Removable Valve Guard for Ampoule Drop Protection
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Solution Overview
Problem
Existing valve guard designs for containers carrying hazardous materials are not adequately protected during side or top drops, as they are often permanently attached and not certified to meet the 49CFR section 178.504 requirements, particularly failing to secure the container in inverted drop scenarios.
Innovation Solution
A fully removable valve guard design that supports containers on their top, side, and bottom, featuring a top ring with bent posts and a hollow cylinder base with tubes, allowing secure attachment without modifying existing containers, and incorporating a spill containment annular volume, ensuring protection during drop tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve guard is permanently attached to the container, then the protection during drop tests is improved, but the ease of access to dispensing ports deteriorates
Solution Approach 1:
The valve guard is divided into separate modular components including a top ring, multiple posts, and a base that can be assembled and disassembled. This segmentation allows the guard to be permanently secured during transport for protection while enabling easy removal when dispensing access is needed, resolving the contradiction between protection reliability and operational ease.
2Reliability
If the valve guard is designed to secure the container on side and top, then the protection during side or top drops is improved, but the device complexity increases
Solution Approach 1:
The valve guard components serve multiple functions: the posts provide structural support for top and side protection, act as attachment points for securing the guard to the container, and form part of the spill containment system. This multi-functionality reduces overall device complexity while achieving comprehensive protection during side or top drops.
Solution Approach 2:
The valve guard components are designed to nest together, with the top ring containing the posts which in turn contain the base. This nested structure provides robust multi-directional protection while maintaining a compact form that minimizes added complexity and space requirements.
3Ease of operation
If the valve guard is made fully removable, then the ease of access to dispensing ports is improved, but the protection during inverted drops deteriorates
Solution Approach 1:
The valve guard is pre-assembled with all protective components (top ring, posts, base) configured before attachment to the container. This preliminary configuration ensures that when the guard is secured to the container, it immediately provides comprehensive protection including inverted drop protection, while still maintaining full removability when needed for dispensing access.
Data Source
AI summary
A fully removable chime or valve guard that can support the container on its top, side and bottom is provided. The removable chime or valve guard provides protection if the container is dropped on its side or top. The protection provided allows the containers to pass a drop test per 49 CFR section 178.603, so the containers can be certified per 49 CFR 178.504.