Barrel Nut Handguard Attachment Wedge Mechanism
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Solution Overview
Problem
Existing free-floating handguards face challenges in securely mounting to the barrel nut, particularly in preventing rotational and longitudinal displacement, which can lead to deformities in the mounting rails.
Innovation Solution
A firearm handguard attachment device featuring a barrel nut with a smooth, uninterrupted circumferential recess and a handguard with transversely extending openings and wedges that engage the recess to prevent axial translation and rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If slip-style barrel nut is used to mount free-floating handguard, then installation is simpler without rotational alignment requirements, but the handguard experiences rotational and longitudinal displacement leading to deformities in mounting rails
Solution Approach 1:
The securing mechanism is divided into multiple wedge components (first wedge and second wedge) that independently engage with the barrel nut and handguard. Each wedge can be adjusted and secured separately through transverse openings, allowing precise positioning without requiring rotational alignment while preventing both rotational and longitudinal displacement of the handguard.
2Reliability
If clamping wedges are used to prevent longitudinal displacement, then the handguard is secured axially, but additional structure is required to address rotational displacement
Solution Approach 1:
The wedge components serve dual functions: they prevent both longitudinal displacement (through their wedge geometry that resists axial movement) and rotational displacement (through their engagement with the circumferential features of the barrel nut). This merging of functions eliminates the need for separate rotational prevention mechanisms.
3Reliability
If securement screws are tightened to clamp the handguard to the barrel nut, then the handguard is securely mounted, but the sidewalls are pulled out of factory configuration causing deformities
Solution Approach 1:
The wedge components act as intermediaries between the securement screws and the handguard. Instead of screws directly clamping the handguard sidewalls (which causes deformation), the wedges distribute the securing forces through their geometry and engagement surfaces, maintaining the handguard's factory configuration while achieving secure mounting.
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 solution effectively secures the handguard to the barrel nut, preventing rotational misalignment and excessive axial movement, thus maintaining the factory configuration of the mounting rails and enhancing the stability and accuracy of the firearm.
Implementation Method 1
The wedges are configured to engage the uninterrupted surface of the recess to prevent axial translation of the handguard relative to the barrel nut and to prevent axial rotation of the handguard relative to the barrel nut
Data Source
AI summary
A firearm handguard attachment device comprises a barrel nut having a forward end, a rearward end, and a circumferential recess between the forward end and the rearward end, the recess having an uninterrupted surface and defining a forward shoulder and a rearward shoulder, a handguard having a forward end and a rearward end and configured to be slid onto the barrel nut, the handguard having a transversely extending opening in a lower portion thereof, the opening having a seat at each opposite end, a pair of wedges, one wedge of the pair being installed in one of the seats and the other wedge of the pair being installed in the other seat, and at least one fastener for drawing the wedges toward one another. The wedges are configured to engage the uninterrupted surface of the recess to prevent axial translation of the handguard relative to the barrel nut and to prevent axial rotation of the handguard relative to the barrel nut.