Rail Accessory Attachment System Using Winged Nuts
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Solution Overview
Problem
Current rail attachment systems for firearm handguards lack sufficient positional flexibility and clamping surface area, leading to difficulties in mounting accessories close together and potential slippage, particularly with the KeyMod system which can detach from the handguard.
Innovation Solution
The RAK System employs double-keyhole mounting apertures and winged attachment nuts with a threaded aperture, allowing for robust and precise attachment of accessories by rotating the nut between locked and unlocked positions, providing a strong fixing position without requiring lateral movement and minimizing handguard space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional bolt or KeyMod systems are used for attaching accessories to handguards, then the attachment method is simple, but the positional flexibility is insufficient and accessories cannot be mounted close together
Solution Approach 1:
The mounting aperture is segmented into multiple functional zones: a through-hole for initial insertion, keyhole slots for lateral positioning, and a locking zone for final securing. This segmentation allows the attachment process to occur in distinct stages, enabling precise positioning while maintaining system simplicity.
Solution Approach 2:
The attachment system transitions from traditional single-dimension insertion to multi-dimensional engagement. The keyhole slots provide lateral (side-to-side) movement capability in addition to the forward insertion path, allowing accessories to be positioned at multiple locations along the rail while using the same mounting aperture structure.
2Ease of operation
If KeyMod system is used, then attachment is quick, but the system can slip backwards and detach from the handguard
Solution Approach 1:
The winged attachment nut incorporates built-in anti-detachment features that prevent backward slippage before it can occur. The wing geometry and engagement surfaces are designed to resist extraction forces, and the locking mechanism engages proactively to prevent the accessory from slipping backward during operation.
Solution Approach 2:
The attachment system allows dynamic adjustment during installation, transitioning from a loose fit through the through-hole to a secured position via the keyhole slots and locking mechanism. This dynamic process enables the user to insert quickly while ensuring reliable attachment through the progressive engagement stages.
3Strength
If traditional mounting apertures are used, then manufacturing is simple, but clamping surface area is insufficient for secure attachment
Solution Approach 1:
The mounting aperture is divided into functional segments that each contribute to clamping strength: the through-hole provides initial alignment, the keyhole slots create friction and positioning surfaces, and the locking zone provides the final clamping action. This segmentation increases effective clamping surface area without requiring complex manufacturing.
Solution Approach 2:
The winged attachment nut acts as an intermediary component that distributes clamping force across multiple surfaces. The wings engage with the keyhole slots to create additional contact points, effectively increasing the clamping surface area between the accessory and handguard while maintaining simple aperture geometry.
Data Source
AI summary
A rail accessory attachment system having one or more winged attachment nuts, wherein each winged attachment nut comprises two wing portions extending from a central portion of the winged attachment nut and a nut aperture formed through the winged attachment nut, wherein each winged attachment nut comprises a nut stop; an accessory portion having one or more accessory apertures, wherein each accessory aperture comprises at least one associated accessory stop; and wherein the nut aperture is aligned with the accessory aperture, such that a threaded portion of an attachment bolt interacts with a threaded portion of the nut aperture to rotatably attach or couple the winged attachment nut to the accessory portion, such that the nut stop is aligned relative to the accessory stop so that the winged attachment nut is rotatable relative to the accessory portion between a locked position and an unlocked position.