Firearm Sound Suppressor With Peripheral Venting for Low Back Pressure

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Solution Overview

Problem

Existing firearm suppressors face issues such as high back pressure leading to toxic fume exposure, premature failure due to pressure and temperature differentials during high rates of fire, and inconsistent muzzle flash suppression.

Innovation Solution

A suppressor design featuring a series of cylindrical gas expansion chambers, an annular gas expansion chamber, and peripheral vents, with ledges and apertures to manage gas flow, reducing back pressure and enhancing flash and sound suppression.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional suppressors with baffles and expansion chambers are used, then muzzle blast and flash are suppressed, but back pressure increases leading to toxic fume exposure

Engineering Contradiction:

Improvetoxic fume exposureVSAvoidback pressure

Core Design Contradiction:

Object-affected harmful factorsVSStress or pressure

Solution Approach 1:

The suppressor is divided into multiple functional zones: a front portion with baffles for flash suppression, a middle portion with expansion chambers for sound attenuation, and a rear portion with peripheral vents for low-backpressure gas evacuation. This segmentation allows each zone to optimize its function while maintaining overall low back pressure to reduce toxic fume exposure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention transitions from conventional axial gas flow to a multi-dimensional flow pattern by introducing peripheral vents at the rear portion. Propellant gases are directed both axially through the expansion chambers and radially outward through the peripheral vents, creating a three-dimensional gas evacuation pathway that significantly reduces back pressure.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Object-affected harmful factors

If multi-stage suppressors with radial vents are used, then muzzle blast sound levels are reduced, but pressure and temperature differentials cause premature failure during high rates of fire

Engineering Contradiction:

Improvemuzzle blast sound levelsVSAvoidpremature failure

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

Different portions of the suppressor are designed with locally optimized properties: the front portion uses thick baffles to withstand high temperatures and pressures for flash suppression, the middle portion uses expansion chambers for sound attenuation, and the rear portion uses peripheral vents with reduced pressure differentials. Each zone is engineered to handle its specific thermal and pressure loads appropriately.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The suppressor design anticipates high-rate-of-fire conditions by incorporating a progressive gas expansion pathway. The gradual expansion through multiple chambers and the low-differential peripheral vents prepare the system to handle sustained firing by preventing sudden pressure spikes that would cause thermal shock and premature failure.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Object-affected harmful factors

If conventional suppressors are used, then flash suppression is achieved, but flash suppression is inconsistent across different firing rates

Engineering Contradiction:

Improvemuzzle flashVSAvoidflash suppression consistency

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The suppressor design achieves universal effectiveness across different firing rates by combining multiple mechanisms: the front baffles provide consistent flash blockage, the expansion chambers maintain pressure differential for flash suppression, and the peripheral vents ensure consistent gas evacuation. This multi-functional approach ensures reliable flash suppression whether firing single shots or sustained automatic fire.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250321069A1Firearm sound suppressor with peripheral venting

Publication Date: 2025.10.16 SUREFIRE LLC

AI summary

An apparatus and methods are provided for a suppressor to be coupled with a muzzle end of a barrel of a firearm to reduce muzzle blast and muzzle flash. The suppressor comprises a housing having a proximal end and a distal end. A front portion within the housing comprises a series of cylindrical gas expansion chambers for attenuating the temperature and energy of propellant gases accompanying a projectile fired from the firearm. An annular gas expansion chamber surrounds the cylindrical gas expansion chambers and directs a portion of the propellant gases from a rear portion of the suppressor to peripheral vents disposed at the distal end. Lateral chambers within the rear portion deflect and rebound a portion of the propellant gases before passing them into the annular gas expansion chamber. Ledges within the annular gas expansion chamber direct the propellant gases distally through suppressor toward the peripheral vents.