Aerosol Valve Assembly with Segmented Isolation

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Solution Overview

Problem

Aerosol containers with shared valve components can cause reactions between two liquid type contents due to penetration through the stem or housing, leading to unintended reactions and degradation of hair dye products before use.

Innovation Solution

A valve assembly with independent and isolated aerosol valves, each with its own housing and pathway, and a holding member that fixes the valves to the outer container, preventing penetration and maintaining the integrity of each content.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a shared valve housing is used for multiple storage parts, then the device complexity is reduced, but the reliability deteriorates due to potential penetration and reaction between contents

Engineering Contradiction:

Improvevalve assembly structureVSAvoidcontent isolation integrity

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The valve assembly is divided into separate independent valve units, each with its own housing and pathway. Each storage part has its own dedicated aerosol valve with isolated housing, preventing any potential penetration or reaction between different contents while maintaining individual control over each content delivery path.

Inventive Principle:

Principle #1Segmentation

2Reliability

If independent aerosol valves with separate housings are used for each storage part, then the reliability of content isolation is improved, but the device complexity increases

Engineering Contradiction:

Improvecontent isolation integrityVSAvoidvalve assembly structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

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 allows for the stable storage of reactive contents by preventing direct contact and penetration, ensuring the intended effect of hair dye products is maintained and extending their shelf life.

Implementation Method 1

a spring pressuring the stem upward

Methodology Applied

Scientific EffectSpring: Spring

Implementation Method 2

a stem rubber closing a stem hole of the stem

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentEP2657151B1Valve assembly and aerosol container equipped with same, and aerosol product and process for production thereof

Publication Date: 2020.10.21 DAIZO

Figure 1
Figure 2(a)~2(b)
Figure 3

AI summary

A valve assembly in which contents respectively packed in multiple storage parts cannot be reacted with each other in the middle of passages thereof; an aerosol container equipped with the valve assembly; and an aerosol product. An aerosol container (10) comprises a bottom-closed cylindrical outer container (11), two inner bags (12) which are to be inserted into the outer container (11), and a valve assembly (13) which closes each of the inner bags (12) and also closes the outer container (11), wherein the valve assembly (13) comprises multiple aerosol valves (15) which are separated independently from each other and a holding member (21, 22) for holding the aerosol valves (15) and fixing the aerosol valves (15) to the outer container (11).