Firearm Coupling Member With Threaded Locking

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Solution Overview

Problem

Existing firearm accessory mounting systems require multiple steps and can loosen during operation due to vibration, making quick and secure attachment and detachment difficult, especially with one-hand operation.

Innovation Solution

A coupling member with a female and male component, featuring alternating threaded and unthreaded portions around the circumference, allowing for secure locking and easy detachment by rotating the male member, with optional spring elements for additional friction and abutment shoulders for precise alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a threaded lock member is used to maintain lugs within adapter lug retaining recesses, then the accessory is securely retained on the barrel, but the mounting process requires multiple steps and cannot be easily accomplished with one hand

Engineering Contradiction:
ImproveAccessory retention securityVSAvoidMounting operation simplicity
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent combines the threaded engagement mechanism and the locking function into a single integrated coupling member. The coupling member threads directly onto the barrel and simultaneously secures the accessory, eliminating the need for separate lock members and multiple操作步骤. This merging of functions allows one-handed operation while maintaining secure retention.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The patent removes the threaded lock member from the system entirely, extracting the locking function and integrating it into the coupling member itself. By taking out the separate lock member, the design simplifies the mounting process to a single threading action that can be performed with one hand, while the coupling member's structure ensures reliable retention.

Inventive Principle:
Principle #2Taking out (Extraction)

2Reliability

If a threaded lock member is used to secure the adapter, then the accessory is retained securely, but the possibility of loosening due to vibration during firearm operation exists

Engineering Contradiction:
ImproveAccessory retention securityVSAvoidConnection stability under vibration
Core Design Contradiction:
ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent merges the threading function and locking function into a single integrated coupling member that threads directly onto the barrel. This integration eliminates the separate lock member that could loosen under vibration, while the coupled threading-securing mechanism provides stable, vibration-resistant retention through its unified structural design.

Inventive Principle:
Principle #5Merging (Combining)

3Adaptability or versatility

If traditional adapter mounting systems are used, then accessories can be mounted on the barrel, but quick detachment and reattachment are difficult

Engineering Contradiction:
ImproveAccessory attachment/detachment flexibilityVSAvoidMounting and detachment time
Core Design Contradiction:
Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent segments the accessory mounting system into a separable coupling member that can be independently attached and detached. The coupling member with its throughbore allows the accessory to be mounted on the barrel in a modular fashion, enabling quick attachment and detachment without complex operations. This segmentation facilitates rapid reconfiguration while maintaining secure connection during use.

Inventive Principle:
Principle #1Segmentation

4Adaptability or versatility

If lugs and lug retaining recesses are used for timing the accessory to the barrel, then rotational orientation is controlled, but the system requires precise alignment during assembly

Engineering Contradiction:
ImproveRotational orientation controlVSAvoidAlignment precision during assembly
Core Design Contradiction:
Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent employs asymmetric features in the coupling member, including a non-circular cross-section or keyed interface, to provide inherent rotational orientation control. This asymmetric design ensures that the accessory can only be mounted in the correct rotational position, eliminating the need for precise manual alignment during assembly while maintaining proper timing between the accessory and barrel.

Inventive Principle:
Principle #4Asymmetry

Data Source

PatentEP3514475B1A coupling member
Publication Date: 2021.05.12 A TEC HOLDING AS
  • EP3514475B1 patent drawingFigure 1
  • EP3514475B1 patent drawingFigure 2a~2
  • EP3514475B1 patent drawingFigure 3

AI summary

The present invention relates to a coupling member for quick and easy attachment and detachment of a firearm accessory to a muzzle of the firearm, the coupling member comprising a female member (1a) and a male member (1b), wherein the female member is provided with a throughgoing bore (2), the female member further being provided with a number of successive threaded portions (3) and unthreaded portions (4) around a circumference of the throughgoing bore and wherein the male member around an outer circumference is provided with the same number of successive threaded portions and unthreaded portions as the female member.