Dispenser Cartridge Ramp Coupling for Secure Piston Alignment
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Solution Overview
Problem
Existing fluid dispensers face challenges in ensuring proper alignment and secure coupling of movable elements with actuator assemblies, leading to difficulties in dispensing fluids efficiently and allowing for a wide variety of cartridge shapes and sizes, which complicates the replacement process.
Innovation Solution
The implementation of a resilient member in the cartridge and actuator mechanism that requires deformation for coupling and uncoupling, along with a guiding or ramp mechanism to facilitate proper alignment and secure coupling, limits the acceptable shapes and sizes of cartridges and ensures easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex coupling mechanism is used to secure the movable element to the actuator assembly, then the reliability of coupling is improved, but the device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent employs a resilient member (flexible element) that deflects during insertion to engage with the actuator assembly. This flexible component provides reliable coupling through elastic deformation, eliminating the need for complex mechanical interlocks while maintaining secure attachment. The resilient member's ability to deform and recover ensures reliable engagement with simple geometry.
Solution Approach 2:
Instead of using a complex locking mechanism that actively secures the cartridge, the patent inverts the approach by using a resilient member that passively engages through its own elastic properties. The coupling reliability arises from the material's inherent resiliency rather than from complex mechanical features, simplifying the overall device structure.
2Reliability
If precise alignment is required for proper coupling of the movable element with the actuator assembly, then the reliability of dispensing is improved, but the ease of operation deteriorates
Solution Approach 1:
The resilient member is pre-configured with specific geometric features (such as inclined surfaces or engagement zones) that guide it into proper alignment with the actuator assembly during insertion. This preliminary geometric guidance ensures correct positioning before the elastic engagement occurs, eliminating the need for user precision while maintaining reliable coupling.
Solution Approach 2:
The flexibility of the resilient member allows it to accommodate minor misalignments during insertion through elastic deformation. As the cartridge is inserted, the resilient member deflects to absorb positioning tolerances and then engages securely in the correct position, ensuring reliable dispensing without requiring precise user alignment.
3Adaptability or versatility
If the coupling mechanism allows a wide variety of cartridge shapes and sizes, then the adaptability is improved, but the reliability of proper alignment deteriorates
Solution Approach 1:
The resilient member's elastic properties enable it to adapt to variations in cartridge geometry through controlled deformation. Different cartridge shapes and sizes can engage the same actuator assembly because the resilient member deflects to accommodate the specific dimensions of each cartridge while maintaining reliable coupling through its recovery force.
Solution Approach 2:
The actuator assembly is designed with a universal engagement interface that works with multiple cartridge configurations. The resilient member serves multiple functions: guiding alignment, accommodating dimensional variations, and securing the connection. This universal design allows the same mechanism to reliably couple diverse cartridge types without requiring precise alignment for each variant.
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
This solution ensures proper alignment and secure coupling of cartridges with the actuator mechanism, preventing radial movement unless the resilient member is deflected, thereby simplifying the replacement process and maintaining efficient fluid dispensing.
Implementation Method 1
the cartridge including a resilient member which prevents radial movement relative to a catch member of the housing from a coupled orientation unless the resilient member is deflected from an unbiased inherent configuration
Implementation Method 2
there may be provided a ramp mechanism on the actuator plate such that a movable element in a radial uncoupled orientation on movement radially is moved to the axial uncoupled orientation as a result of engagement with the ramp mechanism
Data Source
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AI summary
An improved arrangement for removably coupling a replaceable cartridge (13) to a housing of a dispenser (10) with the cartridge carrying a piston pump with a movable piston element (57) to be coupled on insertion with an actuator plate(32) of the housing. A ramp mechanism is provided on the actuator plate to engage the piston element and during insertion of the cartridge into the housing move the piston element to a position relative the actuator plate which facilitates proper coupling including a resilient member (67) which prevents radial movement relative a catch member (100) of the housing from a coupled orientation unless the resilient member is deflected from an unbiased inherent configuration.