Self-Venting Dispenser Valve for Pressure-Balanced Liquid Flow
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Solution Overview
Problem
Existing dispensing valves for rigid liquid containers face challenges in equalizing pressure differentials during dispensing, often requiring separate vents and additional manufacturing costs, and lack automatic shut-off and mess-free operation, especially when handling both viscous and low viscosity liquids.
Innovation Solution
A dispensing valve with a tubular body featuring an air vent and a liquid vent, an integral lid with seals, a collapsible dome member, and a flexible stem, allowing air to enter while liquid exits, and automatically shutting off when pressure is released, eliminating the need for a separate air input and ensuring equal pressure inside and outside the container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate remote vent opening is provided in the container, then pressure equalization is achieved, but manufacturing costs increase
Solution Approach 1:
The air vent and liquid dispensing functions are merged into a single integrated valve assembly. The valve body incorporates both an air vent passage and a liquid outlet passage, allowing the valve to simultaneously equalize pressure and dispense liquid through one component rather than requiring separate remote vent and dispensing mechanisms
Solution Approach 2:
The valve assembly serves multiple functions: it acts as both an air vent for pressure equalization and a liquid dispensing mechanism. The single valve component performs what previously required separate vent openings and dispensing valves, reducing manufacturing complexity and cost
2Device complexity
If a self-venting valve is used, then separate vent opening is eliminated, but automatic shut-off function is lacking
Solution Approach 1:
The valve incorporates a movable valve member that can dynamically transition between open and closed positions. A biasing mechanism (spring) provides restoring force to automatically return the valve member to the closed position when actuation force is released, enabling automatic shut-off functionality
Solution Approach 2:
The valve system provides automatic feedback through the biasing mechanism that continuously pushes the valve member toward the closed position. When liquid flow creates pressure differential or when actuation is released, the spring force automatically restores the valve to its default closed state, preventing inadvertent dispensing
3Ease of operation
If the valve is designed for mess-free operation, then dispensing control is improved, but handling of viscous and low viscosity liquids becomes challenging
Solution Approach 1:
The valve internal passages are segmented into separate air vent passage and liquid outlet passage. This segmentation allows optimized flow paths for different liquid types, with the liquid outlet configured to provide controlled dispensing that prevents dripping and mess while accommodating various viscosities through appropriate passage geometry
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 solution provides a low-cost, easy-to-assemble, reliable, and mess-free dispensing mechanism that maintains equal pressure within the container, preventing vacuum effects and allowing for efficient dispensing of various liquids without additional venting requirements, while ensuring automatic shut-off to prevent inadvertent dispensing.
Implementation Method 1
pressure within the container is equalized as the liquid contents are dispensed
Implementation Method 2
a liquid seal coupled to the integral lid capable of positioning within a liquid vent opening and an air seal coupled to the integral lid capable of positioning within an air vent opening
Implementation Method 3
an elongated, generally rigid stem member having a first end coupled to the collapsible and a second end capable of flexibly extending within the valve body
Data Source
AI summary
In some embodiments, a dispenser for attachment to a liquid container may include one or more of the following features: (a) a tubular valve body of a generally hollow form having a liquid outlet port on one end of the valve body capable of coupling to the liquid container, the valve body further including an air vent opening and a liquid vent opening located on an opposite side of the valve body, (b) an integral lid with the valve body slidingly disposed on the opposite side of the valve body and coupled to be moved between a liquid blocking and a liquid dispensing position, and (c) a liquid seal coupled to the integral lid capable of positioning within a liquid vent opening and an air seal coupled to the integral lid capable of positioning within an air vent opening.