Keyed Cartridge Valve Insert for Leak-Free Hygiene Dispensing
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Solution Overview
Problem
Existing hand hygiene dispensers often experience clogging due to suboptimal or inappropriate soap or detergent viscosity, leading to inoperable pumps and reduced hygiene compliance, especially in the food and healthcare industries.
Innovation Solution
A dispensing system featuring a cartridge with a nozzle having key shapes that match corresponding slots in the dispenser, ensuring only compatible cartridges and dispensers engage, preventing fluid discharge if mismatched, and utilizing a lock-out valve made of elastomeric material to maintain fluid containment until a matching nozzle is seated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single product is used across all industries and customer applications, then the dispenser system is simple and easy to operate, but the product may be inappropriate for the particular hygiene application or may not work properly in the dispenser
Solution Approach 1:
The patent employs asymmetric keying mechanisms where the nozzle has specific key shapes that must match corresponding slots in the index block. This asymmetric design ensures that only compatible cartridges can be installed in the correct orientation, preventing mismatched products from being dispensed while maintaining system simplicity.
Solution Approach 2:
The index block acts as an intermediary component between the cartridge and the pump assembly. It contains key slots that mediate the connection, ensuring proper alignment and compatibility before allowing the cartridge to engage with the dispensing mechanism. This intermediary structure enables product-specific compatibility without requiring complex electronic controls.
2Ease of operation
If maintenance personnel refill the dispenser at the site, then the system is easy to maintain and operate, but the refilled product may be suboptimal or inappropriate, leading to pump clogging and inoperability
Solution Approach 1:
The keying mechanism performs preliminary prevention by physically blocking incompatible cartridges from being installed in the dispenser. The asymmetric key shapes and corresponding slots create a mechanical barrier that stops maintenance personnel from accidentally installing wrong products, thereby preventing pump clogging and ensuring reliable operation before refilling occurs.
Solution Approach 2:
The dispenser system provides self-service compatibility checking through its mechanical keying design. The index block automatically verifies whether a cartridge is compatible through the key-slot engagement, eliminating the need for manual verification by maintenance personnel. This self-verifying mechanism ensures that only appropriate products can be refilled, maintaining pump reliability.
3Reliability
If the valve is normally closed to prevent fluid leakage, then fluid containment is maintained, but the valve must be reliably opened by the correct nozzle to permit dispensation
Solution Approach 1:
The valve is pre-configured in a normally closed state, establishing fluid containment before any dispensing action occurs. The correct nozzle, when properly inserted through the key slots, automatically performs the action of opening the valve by penetrating the cup-shaped member. This preliminary closed state ensures no leakage can occur until the correct cartridge is installed and the valve is intentionally opened.
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 proper dispensing of hand hygiene products by preventing fluid leakage from mismatched cartridges and maintaining hygiene compliance by ensuring only compatible products are used, thus enhancing operational effectiveness.
Implementation Method 1
a cup shaped member of elastomeric material, said member having a curved top having at least one slit having two slit edges, said slit defining a valve which is normally closed when the two slit edges are in mutual contact, but which slit edges separate when the curved top is penetrated
Data Source
AI summary
A dispensing system for dispensing cleaning product for hand sanitization comprises a cartridge having an internal reservoir for containing hand sanitization product, a nozzle configured in one of a plurality of key shapes, and a dispenser having a receptacle opening adapted to receive and engage the nozzle of the cartridge when the receptacle opening is configured in one of a plurality of key shapes corresponding to the key shape of the nozzle, the dispenser having a fluid communication passage for dispensing fluid for hand washing, whereby only cartridges and dispensers which have matched key shapes will engage each other for operative discharge of the hand wash cleaning product. The system includes a valve insert member which prevents leakage of fluid unless the nozzle key matches the receptacle opening. The valve insert member is in the form of a cup shaped member of elastomeric material, said member having a curved top having at least one slit having two slit edges, said slit defining a valve which is normally closed when the two slit edges are in mutual contact, but which slit edges separate when the curved top is penetrated, to thereby open the valve. Two slits can be provided in a cross-pattern.