces. This segmented approach allows staged deceleration and expansion of combustion gases, reducing both velocity and sound pressure effectively while managing backpressure through controlled flow paths.
Solution Approach 2:
The invention introduces radial expansion dimension by incorporating vanes that extend radially from the central axis, creating three-dimensional flow patterns. The conical surfaces of successive expansion chambers add axial dimension changes, guiding gases through a complex multi-dimensional path that increases residence time and expansion volume without simply lengthening the suppressor linearly.
2Object-generated harmful factors
If suppressor length is increased to improve sound suppression, then noise reduction is enhanced, but device complexity and size increase
Solution Approach 1:
Multiple expansion chambers are nested concentrically around the central projectile path, with each chamber containing conical surfaces and vanes. This nested configuration allows multiple sound-suppression stages to be packed into a compact cylindrical form factor, achieving extended suppression performance without linearly increasing overall suppressor length or external dimensions.
Solution Approach 2:
The suppressor employs conical surfaces and curved flow paths within the expansion chambers instead of straight cylindrical passages. These curved geometries promote turbulent mixing and enhanced expansion of combustion gases, improving sound suppression efficiency within a more compact volume compared to linear rectangular or simple cylindrical designs.
3Manufacturing precision
If additive manufacturing is used to create complex internal structures, then manufacturing precision and structural integrity are improved, but manufacturing cost and complexity increase
Solution Approach 1:
The suppressor integrates multiple components that would traditionally require separate manufacturing and assembly into a single monolithic structure. The expansion chambers, vanes, conical surfaces, and connecting passages are all formed as one continuous piece through additive manufacturing, eliminating welding, sealing, and assembly operations while achieving complex internal geometries that are impossible with traditional subtractive manufacturing.
Solution Approach 2:
Additive manufacturing enables realization of complex internal geometries with optimized wall thicknesses, surface finishes, and structural densities that cannot be achieved through conventional machining or casting. The manufacturing process parameters (layer height, infill density, support structures) can be adjusted to optimize both structural integrity and acoustic performance for specific application requirements.
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 design significantly reduces the noise generated by firearms, enhances structural integrity, and minimizes backpressure and heat-related issues, providing a more effective and safer suppression solution compared to traditional methods.
Implementation Method 1
an expansion chamber disposed within the body. The expansion chamber may extend from adjacent the proximal end to a position between the proximal and distal ends. The suppressor may include a first plurality of vanes disposed in the expansion chamber
Implementation Method 2
The unitary monolithic suppressor may also include porous baffle-like structures comprising of mesh-like patterns
Implementation Method 3
incorporating porous baffle-like structures and a double-wall vacuum-sealed design to slow down gases, change their vector, and dissipate energy, while also using anechoic cones to absorb sound waves
Implementation Method 4
a double-wall vacuum-sealed design to slow down gases, change their vector, and dissipate energy
Data Source
AI summary
A suppressor for a firearm is disclosed. The suppressor may have a hollow elongated body extending from a proximal end to a distal end. The suppressor may also have an expansion chamber disposed within the body. The expansion chamber may extend from adjacent the proximal end to a position between the proximal and distal ends. The suppressor may have a first plurality of vanes disposed in the expansion chamber. The first vanes may be laterally spaced apart from each other along a periphery of the body. The suppressor may further have a second plurality of vanes disposed in the body. The second plurality of vanes may be axially spaced apart from the first vanes. The tips of the first and second plurality of vanes may define a generally cylindrical passageway disposed coaxially with the body.