Syringe Reducer Air Passage Design
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Solution Overview
Problem
The existing syringe doser design allows external air to enter the hollow body during product collection, resulting in an undesired excess of air inside the syringe doser due to the depression generated by the piston, which is not effectively addressed by existing solutions.
Innovation Solution
A reducer with an annular fluid dynamic sealing structure and a passage that allows air to enter and exit the container, positioned outside the concavity to prevent air from entering the syringe doser, ensuring that air is directed away from the collection opening and minimizing its entry into the syringe doser.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the syringe doser is used to collect product from the container, then the product can be dispensed to the child, but external air enters the hollow body through the annular seal causing excess air inside the syringe doser
Solution Approach 1:
The patent introduces an intermediary component (the seal modification structure) between the piston and the hollow body wall. By adding a protrusion on the piston that engages with a corresponding groove in the hollow body, or by modifying the seal structure itself, the invention creates a controlled pathway that prevents uncontrolled air ingress while maintaining the necessary sealing for product collection.
Solution Approach 2:
The sealing structure is segmented into distinct functional zones: an annular seal for maintaining pressure during product collection, and a controlled air pathway (through grooves or modified seal geometry) that allows air to be directed away from the hollow body. This segmentation allows the system to simultaneously maintain product sealing while managing air ingress.
2Quantity of substance
If the piston moves to collect product, then the product is drawn into the hollow body, but a depression is generated that attracts external air into the hollow body
Solution Approach 1:
The invention extracts the harmful effect (air ingress) from the system by providing a dedicated air escape pathway separate from the product collection pathway. The modified seal structure or added grooves create an extraction route for air to leave the system through a controlled path that does not compromise the product sealing, thereby resolving the pressure depression issue without affecting product collection.
3Reliability
If the annular seal is used between piston and hollow body wall, then sealing is maintained for product collection, but air enters from the opposite end of the hollow body
Solution Approach 1:
The seal structure is modified to have different local properties: the main annular seal maintains high sealing quality for product collection, while specific local modifications (protrusions, grooves, or segmented sections) create controlled low-resistance pathways for air to escape locally without compromising the overall sealing integrity. This local differentiation allows simultaneous achievement of reliable sealing and air management.
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 effectively minimizes the presence of air bubbles in the syringe doser during product collection by directing air recall upwards and away from the collection opening, preventing air from entering the syringe doser and maintaining the integrity of the product being dispensed.
Implementation Method 1
The passage 3 allows the reducer 1 to be crossed for placing the inside and the outside of the container in fluid communication
Implementation Method 2
an annular fluid dynamic sealing structure placed on the bottom 21 and surrounding the opening 210
Implementation Method 3
directing air recall upwards, away from the underlying opening 210
Data Source
Figure 1~2
Figure 3~4
AI summary
A reducer applicable to an opening of a container and identifying a seat (2) comprising a bottom (21) and a lateral flank (22) that define a concavity (20) intended for housing a portion of a syringe doser; said bottom (21) comprising an opening (210) suitable for allowing the passage of a fluid present in the container. The reducer (1) comprises a passage (3) intended for enabling the air to enter the container to compensate for the depressurisation induced in the container by the aspiration of the fluid by the syringe doser. The passage (3) is outside the concavity and allows the reducer (1) to be crossed for placing the inside and the outside of the container in fluid communication.