Pressurized Dispenser Container Assembly With Gastight Partition Wall

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Solution Overview

Problem

Existing dispenser containers for pressurized fluids face challenges in maintaining consistent pressure over their lifetime due to leakage and fluid level changes, which is critical for accurate dosing in applications like sealants and medical contexts, and their assembly is complex and costly.

Innovation Solution

A method for manufacturing dispenser containers with a partition wall that uses matching indentations in the cylindrical shell to ensure a gastight fit, allowing for simplified assembly and reduced production costs by using a single handling step and controlled indent application from both inside and outside the shell.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the partition wall is fixed in the cylindrical metal shell by deformation of the shell to create an internal protrusion, then the partition wall achieves secure fixation, but the assembly process becomes complex and manufacturing time increases

Engineering Contradiction:
Improvepartition wall fixationVSAvoidassembly process
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The cylindrical shell is pre-formed with an external indent during the shell manufacturing process, which creates the corresponding internal protrusion before assembly. This preliminary action eliminates the need for complex post-assembly deformation operations and simplifies the overall manufacturing process while ensuring reliable partition wall fixation

Inventive Principle:
Principle #10Preliminary action

2Reliability

If the partition wall is fixed by deformation of the cylindrical shell to create a protrusion, then secure fixation is achieved, but the manufacturing process becomes time-consuming and costly

Engineering Contradiction:
Improvepartition wall fixationVSAvoidmanufacturing speed
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The external indent is incorporated into the shell forming process itself, allowing the protrusion to be created during the primary manufacturing operation. This eliminates separate deformation steps and reduces overall manufacturing time and cost while maintaining reliable fixation

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The formation of the external indent is merged with the shell forming process, combining multiple operations into a single manufacturing step. This integration improves productivity by eliminating sequential operations while ensuring the protrusion is properly formed for partition wall fixation

Inventive Principle:
Principle #5Merging (Combining)

3Manufacturing precision

If matching indentations are used in the cylindrical shell for the partition wall, then dimensional accuracy is improved, but the manufacturing process becomes more complex

Engineering Contradiction:
Improvedimensional accuracyVSAvoidmanufacturing process
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The external indent is pre-formed during shell manufacturing with precise dimensions, ensuring accurate positioning of the partition wall. This preliminary formation of the indexing feature simplifies the overall process by eliminating the need for complex post-assembly adjustment mechanisms

Inventive Principle:
Principle #10Preliminary action

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

This method enhances dimensional accuracy, reduces production time and costs, and ensures a consistent pressure throughout the container's life, improving the durability and seal integrity of the dispenser.

Implementation Method 1

The partition wall is fixed in the cylindrical metal shell by deformation of the cylindrical metal shell so that in the inside of the cylindrical shell a protrusion arises

Methodology Applied
Scientific EffectDeformation: Deformation

Data Source

PatentEP4476147B1Method for manufacturing a dispenser container for pressurized fluids and dispenser container for pressurized fluids as manufactured with this method
Publication Date: 2026.04.08 JAN KELDERS BEHEER BV
  • EP4476147B1 patent drawingFigure 1A
  • EP4476147B1 patent drawingFigure 1B
  • EP4476147B1 patent drawingFigure 2

AI summary

The invention relates to a method for manufacturing a dispenser container for pressurized fluids, comprising the steps of providing a cylindrical; a partition wall for separating the internal volume of the cylindrical shell; and a piston; and bringing the partition wall and the piston together into the lower part of the cylindrical shell before applying an external indent in the cylindrical shell. The invention further relates to a dispenser container for pressurized fluids as manufactured with this method.