Dimpled Firearm Barrel Heat Dissipation and Recessed Crown Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Firearms barrels, particularly in semiautomatic pistols, face issues with heat deformation, frictional engagement with the slide, and turbulence at the barrel exit, affecting accuracy and performance.
Innovation Solution
The barrel features a dimpled surface for enhanced heat dissipation and reduced friction, along with a recessed barrel exit design that includes an angled cylindrical ring and a circular pocket to minimize turbulence and protect the crown surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the barrel surface is made smooth, then friction with the slide is reduced, but heat dissipation is decreased
Solution Approach 1:
The barrel surface is given different local qualities: the outer surface has dimples for heat dissipation while the inner bore remains smooth for reduced friction. This local differentiation allows each surface to optimize its function independently.
Solution Approach 2:
The barrel surface is segmented into two distinct surfaces: the outer surface with dimples and the inner bore without dimples. This segmentation allows the outer surface to maximize heat dissipation while the inner surface maintains low friction for bullet passage.
2Ease of manufacture
If the barrel exit is flat and direct, then manufacturing is simple, but gas turbulence affects accuracy
Solution Approach 1:
The flat barrel exit is replaced with a crowned exit featuring curved surfaces. The crown creates a rounded transition that smooths gas flow and reduces turbulence, improving accuracy while remaining manufacturable through standard machining operations.
Solution Approach 2:
The barrel exit geometry is changed from a flat perpendicular end to a crowned configuration with specific angular parameters. The crown angle and radius are optimized to control gas expansion and minimize turbulence, directly improving ballistic performance.
3Speed
If the crown surfaces are exposed, then gas flow is direct, but the crown is susceptible to damage
Solution Approach 1:
The crown surfaces are recessed below the barrel outer surface, creating a protective recess that cushions them against physical damage. This recess acts as a pre-established protective barrier while the crown geometry still allows proper gas flow for accuracy.
Solution Approach 2:
The crown is nested within a recessed cavity in the barrel. This nesting arrangement protects the critical crown surfaces from external damage while maintaining the necessary gas flow path for accurate bullet exit.
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 dimpled surface improves heat dissipation and reduces friction, while the recessed barrel exit design enhances accuracy by smoothing gas flow and protecting the crown from damage, leading to improved firearm stability and accuracy.
Implementation Method 1
The outer surface of the barrel is covered by a plurality of indentations or dimples that are arranged in offsetting columns or rows extending down the length of the barrel... the dimpled surface improves heat dissipation
Implementation Method 2
The dimples can be of varying depths but in some non-limiting embodiments, the depths are 0.015 inches and the diameters are in these non-limiting examples 0.375 inches with the center of the dimples being in these examples 0.250 inches apart... reduced friction
Implementation Method 3
A circular pocket is then formed so as to have a wider diameter than the cylindrical ring which further recesses the cylindrical ring. The cylindrical ring is preferably angled so as to provide a smooth gas flow path of the gasses to reduce turbulence at the barrel end atmosphere interface
Data Source
AI summary
A semiautomatic pistol having a barrel with an exterior surface that has a plurality of indentations and dimples to dissipate heat and reduce frictional engagement between the barrel and the slide. The barrel component includes a crown portion that is recessed to protect the crown portion by a pocket.