Plunger Air Escape Constriction for Air-Free Filling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for filling and storing substances in delivery systems often result in trapped air and ingredient evaporation, especially in small volumes, which can affect the quality of pharmaceutical products and other precise dosing applications.
Innovation Solution
A plunger design with a passageway featuring a constriction that allows trapped air to escape, combined with a deformable sealing lip and a plug configuration that ensures a tight seal, enabling air-free filling and storage while accommodating varying substance volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If assembly is performed under vacuum to avoid air trapping, then air-free encapsulation is improved, but ingredient evaporation worsens and manufacturing complexity increases
Solution Approach 1:
Instead of evacuating air from the cartridge, the invention inverts the approach by allowing air to escape during assembly through a dedicated air escape hole in the plunger, eliminating the need for vacuum assembly and preventing ingredient evaporation.
Solution Approach 2:
The plunger is segmented into multiple functional parts including a body, an air escape hole, and a sealing element that can move between sealed and unsealed positions, allowing air to escape while preventing substance leakage.
2Reliability
If plunger is designed with sealing structures to prevent leakage, then sealing performance is improved, but air escape capability worsens
Solution Approach 1:
The sealing element is designed to be movable rather than fixed, allowing it to dynamically transition between a unsealed position during assembly (permitting air escape) and a sealed position during operation (preventing leakage).
Data Source
AI summary
The present invention is directed to a plunger, a plunger assembly, and a system for storing a substance or substances, preferably flowable substances, and a method of filling and sealing a substance in a storing system. In particular, the present invention provides for substantially air-free filling and storing of substances in a delivery system.