Counter-Mountable Fluid Dispenser with Refill Authorization Control
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Solution Overview
Problem
Fluid dispensers, especially those with external refill containers, are vulnerable to improper or unauthorized refilling, such as 'drill and fill' tactics, which can lead to incorrect or unauthorized fluids being added, compromising the quality and authenticity of the dispensed fluids.
Innovation Solution
The implementation of a system that includes a controller and keying mechanism for the external refill container, which communicates with the dispenser to authorize the refill and prevent unauthorized access, combined with a fill level sensor to detect and alert on improper refilling, ensuring only authorized and correct fluids are added to the reservoir.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an external refill container is used for the dispenser, then refilling convenience and ease of operation are improved, but vulnerability to unauthorized or improper refilling increases
Solution Approach 1:
The system performs preliminary verification of the refill container through keying mechanisms (magnetic, electronic, or RFID tags) before allowing fluid transfer. The controller checks authorization codes and validates container authenticity in advance, preventing unauthorized refilling before it occurs. This preliminary action ensures that only approved containers can be refilled, maintaining fluid authenticity while preserving convenience.
Solution Approach 2:
The system incorporates sensors (weight sensors, fill level sensors) that provide real-time feedback during the refilling process. The controller monitors the refilling operation continuously, detecting anomalies such as unauthorized containers or improper filling. This feedback mechanism allows the system to prevent unauthorized refilling while maintaining ease of operation for legitimate refills.
2Reliability
If mechanical or electronic keying mechanisms are implemented to prevent unauthorized refilling, then fluid authenticity is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical keying systems with simpler electronic or magnetic identification mechanisms. Instead of intricate mechanical interlocks, the system uses RFID tags, magnetic strips, or electronic codes on refill containers that can be verified by a microcontroller. This substitution maintains fluid authenticity while significantly reducing mechanical complexity and improving ease of manufacture.
Solution Approach 2:
The keying mechanism serves multiple functions: it identifies the container type, verifies authorization, tracks refilling history, and can even monitor fluid levels. This multi-functionality reduces the need for separate systems, thereby maintaining reliability while minimizing the increase in device complexity.
3Difficulty of detecting and measuring
If monitoring systems are added to detect improper refilling, then detection capability is improved, but device complexity increases
Solution Approach 1:
The monitoring system utilizes the existing refill container's own characteristics (weight, fill level, identification tags) to detect improper refilling. The weight sensor detects unauthorized containers by comparing expected vs. actual weight, and the fill level sensor monitors the refilling process without requiring additional external monitoring equipment. This self-service approach improves detection capability while minimizing added complexity.
Solution Approach 2:
The patent combines the monitoring functions with the existing control system and keying mechanism. The same microcontroller that manages the dispensing operation also handles authentication and monitoring tasks. Sensors are integrated into the existing refill interface rather than being separate add-on components. This merging approach improves detection capability while avoiding proportional increases in system complexity.
Data Source
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AI summary
A counter mountable fluid dispenser includes a below deck assembly and an above deck assembly. The below deck assembly includes a reservoir for storing a fluid, a dispensing mechanism in fluid communication with the reservoir, and a controller in circuit communication with the dispensing mechanism for operation of the dispensing mechanism. The above deck assembly includes a spout defining an outlet port in fluid communication with the reservoir for dispensing fluid stored in the reservoir upon operation of the dispensing mechanism, an external supply port in fluid communication with the reservoir by a supply passage to supply fluid to the reservoir, an access door movable between a closed position blocking access to the external supply port and an open position permitting access to the external supply port, and a switch mechanism configured to disable the dispensing mechanism when the access door is in the open position.