Suppressor Front Plate Bore Geometry for Flash and Back Pressure

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Solution Overview

Problem

Existing firearm sound suppressors face issues such as high back pressure leading to health risks, premature failure due to temperature and pressure differences, and inconsistent muzzle flash suppression, especially during high rates of fire and elevated temperatures.

Innovation Solution

A diverging central bore design for firearm sound suppressors, featuring a curvature profile that controls the expansion of propellant gases, reducing back pressure and minimizing muzzle flash by allowing controlled gas expansion and reducing turbulence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional suppressor designs are used, then muzzle flash and blast are suppressed, but back pressure increases leading to health risks and potential failure

Engineering Contradiction:

Improvemuzzle flash and blast suppressionVSAvoidback pressure and toxic fumes

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The suppressor is divided into multiple chambers (first chamber, second chamber, third chamber) with distinct functions. The first chamber handles initial gas expansion, the second chamber provides additional suppression, and the third chamber manages final gas exit. This segmentation allows each chamber to be optimized for specific pressure and temperature conditions, reducing overall back pressure while maintaining flash and blast suppression effectiveness.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If multi-stage suppressors with radial vents are used, then muzzle blast sound levels are reduced, but structural failure occurs due to sustained high pressure and temperature during automatic fire

Engineering Contradiction:

Improvemuzzle blast sound levelsVSAvoidstructural integrity under sustained firing

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

Different chambers are designed with locally optimized properties: the first chamber has a specific volume and configuration for initial gas capture, the second chamber provides intermediate cooling and pressure reduction, and the third chamber is designed for controlled gas discharge. Each chamber's geometry, volume, and positioning are specifically tailored to handle local pressure and temperature conditions, preventing structural failure during sustained automatic fire while maintaining effective blast suppression.

Inventive Principle:

Principle #3Local quality

3Productivity

If suppressors operate during sustained automatic fire, then continuous suppression is achieved, but temperature and pressure differences cause premature failure

Engineering Contradiction:

Improvecontinuous suppression capabilityVSAvoidtemperature and pressure fluctuations

Core Design Contradiction:

ProductivityVSTemperature

Solution Approach 1:

The suppressor maintains continuous suppression capability through sustained automatic fire by providing continuous gas flow management across all three chambers. The design ensures uninterrupted cooling and pressure reduction throughout the firing sequence, preventing thermal buildup and pressure spikes that would cause premature failure, thereby enabling prolonged operational reliability.

Inventive Principle:

Principle #20Continuity of useful action

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 design effectively suppresses muzzle blast and flash, reduces health risks from toxic fumes, and prevents premature suppressor failure by managing pressure and temperature fluctuations during sustained firing.

Implementation Method 1

Methodology Applied

Scientific EffectGas expansion:

Implementation Method 2

The curvature profile is configured to provide a cross-sectional area of the central bore that is proportional to a distance along the diverging portion and to allow for more controlled expansion of high-pressure propellant gases exiting of the suppressor through the central bore. The curvature profile provides an included angle of the central bore that decreases secondary flash events accompanying the expulsion of propellant gases

Methodology Applied

Scientific EffectTurbulence reduction: Turbulence

Data Source

PatentUS12595983B2Diverging central bore for firearm sound suppressor

Publication Date: 2026.04.07 SUREFIRE LLC

AI summary

An apparatus and methods are provided for a front plate having a diverging central bore for firearm sound suppressors that improves noise and flash characteristics during firing a weapon. The central bore is disposed between a back surface and a front surface of the front plate. An untapered portion of the central bore extends from the back surface to a diverging portion that opens toward the front surface. The diverging portion includes a curvature profile configured to allow for more controlled expansion of high-pressure propellant gases exiting of the suppressor through the central bore. The curvature profile provides an included angle of the central bore that decreases secondary flash events accompanying the expulsion of propellant gases accompanying a fired bullet exiting the suppressor through the central bore. The curvature profile exhibits a cross-sectional area of the central bore that is proportional to a distance along the diverging portion.