Removable Cargo Door Shield for Loading Impact Protection

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Solution Overview

Problem

Cargo doors of aircraft are prone to damage due to excessive contact with cargo or loading/unloading equipment when opened, leading to potential repair needs and aircraft downtime.

Innovation Solution

A removable cargo door shield system with side guides and a contoured door shield that attaches to the cargo bay doorway and ceiling, protecting the cargo door during loading and unloading without impeding its movement, and can be easily stored when not in use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a cargo door shield is installed to protect the cargo door from impact damage, then the reliability of the cargo door is improved, but the device complexity increases due to additional components like side guides and attachment features

Engineering Contradiction:

Improvecargo door protectionVSAvoidshield system structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The door shield system is divided into separate components: the door shield itself, side guides, and attachment features. This segmentation allows each component to be optimized independently and facilitates easier installation and removal without compromising the overall protective function.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Side guides are introduced as intermediary elements between the cargo door and the door shield. These guides facilitate the proper positioning and movement of the door shield while maintaining the protective function, effectively mediating between the door and shield components.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a door shield system with side guides is used to protect the cargo door, then the reliability is improved, but the ease of operation deteriorates due to additional installation and removal procedures

Engineering Contradiction:

Improvecargo door protectionVSAvoidshield installation and removal

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The side guides are pre-installed on the cargo bay structure before the door shield is attached. This preliminary action simplifies the overall operation by eliminating the need to install multiple components during each shield attachment/detachment cycle, reducing the operational complexity while maintaining protection.

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If the cargo door shield is designed to be removable for easy storage, then the ease of operation is improved, but the reliability may deteriorate due to potential issues with reattachment

Engineering Contradiction:

Improveshield removabilityVSAvoidshield attachment security

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The door shield is extracted as a separate, removable component from the fixed structure. This allows the shield to be easily removed for storage or replacement while the side guides remain permanently installed, maintaining a reliable attachment mechanism when the shield is installed.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The attachment system is designed to be dynamic rather than static, allowing the door shield to be easily attached and detached while maintaining secure connection during use. The attachment features provide reliable fastening when installed but allow for straightforward removal when needed.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12358604B2Aircraft cargo door shield

Publication Date: 2025.07.15 B&J IP LLC

AI summary

A cargo door shield system for a cargo bay door in an aircraft used to prevent the exterior surface of the cargo bay door from being damaged by objects moving through the cargo bay door during loading and unloading of the aircraft.