Oxygen Mask Intermediate Receptacle for Simplified Aircraft Installation
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Solution Overview
Problem
The installation of passenger oxygen masks in personal service units of aircraft is complex and not reproducible, requiring overhead work and frequent maintenance checks, which complicates the process and increases downtime.
Innovation Solution
A method involving an intermediate receptacle where oxygen masks are pre-arranged with components like flexible tubes and storage bags, allowing for simplified and reproducible installation by placing the pre-assembled receptacle into the personal service unit, using fastening means like Velcro or locking pins for secure connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If passenger oxygen masks are installed directly in the personal service unit overhead in the aircraft, then the masks can be positioned correctly for passenger access, but the installation process becomes complex and time-consuming requiring overhead work and frequent maintenance checks
Solution Approach 1:
The system is divided into two main segments: an intermediate receptacle containing pre-assembled oxygen masks and their components, and the personal service unit in the aircraft. The intermediate receptacle is prepared separately with all mask components pre-positioned and connected, then installed as a complete unit into the personal service unit. This segmentation allows complex assembly work to be performed on the ground rather than overhead in the aircraft.
Solution Approach 2:
All preparation and assembly work for the oxygen masks is performed in advance during ground operations. The intermediate receptacle is equipped with pre-connected flexible tubes, pre-positioned masks, and pre-assembled components under controlled factory conditions. This preliminary action eliminates the need for complex overhead assembly work during aircraft maintenance or operation.
2Reliability
If oxygen masks are installed and checked frequently for activation and maintenance, then safety and reliability are improved, but aircraft downtime increases due to repeated installation and maintenance activities
Solution Approach 1:
The intermediate receptacle merges multiple functions into a single integrated unit: it serves as the storage container for oxygen masks, the structural support for mask positioning, the connection interface for oxygen supply lines, and the removable module for maintenance. By combining these functions, the system allows the entire mask assembly to be replaced as one unit during maintenance checks, significantly reducing the time required for activation testing and maintenance compared to working with individual masks.
3Manufacturing precision
If multiple components like flexible tubes, storage bags, and activation cords are arranged in a defined manner within the container, then proper mask function is ensured, but the ready-to-use installation becomes complicated and difficult to perform overhead
Solution Approach 1:
The intermediate receptacle acts as an intermediary device between the ground assembly process and the final installation in the aircraft. It provides a controlled environment for precise component arrangement and connection of flexible tubes, storage bags, and activation cords under factory conditions. The receptacle itself serves as the mediator that transports this pre-assembled configuration to the aircraft, eliminating the need for overhead manipulation of multiple components.
Solution Approach 2:
The complex task of arranging and connecting multiple mask components is extracted from the overhead installation process and performed separately on the ground in the intermediate receptacle. By removing this complex assembly operation from the aircraft overhead environment, the actual installation becomes a simple matter of placing the pre-assembled receptacle into position and securing it.
Data Source
AI summary
A method for equipping a personal service unit with passenger oxygen masks includes arranging one or more passenger oxygen masks in an intermediate container ready for use, and then attaching the intermediate container together with the masks located therein within the personal service unit. In this manner, the comparatively lengthy packaging procedure which is difficult to carry out in overhead work, may be effected in a simplified and reproducible manner outside the aircraft.