Sleeve Valve Ribs for Pump Pressure Equalization
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Solution Overview
Problem
Existing pump dispenser valves struggle to manage pressure differentials, particularly negative pressure build-up, which can lead to container collapse or leakage, limiting design flexibility and material selection for containers.
Innovation Solution
A sleeve-style valve with a frusto-conical shape and inner-facing ribs is designed to allow make-up air to pass through when a predetermined pressure differential is reached, preventing negative pressure build-up and ensuring container integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resilient flaps with upstanding walls are used to create a fluidic barrier, then sealing performance is improved, but the force required to activate the pump increases significantly
Solution Approach 1:
The valve is segmented into multiple functional zones: an upstream sealing region with flaps that seal against the container, a downstream sealing region with flaps that seal against the pump, and a central fluidic barrier. This segmentation allows each zone to perform its specific sealing function independently, reducing the overall force required compared to a single continuous barrier.
Solution Approach 2:
Different portions of the valve have different structural properties optimized for their specific functions. The upstream and downstream regions have flap structures for sealing, while the central region has a fluidic barrier configuration. This local differentiation allows effective sealing without requiring the entire valve structure to withstand maximum activation forces.
2Strength
If rigid containers are used to withstand pressure differentials, then structural strength is improved, but design flexibility and material selection are limited
Solution Approach 1:
The valve acts as an intermediary pressure management device between the container and the pump. It includes a pressure equalization channel that allows air to pass through the valve body, and a fluidic barrier that controls liquid flow. This intermediary structure protects flexible containers from pressure differentials while maintaining dispensing functionality.
Solution Approach 2:
The invention replaces the mechanical strength requirement of the container with a pressure management system in the valve. Instead of relying on the container's structural strength to withstand pressure differentials, the valve's pressure equalization channel and fluidic barrier manage the pressure dynamics, enabling the use of flexible containers.
3Adaptability or versatility
If collapsible containers are used to accommodate pressure differentials, then design flexibility is improved, but structural strength and risk of burst or leakage decrease
Solution Approach 1:
The valve serves as a protective intermediary between the flexible container and the dispensing system. Its pressure equalization channel allows air pressure to balance the negative pressure created during dispensing, preventing the flexible container from collapsing or bursting while maintaining its design flexibility.
4Reliability
If the valve creates significant sealing force through hoop strength, then seal integrity is improved, but ease of operation deteriorates
Solution Approach 1:
The valve's sealing function is segmented into multiple localized flap seals rather than a single continuous seal requiring high hoop strength. The upstream flaps seal against the container, downstream flaps seal against the pump, and the fluidic barrier provides additional sealing. This segmentation reduces the activation force while maintaining seal integrity.
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 valve effectively mitigates negative pressure build-up by allowing air to enter the container at specific pressure differentials, reducing the risk of container collapse and leakage, and providing greater design flexibility for pump dispensers.
Implementation Method 1
The resilient sidewalls of the container (not shown) expand, drawing the outer flaps 44 downward and allowing air to pass back into the container's interior.
Implementation Method 2
A sleeve-style valve with a frusto-conical shape and inner-facing ribs is designed to allow make-up air to pass through when a predetermined pressure differential is reached
Data Source
AI summary
A valve for a dispenser pump is carried on a circular post or tube of a pump body. A protruding, sealing flange is formed at one end, while the opposing end includes tapering ribs extend along the inner surface of the hollow, tubular valve. In function, the ribs facilitate the passage of make-up air between the inner surface and the post/tube.