Magnetically Attachable Edge Guard for Weapons Bay Door Geometry

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Solution Overview

Problem

Existing edge guards for aircraft weapons bay doors are easily dislodged during maintenance and require multiple pieces to accommodate edges with different planes or angles, leading to incomplete protection and increased complexity.

Innovation Solution

A magnetically attachable edge guard with resilient segments and discontinuities, designed to fit complex geometries, using magnets for secure attachment and adaptable to various edge configurations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If foam bumpers are used to protect the weapons bay door edges, then the edges are protected from impacts, but the bumpers are easily dislodged during maintenance operations

Engineering Contradiction:

Improveimpact protectionVSAvoidattachment security

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent replaces the mechanical friction-fit attachment system with a magnetic attachment system. Magnets are embedded in the resilient channel to provide secure magnetic attachment to the ferrous door edge, preventing the bumper from being easily dislodged during maintenance while maintaining impact protection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses a composite structure combining resilient material (such as rubber or foam) with embedded magnets. The resilient material provides impact absorption and cushioning, while the embedded magnets provide secure attachment to the door edge, creating a composite solution that addresses both protection and attachment security.

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If multiple separate bumpers are used to accommodate edges with different planes or angles, then each edge section is protected, but the number of parts and maintenance complexity increases

Engineering Contradiction:

Improveedge protectionVSAvoidnumber of parts

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent divides the edge guard into multiple segments separated by discontinuities, allowing each segment to be independently positioned and attached to different edge sections. This segmentation enables the single bumper to accommodate edges with different planes and angles by bending at the discontinuities, reducing the need for multiple separate bumpers.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent designs a universal edge guard that can protect multiple edge sections with different geometries using a single bumper. The resilient material and discontinuities allow the bumper to be configured to match various edge configurations, making it a multi-functional solution that reduces inventory complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Stability of the object's composition

If rigid edge guards are used to provide stable protection, then the guards maintain their shape, but they cannot accommodate edges with discontinuities and different planes

Engineering Contradiction:

Improveguard stabilityVSAvoidgeometry adaptation

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The patent uses resilient material such as rubber or foam that has flexible properties. This resilient material can be bent and deformed to accommodate edges with discontinuities and different planes, while still maintaining sufficient stability to provide protective function. The material's elasticity allows it to conform to complex geometries.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent incorporates discontinuities in the bumper structure that allow dynamic bending and flexing. These discontinuities enable the bumper to adapt its shape in response to different edge geometries while maintaining overall structural integrity and protective stability.

Inventive Principle:

Principle #15Dynamics

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

Provides comprehensive protection against impacts and maintains secure attachment during maintenance, reducing damage and simplifying inventory management by accommodating diverse edge geometries with a single guard.

Implementation Method 1

a third plurality of discrete magnets disposed within the cross section

Methodology Applied

Scientific EffectMagnetic attachment: Magnetism

Data Source

PatentUS20250326480A1Protective magentically attachable edge guard for weapons bay door

Publication Date: 2025.10.23 THE GOVERNMENT OF THE UNITED STATES AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE

AI summary

An edge guard for protecting door edges. The edge guard is elongate with a C-shaped or J-shaped cross section configured to fit a specific edge to be protected. The cross section has two legs and an intermediate channel which fits onto the door edge. The edge guard has alternating segments and discontinuities in longitudinal direction. The segments are specifically sized to match corresponding sections of the edge to be protected. Adjacent segments may be angularly disposed within the plane of the channel, out of the plane of the channel or both. Predetermined segments have embedded magnets for removable attachment to the door.