Foam Dispensing Device with Segmented Activation and Thermochromic Tip
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Solution Overview
Problem
Existing foam dispensing devices lack fail-safe operation, hose deformation prevention during shipment, and efficient activation mechanisms, particularly in two-component polyurethane foam applications.
Innovation Solution
A portable foam dispensing apparatus with a carrier assembly, a two-stage activation procedure, and a deformable hose crimping prevention mechanism, featuring a pivotable trigger and thermochromic materials for temperature indication, allowing remote operation and minimizing hose deformation during storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a two-component foam system is used to provide long shelf life, then the chemicals remain stable during storage, but the device lacks fail-safe operation and efficient activation mechanisms
Solution Approach 1:
The activation mechanism is segmented into two distinct stages: first rotating the cylinder to break the seal and allow pressure equalization, then depressing the valve to dispense foam. This segmentation provides a fail-safe operation that prevents accidental activation while ensuring proper mixing of components.
Solution Approach 2:
The first stage of activation (rotating the cylinder) performs preliminary action by breaking the seal and equalizing pressure before the actual foam dispensing occurs. This preliminary action ensures the system is properly prepared and prevents premature mixing of components.
2Ease of operation
If hoses are left connected during shipment and storage, then the device is ready for immediate use, but hose deformation and crimping occur
Solution Approach 1:
The hoses are extracted from the connected state during shipment and storage. The device is designed to accept hoses after the cylinder seal is broken, allowing hoses to be connected only when needed, thus preventing deformation during transport while maintaining readiness for immediate use upon activation.
3Productivity
If the cylinder valve is directly depressed for activation, then the operation is simple and quick, but there is no fail-safe mechanism to prevent accidental activation
Solution Approach 1:
The activation process is divided into two sequential steps: rotating the cylinder to break the seal, then depressing the valve. This segmentation eliminates accidental activation while maintaining efficient operation, as the user must complete both steps intentionally to dispense foam.
Solution Approach 2:
Rotating the cylinder serves as a preliminary action that must be completed before the valve can be depressed. This preliminary step acts as a safety mechanism that prevents accidental activation while adding minimal time to the overall activation process.
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 safe and efficient operation, prevents hose deformation during shipment, and allows for accurate temperature assessment of chemicals, enhancing the usability and yield of polyurethane foams.
Implementation Method 1
featuring a pivotable trigger and thermochromic materials for temperature indication
Data Source
AI summary
The invention pertains generally to an improved fluid dispensing device, particularly a dispensing device which employs at least one hemispherical domed cannister source of reactants and which uses a color-changing dispensing plastic tip to inform the end-user if the reactants are at a proper use temperature.