Rotating Cam Collar Locking System for Firearm Suppressors

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Solution Overview

Problem

Existing sound suppressor mounting systems for firearms suffer from loosening issues, inconsistent point-of-impact shift, and carbon build-up, which are critical problems in precision shooting due to the ratchet-type secondary retention system's limitations.

Innovation Solution

A rotating cam collar locking system that securely attaches the suppressor to a muzzle attachment device with minimal point-of-impact shift and reduced carbon build-up, featuring a rotating locking collar with two pawls that snap onto a knurled shoulder, providing a dual retention mechanism and minimizing thermal loading.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a ratchet-type secondary retention system is used to secure the suppressor, then the suppressor can be attached to the firearm, but the suppressor loosens during firing and carbon build-up prevents removal

Engineering Contradiction:

Improvesuppressor retentionVSAvoidsuppressor removal

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces the ratchet-type mechanical retention system with a cam collar locking mechanism. The cam collar, when rotated to the locked position, uses cam surfaces to force the locking spring pawls inward onto the suppressor body, providing secure retention without the toothed ratchet structure that accumulates carbon and prevents removal.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention extracts and eliminates the problematic ratchet-type secondary retention system entirely, replacing it with a cam collar mechanism that avoids carbon build-up issues in threaded areas while maintaining secure suppressor attachment during firing.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If a ratchet-type secondary retention system is used, then the suppressor can be secured to the firearm, but the point of impact shifts inconsistently after removal and re-attachment

Engineering Contradiction:

Improvesuppressor retentionVSAvoidpoint of impact consistency

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The cam collar locking mechanism provides consistent, repeatable positioning of the suppressor on the firearm. The cam surfaces and locking pawls engage at precise, predetermined positions, ensuring that the suppressor is always attached in the same orientation and location, thereby maintaining consistent point of impact.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If a ratchet-type secondary retention system with small locking area is used, then the suppressor can be locked in one position, but the locking area is too small to prevent loosening

Engineering Contradiction:

Improvesuppressor lockingVSAvoidlocking area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The cam collar mechanism distributes the locking force around the suppressor body through the cam surfaces and multiple pawls, creating an effective locking action without requiring a large localized locking area. The cam action forces the pawls inward onto the suppressor body, providing secure retention across a distributed interface rather than a small concentrated area.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 system ensures secure attachment and detachment of the suppressor with minimal point-of-impact shift and reduced carbon build-up, maintaining stability during firing and extending the life of the locking spring by reducing thermal loading.

Implementation Method 1

The mounting system features a rotating locking collar that forces a locking spring with two pawls inwards and onto a coined or knurled shoulder that is part of the muzzle attachment device

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Implementation Method 2

a coined or knurled shoulder that is part of the muzzle attachment device

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS8555765B2Systems methods and devices for attaching a suppressor to a firearm

Publication Date: 2013.10.15 THE SMALL BUSINESS ADMINISTATION TOTAL ASSIGNEE OF MOUNTAIN WEST SMALL BUSINESS FINANCE

AI summary

The invention relates to devices for attaching or removing a sound suppressor or other auxiliary device to a firearm. The device has a mount body threadedly attachable to a muzzle attachment device attached to the muzzle of a gun. A locking spring extends around a portion of the mount body, and has serrated pawls for engaging a portion of the muzzle attachment device. An annular, rotatable locking collar attaches to the mount body and extends over the locking spring. As the locking collar is rotated, a reduction in diameter of the inner surface of the locking collar can urge the pawl into secured contact with the muzzle attachment device.