Vented Fluid Transfer Lid Texturized EDM Surface
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Solution Overview
Problem
Existing fluid transfer systems for enteral fluids, such as breast milk or formula, lack effective ventilation mechanisms that maintain aseptic conditions and prevent contamination during transfer between containers and syringes, especially when adhering to ISO 80369-3 design standards.
Innovation Solution
A vented transfer lid with a texturized EDM surface finish and threaded attachment collar that creates a vent path between the lid and the container, allowing air to pass through while preventing liquids from leaking, ensuring aseptic transfer and compatibility with ISO 80369-3 standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealed transfer lid is used to maintain aseptic conditions, then contamination is prevented, but air ventilation is blocked causing pressure buildup during fluid transfer
Solution Approach 1:
The vent path is segmented into multiple small apertures distributed across the sealing interface between the lid and container. This segmentation allows air to pass through in controlled amounts while maintaining the overall seal integrity, preventing both contamination and pressure buildup during fluid transfer operations.
Solution Approach 2:
The sealing surface is given non-uniform properties with specific regions containing vent apertures and other regions providing liquid-tight sealing. This local differentiation allows the same interface to simultaneously perform both ventilation and containment functions, resolving the contradiction between sealed and vented requirements.
2Object-generated harmful factors
If vent slots are added to allow airflow during transfer, then pressure equalization is achieved, but liquid leakage risk increases
Solution Approach 1:
The vent path utilizes a porous or micro-apertured structure in the sealing interface that allows gas molecules to pass through while the surface tension and viscosity of liquids prevent them from penetrating the same pathways. This enables pressure equalization without liquid leakage.
Solution Approach 2:
The vent apertures are designed with specific dimensional parameters (size, shape, distribution) that exploit the difference between gas and liquid flow characteristics. The aperture dimensions are optimized to permit airflow at operational pressures while blocking liquid passage through surface tension effects.
3Object-generated harmful factors
If a texturized EDM surface finish is applied to create vent paths, then air ventilation is enabled, but manufacturing complexity increases
Solution Approach 1:
The EDM process parameters (pulse duration, current, electrode geometry) are optimized to produce the required surface texture and aperture distribution in a single pass. By carefully controlling the machining parameters, the complex vent path structure is created efficiently without requiring multiple processing steps or post-manufacturing operations.
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
The solution ensures aseptic and efficient fluid transfer by maintaining air ventilation and preventing contamination, while adhering to ISO 80369-3 design standards, thus enhancing the safety and hygiene of enteral fluid handling.
Implementation Method 1
at least one vent path for permitting air to pass through at least one engagement interface or seal provided between the transfer lid and a container removably coupled to the transfer lid
Data Source
AI summary
A vented transfer lid includes an inner collar projecting from a top panel of the transfer lid and having an outer circumferential surface having a texturized electrical discharge machining (EDM) surface finish. In some example forms, an interior surface of the top panel includes a texturized EDM surface finish. In example forms, the transfer lid includes a transfer port wherein at least a portion of an interior surface of the transfer port includes a texturized EDM surface finish. In other embodiments, at least a portion of the vented transfer lid comprises a nonpolar boundary such that fluids exposed to the nonpolar boundary bead and form droplets having a dimension rendering them incapable of passing through one or more vent paths.