Trigger Dispensing Device Flexible Membrane Sealing
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Solution Overview
Problem
Existing trigger dispensing devices suffer from leaks between the pre-compression valve and its supporting components, leading to a decrease in dispensing pressure.
Innovation Solution
A trigger dispensing device with a supply valve featuring a flexible membrane and a blocking element, where the membrane deforms to allow pressurized liquid into the dispensing duct while maintaining an optimal seal, and components are designed for rapid and reliable assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a pre-compression valve is positioned between the pumping chamber and the liquid dispenser duct, then the liquid can be pre-compressed before dispensing to achieve better spray distance and fine drops, but leaks between the valve and supporting components cause a fall in dispensing pressure
Solution Approach 1:
The patent employs a flexible membrane as the valve element instead of rigid components. This membrane can deform elastically under pressure to create and break seals dynamically, ensuring reliable sealing performance while maintaining dispensing pressure. The flexible nature of the membrane allows it to conform to the valve seat and prevent leaks effectively.
Solution Approach 2:
The valve system transitions from static sealing to dynamic sealing through the movable membrane. The membrane moves between a retracted position (sealed) and a protruding position (open), allowing the system to adapt its sealing state based on operational requirements. This dynamic behavior ensures both reliable sealing when needed and efficient fluid passage when open.
2Ease of manufacture
If a traditional pre-compression valve is used, then liquid pre-compression is achieved, but the assembly process is time-consuming and reduces production speed
Solution Approach 1:
The valve assembly is divided into separate modular components: the membrane element, the blocking element, and the support structure. These segmented components can be manufactured independently and assembled quickly through simple attachment mechanisms, significantly reducing assembly time and increasing production speed compared to integrated traditional valve designs.
Solution Approach 2:
The membrane is positioned within a cavity formed by the blocking element and support structure, creating a nested arrangement. This nesting allows compact packaging of components and simplifies the assembly process, as components fit together in a straightforward hierarchical manner, reducing both assembly complexity and time.
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 consistent dispensing pressure and efficient liquid delivery with improved assembly efficiency, reducing machine-time and increasing production speed.
Implementation Method 1
a flexible membrane, which deforms to allow pressurized liquid into the dispensing duct
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
A trigger dispensing device (1) for a liquid comprises a frame (3) in which a dispensing duct (14) is made, an aspiration valve (30) and a supply valve' (60). The supply valve comprises a membrane (62) made in flexible material, abutting with the dispenser mouth (14a) of the dispensing duct (14). The device further comprises a blocking element (80), made in a rigid material, suitable for engaging with the frame and influencing the membrane in compression to hold it tight against the frame.