Internal Barrel Threading for Accessory Mounting

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Solution Overview

Problem

Existing firearm accessory mounting systems require external barrel threading, which is expensive and complicated, often necessitating the replacement of the entire barrel, disrupting the firearm's performance and requiring substantial expenditure.

Innovation Solution

A mounting system that threads accessories to the interior of the barrel using female threads, with an indexing feature for rotational alignment and a locking mechanism involving a tensioning spring to secure the accessory without altering the outer barrel surface, allowing for easy removal and installation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If external barrel threading is used to mount accessories, then accessories can be mounted on the barrel, but it requires expensive and complicated machining and often necessitates replacement of the entire barrel

Engineering Contradiction:

Improveaccessory mounting processVSAvoidbarrel modification complexity

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The mounting system nests the accessory within the barrel structure by creating internal female threads inside the barrel bore. This allows the accessory to be mounted internally rather than requiring external threading, eliminating the need to machine the outside of the barrel and avoiding the need to replace the entire barrel assembly.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

Instead of the conventional approach of threading the exterior of the barrel to mount accessories, this invention inverts the approach by threading the interior surface of the barrel. The female threads are created on the inner surface of the barrel bore, allowing accessories to be mounted from the inside out, which simplifies the manufacturing process and avoids complex external modifications.

Inventive Principle:

Principle #13The other way round (Inversion)

2Adaptability or versatility

If external threading is applied to the barrel, then accessories can be mounted, but it disrupts the firearm's performance and requires substantial expenditure

Engineering Contradiction:

Improveaccessory mounting capabilityVSAvoidfirearm performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

By nesting the accessory mounting system within the existing barrel interior, the external dimensions and surface of the barrel remain unchanged. This preserves the original firearm performance characteristics while adding accessory mounting capability, as the barrel's external geometry and material properties are not altered.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The inversion of the threading approach (internal vs. external) ensures that the barrel's external surface and structural integrity are maintained. Since the threading is created inside the barrel bore using conventional boring and threading operations, the external dimensions and performance characteristics of the barrel are preserved while still enabling accessory mounting.

Inventive Principle:

Principle #13The other way round (Inversion)

3Adaptability or versatility

If the barrel is threaded externally to mount accessories, then accessories can be installed, but it requires replacement of the existing barrel with a longer barrel

Engineering Contradiction:

Improveaccessory mounting capabilityVSAvoidbarrel length

Core Design Contradiction:

Adaptability or versatilityVSLength of moving object

Solution Approach 1:

The accessory is nested within the existing barrel length by creating internal threads. This eliminates the need to extend the barrel length to accommodate external threads, as the mounting structure is contained within the existing barrel bore. The overall length of the firearm remains unchanged while accessory mounting capability is added.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

By inverting the threading approach to use internal threading instead of external threading, the barrel length is preserved. The female threads are cut inside the barrel bore, allowing the accessory to be mounted without extending the barrel outward. This avoids the need to replace the barrel with a longer version.

Inventive Principle:

Principle #13The other way round (Inversion)

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

Enables the mounting of accessories like compensators, silencers, and flash suppressors internally, reducing recoil and maintaining firearm performance without the need for external threading or barrel replacement, thus simplifying and cost-effectively integrating accessory functionality.

Implementation Method 1

a tensioning spring positioned about the adaptor base shaft interposed between the locking jam and a lip of the adaptor base to retain the locking jam and the insert in the end of the barrel

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS10830550B2Firearm accessory mounting system

Publication Date: 2020.11.10 ZEV TECH LLC

AI summary

An adaptor for mounting the firearm accessory to a barrel of a firearm. The adaptor may include an indexing component that aligns the accessory into a desired orientation. The adaptor may include a threaded interconnection as well as a spring biased interconnection.