Dual One-Way Valve Dispensing Cap for Leak and Air Control
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Solution Overview
Problem
Existing dispensing systems for coating materials lack effective mechanisms to prevent material leakage without force application and air ingress during use, leading to inefficiencies and contamination.
Innovation Solution
A dispensing assembly with a first one-way valve to prevent material dispensing without force and a second one-way valve to block air entry, utilizing elastomeric members to control fluid flow and air exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional open dispensing system is used, then material can be dispensed freely, but material leakage occurs when no force is applied and air enters the container during use
Solution Approach 1:
The dispensing system is segmented into two separate one-way valve mechanisms: a first one-way valve for controlling material flow in one direction, and a second one-way valve for controlling air flow in the opposite direction. This segmentation allows each valve to specialize in preventing specific types of contamination (material leakage or air ingress) without requiring a complex bidirectional valve, thereby improving reliability while keeping individual valve components simple.
Solution Approach 2:
The elastomeric member acts as an intermediary element that interacts with both the dispensing stem and inlet stem to control fluid and air flow. By positioning the elastomeric member as a mediator between the container interior and exterior, the system achieves reliable sealing and flow control through a single flexible component that responds to pressure differentials, simplifying the overall valve mechanism while maintaining high reliability.
2Object-affected harmful factors
If one-way valves are added to prevent leakage and air ingress, then product integrity is maintained, but device structure becomes more complex
Solution Approach 1:
The first one-way valve and second one-way valve are merged into a single integrated cap structure, with both valves and the elastomeric member forming part of the cap assembly. This merging allows the system to achieve comprehensive contamination prevention (both material leakage and air ingress) through a unified structural design rather than separate independent valve assemblies, thereby reducing overall device complexity while maintaining effective protection against harmful factors.
Solution Approach 2:
The cap structure serves multiple functions simultaneously: it seals the container opening, houses both one-way valve mechanisms, provides structural support for the dispensing and inlet stems, and integrates the elastomeric sealing member. This multi-functionality allows the cap to achieve comprehensive contamination prevention without adding separate dedicated components for each function, effectively managing complexity while ensuring product integrity.
3Ease of operation
If elastomeric members are used to control flow, then material dispensing is controlled, but manufacturing precision requirements increase
Solution Approach 1:
The elastomeric member's physical parameters (such as durometer hardness, thickness, and compression set) are optimized to provide adequate sealing force and flow control response without requiring extremely tight manufacturing tolerances. By selecting elastomeric materials with appropriate viscoelastic properties, the system achieves reliable controlled dispensing that is tolerant of normal manufacturing variations, thereby improving ease of operation while keeping manufacturing precision requirements at practical levels.
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
Ensures controlled material dispensing and air management, maintaining product integrity and preventing contamination, enhancing user experience and operational efficiency.
Implementation Method 1
a first elastomeric member surrounding the dispensing stem and covering the dispensing opening
Implementation Method 2
a second elastomeric member surrounding the inlet stem and covering the outlet opening
Data Source
AI summary
Provided is a dispensing assembly for dispensing a material. The dispensing assembly includes a container defining a cavity, a receptacle configured to be disposed in the cavity, and a cap configured to be coupled to the container and the receptacle. The cap includes a dispensing stem configured to dispense the material from the receptacle in the container, a first one-way valve configured to prevent the material from being dispensed though the dispensing stem in the absence of a force being applied to the container, and a second one-way valve configured to prevent air from entering the cavity in the container when the force is applied.