Aerosol Dispensing Ring With Deformable Axial Wall
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Solution Overview
Problem
Aerosol dispensing devices with rings face issues of excessive radial stress on the valve body due to crimping and assembly, leading to potential deformation and malfunction, as well as contamination risks from contact between the product and neck seals.
Innovation Solution
A ring design with a deformable axial wall that absorbs radial stresses and limits contact with the neck seal, featuring a two-point contact with the valve body to distribute stress evenly and prevent deformation, while ensuring maximum emptying of the tank and minimizing product contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ring is tightly fitted on the valve body to ensure sealing and limit dead volume, then the sealing effectiveness is improved, but excessive radial stress is exerted on the valve body causing deformation and potential malfunction
Solution Approach 1:
The ring is divided into two distinct parts: an internal part with a radial groove that contacts the valve body at a specific location, and an external part that contacts the reservoir neck. This segmentation allows the sealing function to be separated from the stress-bearing function, preventing excessive radial stress on the valve body while maintaining effective sealing at the critical interface.
Solution Approach 2:
The radial groove in the internal part of the ring creates a localized contact zone with the valve body, concentrating the sealing effect at a specific location rather than distributing stress uniformly. This local quality approach ensures effective sealing while minimizing overall radial stress on the valve body structure.
2Object-affected harmful factors
If the ring contacts the neck seal to prevent product contamination, then product purity is improved, but the neck seal deteriorates faster due to contact with propellant gas and product
Solution Approach 1:
The harmful contact between the neck seal and the product/propellant mixture is eliminated by extracting the sealing function from the neck seal area. The ring's external part provides sealing against the reservoir neck, while the neck seal is positioned away from the product contact zone, allowing it to withstand only the crimping force without exposure to degrading chemical environments.
Solution Approach 2:
The ring acts as an intermediary sealing element between the valve assembly and the reservoir. It provides the necessary seal to prevent product leakage and contamination while protecting the neck seal from direct contact with the product and propellant gas, thereby extending the neck seal's service life.
3Strength
If the crimping force is increased to ensure secure fixation of the valve, then the fixation strength is improved, but the radial deformation of the reservoir neck increases causing excessive stress on the valve body
Solution Approach 1:
The ring structure segments the stress distribution by providing a rigid framework that spans across the crimping zone. The radial groove in the internal part creates a stress relief zone that prevents excessive radial stress transmission to the valve body, while still allowing sufficient crimping force for secure fixation.
Solution Approach 2:
The design changes the mechanical parameters of the connection by introducing a radial groove that modifies the stress distribution pattern during crimping. This parameter change allows the system to withstand higher crimping forces without transmitting excessive radial stress to the valve body, achieving both secure fixation and stress protection.
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 ring design effectively prevents valve body deformation, maintains a sealed contact to prevent contamination, and ensures efficient emptying of the tank without increasing radial stresses, thus enhancing the reliability and performance of the aerosol dispensing device.
Implementation Method 1
comprises a deformable axial wall part (16) capable of elastically deforming radially inwards
Data Source
AI summary
The invention concerns a ring (10) designed to be arranged around a valve body (21) of an aerosol dispenser valve (20) mounted, by means of a fixing element (50), such as a crimping cap, on a reservoir (1) containing the product to be dispensed. The invention is characterized in that said ring (10) comprises at least one inner part (11, 11') co-operating with said valve body (21), and an outer part (15), said outer part (15) including a deformable axial wall portion (16) extending towards the bottom of the reservoir and elastically deformable inwards in the radial direction.