Aerosol Valve Stem With Internal Thread For Adapter Connection
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Solution Overview
Problem
Existing pressurized aerosol containers with moisture-reactive compositions, such as polyurethane foams, face challenges in dispensing accuracy and ease of use due to short, straight valve stems, leading to inefficient actuation and potential spillage when attaching dispensing adapters, requiring separate production lines for DIY and professional applications.
Innovation Solution
A valve stem with an internal screw thread and external trunco-conical flange allows for easy, gas-tight connection of both disposable adapters and dispensing guns, ensuring precise dispensing without spillage, featuring a continuous helical groove with tapered cross-section for reduced friction and enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a short, straight valve stem is used to keep the can compact for storage, then storage efficiency is improved, but dispensing accuracy and ease of actuation deteriorate
Solution Approach 1:
The valve system is divided into two separate components: a compact valve stem integrated into the can, and an external dispensing adapter. The adapter contains the extended dispensing duct and actuating means, allowing the valve stem itself to remain short and compact while achieving accurate dispensing through the separate adapter component.
Solution Approach 2:
The dispensing adapter is designed to be attached to and surround the valve stem, with the adapter's dispensing duct extending from the valve stem's central bore. This nested configuration allows the compact valve stem to function with an extended dispensing capability when the adapter is attached.
2Device complexity
If a snap-fit or bayonet connection system is used to fix the dispensing adapter directly onto the valve stem, then device complexity is reduced, but liquid spillage increases due to required pressure application
Solution Approach 1:
The valve stem is pre-formed with an internal screw thread during manufacturing. This preliminary preparation allows the dispensing adapter to be attached by simple screwing without requiring forceful pressing or complex alignment, thereby preventing liquid spillage while maintaining connection system simplicity.
3Adaptability or versatility
If separate production lines are used for DIY and professional dispensing applications, then product specialization is improved, but manufacturing complexity and distribution costs increase
Solution Approach 1:
The valve stem is designed with a universal internal screw thread that can accommodate different types of dispensing adapters. The same valve stem can be used with simple adapters for DIY applications or more sophisticated adapters for professional applications, allowing a single production line to serve multiple market segments.
Data Source
Figure 1(a)~5
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
The present invention concerns a pressurized aerosol container comprising a specific valve and a dispensing adapter to be used therewith for dispensing a pressurized liquid contained in said container, the liquid beng preferably a moisture reactive composition. The valve comprises a valve stem (1) provided with a central bore (1C) having an internal threaded portion (IF), allowing the fixing and connection of a disposable dispensing adapter (5), comprising a connecting end provided with a mating outer threaded portion (5F).