Dispensing Assembly with Impulse Generator for Sensitive Fluids
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Solution Overview
Problem
Current fluid dispensing technologies in medical laboratories lack precision and reproducibility, especially when handling sensitive biological samples, due to inadequate control over fluid volume and impulse application, which can damage fragile components like stem cells.
Innovation Solution
A dispensing assembly comprising a cartridge holder with an adjustable reservoir, a nozzle, an actuator, and an impulse generator, controlled by a controller to force a predetermined volume of fluid through the nozzle and impart impulses to ensure accurate and reproducible dispensing, even with sensitive fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional fluid dispensing technologies are used, then the dispensing process is simple, but precision and reproducibility are insufficient
Solution Approach 1:
The dispensing system is segmented into distinct functional modules: a cartridge holder for precise positioning, an adjustable reservoir for controlled fluid storage, a nozzle for targeted dispensing, an actuator for volume control, and an impulse generator for consistent ejection. This segmentation allows each component to be optimized independently for precision while maintaining overall system manageability.
Solution Approach 2:
The system incorporates dynamic elements including an adjustable reservoir volume that can be modified to force predetermined fluid volumes through the outlet, and an impulse generator that applies controlled impulses to the nozzle. These dynamic adjustments enable precise control over fluid dispensing parameters without requiring complete system redesign for different applications.
2Reliability
If high impulse is applied to ensure fluid dispensing, then dispensing reliability is improved, but shear forces increase damaging fragile components
Solution Approach 1:
The impulse generator applies periodic, controlled impulses to the nozzle rather than continuous high-force pressure. This periodic action ensures reliable fluid ejection through the orifice while limiting the duration and intensity of each impulse, thereby reducing cumulative shear force exposure on sensitive biological components within the fluid.
Solution Approach 2:
The system allows adjustment of impulse parameters (magnitude, duration, frequency) to optimize the balance between dispensing reliability and shear force minimization. By changing these parameters, the system can adapt to different fluid types and sensitivity requirements without compromising either reliability or component integrity.
3Measurement precision
If manual calibration is performed for different fluids, then accuracy for specific fluids is improved, but time consumption and operational complexity increase
Solution Approach 1:
The dispensing assembly is designed with universal components that can handle various fluid types without requiring extensive recalibration. The adjustable reservoir volume, controllable actuator, and programmable impulse generator create a multi-functional system that maintains accuracy across different viscosities and surface tensions through electronic control rather than mechanical recalibration.
Solution Approach 2:
The system incorporates feedback mechanisms where the controller monitors and adjusts actuator and impulse generator operations based on dispensing outcomes. This feedback loop enables the system to automatically compensate for variations in fluid properties, maintaining precision without manual intervention for each fluid type.
4Manufacturing precision
If predetermined volume forcing is used, then volume precision is improved, but control over dispensing timing and impulse application becomes limited
Solution Approach 1:
The controller serves as an intermediary that coordinates between the volume-forcing function of the actuator and the impulse application of the impulse generator. This intermediary control layer receives input parameters and sequences the operation of both components, enabling the system to maintain predetermined volume precision while adding flexibility in timing and impulse characteristics through programmable control logic.
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
The solution enables precise and reproducible dispensing of fluids, reducing shear forces and extending the applicability to sensitive samples, such as stem cells, without the need for extensive calibration across different fluids, maintaining accuracy and precision across various viscosities and surface tensions.
Implementation Method 1
The reservoir can have an adjustable volume for forcing the fluid through the outlet
Implementation Method 2
The impulse generator can comprise an actor for contacting the nozzle
Data Source
AI summary
A dispensing assembly comprising a cartridge holder is presented. The cartridge holder can receive a cartridge for dispensing a fluid. The cartridge can comprise a reservoir for receiving the fluid. The reservoir can comprise an outlet. The reservoir can have an adjustable volume for forcing the fluid through the outlet. The cartridge can further comprise a nozzle for dispensing the fluid. The nozzle can be connected to the outlet. The dispensing assembly can further comprise an actuator for actuating the adjustable volume. The dispensing assembly can further comprise an impulse generator for imparting an impulse to the nozzle. The impulse generator can comprise an actor for contacting the nozzle. The dispenser assembly can further comprise a controller for controlling the actor and the impulse generator.