Fluid Dispenser Refill Access Control for Authentic Fluid Supply
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Solution Overview
Problem
Existing 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 counter mountable fluid dispenser with a below deck reservoir, an above deck spout, and an access door with a switch mechanism that disables the dispensing mechanism when the access door is open, along with a keying mechanism using RFID tags or quick disconnect sockets, to ensure only authorized refill containers can connect and supply fluid to the reservoir, and a fill level sensor to detect improper refilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an external refill container is used to supply fluid to the reservoir, then refilling convenience is improved, but vulnerability to unauthorized refilling increases
Solution Approach 1:
The system performs preliminary verification of the refill container through RFID tagging and keying mechanisms before allowing fluid transfer. The controller checks authorization signals and validates container identity in advance, preventing unauthorized refilling before it occurs rather than detecting it after the fact.
Solution Approach 2:
The patent introduces an RFID tag and keying mechanism as an intermediary between the refill container and the reservoir. This intermediary layer verifies authorization and mediates the refilling process, ensuring that only authenticated containers can supply fluid while maintaining the convenience of external refilling.
2Ease of repair
If the access door is made easily openable for maintenance, then ease of maintenance is improved, but security against improper refilling deteriorates
Solution Approach 1:
The access door incorporates a dynamic switching mechanism that changes the state of the dispensing mechanism based on door position. When the door is opened, the switch mechanism automatically disables dispensing, creating a dynamic security response that adapts to the door's state while still allowing easy physical access for authorized maintenance.
Solution Approach 2:
The system uses a switch mechanism that provides feedback about the access door's position to the dispensing mechanism. This feedback loop ensures that when the door is opened for maintenance, the dispensing function is automatically disabled, preventing improper refilling while allowing authorized access.
3Reliability
If mechanical keying mechanisms are used to prevent unauthorized refilling, then fluid authenticity is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical keying mechanisms with RFID (radio frequency identification) technology. This substitution maintains the security and authenticity verification functions while dramatically reducing mechanical complexity, as RFID uses electromagnetic fields rather than physical keys and locks.
Solution Approach 2:
The system changes the parameter of authorization verification from mechanical (physical key shapes and lock configurations) to electromagnetic (RFID signal frequencies and identification codes). This parameter change simplifies the device structure while maintaining or enhancing the reliability of fluid authenticity verification.
4Productivity
If the supply passage is kept open for easy refilling, then refilling speed is improved, but risk of improper filling increases
Solution Approach 1:
The system performs preliminary authorization verification through RFID and keying mechanisms before opening the supply passage. The controller checks the refill container's authenticity and authorization status in advance, and only then enables the supply valve, ensuring fast refilling without compromising security.
Solution Approach 2:
The controller uses feedback from RFID verification and keying mechanism status to control the supply valve. The valve remains closed until proper authorization is confirmed, then opens to allow rapid fluid transfer. This feedback-controlled approach maintains both speed and security in the refilling process.
Data Source
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AI summary
The invention relates to a fluid dispenser comprising: a reservoir for storing a fluid; an outlet port connected with the reservoir by a dispense passage for dispensing fluid stored in the reservoir; an external supply port connected with the reservoir by a supply passage to supply fluid to the reservoir; a supply access valve defining a portion of the supply passage between the external supply port and the reservoir; and a controller in circuit communication with the supply access valve for controller operation of the supply access valve from a closed position to an open position in response to receipt of an authorized supply signal at the controller.