Pre-compression Valve for Trigger Dispenser
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Solution Overview
Problem
Existing manual trigger-dispensing devices struggle to achieve high pre-compressions necessary for uniform jetting and enhanced vaporization, requiring special pre-compression valves which are not easily adaptable or replaceable.
Innovation Solution
A manual trigger-dispensing device with a pre-compression valve system featuring a deformable plastic pre-compression valve and a unique mouth wall design, allowing liquid dispensing only when pressure exceeds a predefined threshold, and enabling easy conversion between different pre-compression settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If special pre-compression valves are provided to achieve very high pre-compressions, then the uniform jet and vaporization are enhanced, but the device complexity and manufacturing cost increase
Solution Approach 1:
The pre-compression valve is designed as a dynamic element that automatically responds to pressure changes. The valve opens when pressure exceeds the threshold and closes when pressure drops, eliminating the need for complex control mechanisms while achieving the desired high pre-compression effects
Solution Approach 2:
The valve incorporates a deformable membrane that changes its physical state based on pressure parameters. By adjusting the membrane's elasticity and the orifice dimensions, the pressure threshold can be tuned without changing the overall valve structure, simplifying both design and manufacturing
2Stress or pressure
If special pre-compression valves are provided to achieve very high pre-compressions, then the uniform jet and vaporization are enhanced, but the ease of manufacture decreases
Solution Approach 1:
The pre-compression valve utilizes a flexible membrane made of elastomeric material that can be manufactured using standard rubber molding techniques. This approach allows for easy production and replacement of the valve component without requiring specialized manufacturing processes
Solution Approach 2:
The valve is designed as a replaceable, cost-effective component that can be easily manufactured and replaced if needed. The simple construction using common materials like elastomeric membranes and rigid supports makes it economically viable to produce in large quantities
3Ease of operation
If a pre-compression valve with fixed threshold is used, then the dispensing control is simplified, but the adaptability to different liquid types and dispensing requirements is reduced
Solution Approach 1:
The valve threshold can be adjusted by changing physical parameters such as membrane elasticity, orifice size, or spring pre-load. This allows the same valve design to be adapted for different liquid viscosities, densities, and dispensing pressure requirements without redesigning the entire system
Solution Approach 2:
The valve design incorporates universal features that allow it to function across multiple applications. By providing adjustable threshold mechanisms and standardized mounting interfaces, the same valve type can serve different dispensing needs, enhancing versatility while maintaining operational simplicity
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 device achieves high pre-compressions for uniform jetting and vaporization, with the pre-compression valve system allowing for easy adaptation or replacement, enhancing usability and versatility.
Implementation Method 1
pre-compression valve means operating between said pressure chamber and said dispensing duct and suitable to allow the passage of liquid from said pressure chamber to said dispensing duct when the pressure in said pressure chamber exceeds a predetermined pressure threshold and suitable to prevent the passage of liquid from said pressure chamber to said dispensing duct when the pressure in said pressure chamber is lower than a predetermined pressure threshold
Implementation Method 2
a piston (32), translatable along an axis X, suitable to operate on the liquid contained in the pressure chamber (30); the piston (32) is engageable with the trigger (20) to place the liquid under pressure
Implementation Method 3
the head (10) comprises a pumping element (40) comprising a pressure membrane (42) deformable by the action of the trigger (20); the pressure membrane (42) defines, inside it, the pressure chamber (30) and itself operates as a piston
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
A head (10) of a trigger dispensing device (1) for liquids provided with a pre-compression valve (104) disposed in the upper region of the head. The valve (104) comprises an obturator wall (106) that cooperates with a mouth wall (102) to prevent the passage of liquid. The mouth wall (102) comprises a sealing section (102a) with which said obturator wall (106) is sealingly engaged to slide during a pre-compression step of the liquid.