Pneumatic Fluidic Device for Precise Liquid Dispensing
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Solution Overview
Problem
Existing liquid-filled blister packs for laboratory on a chip devices face challenges in accurately and precisely controlling the amount of liquid expelled, which is crucial for medical diagnostic tests, and mechanical solutions are costly and complex, making them unsuitable for point of care applications.
Innovation Solution
A fluidic device that controls the expulsion of liquid by increasing pressure in a chamber via an inlet, eliminating the need for collapsing the chamber, allowing for precise and accurate dispensing of predetermined amounts of liquid without dead volumes, and is compatible with laboratory on a chip devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual pressing is used to expel liquid from a collapsible chamber, then the device complexity is reduced, but the precision and accuracy of liquid amount control deteriorates
Solution Approach 1:
The patent replaces the manual mechanical pressing system with a pneumatic system that uses pressurized gas to expel liquid. The gas delivery system with controlled pressure delivery provides precise control over liquid expulsion amount without requiring complex mechanical pressing mechanisms, thus maintaining low device complexity while improving liquid amount control precision.
Solution Approach 2:
The patent employs pneumatic pressure to expel liquid from the chamber. A gas delivery system delivers pressurized gas to the liquid, using the pneumatic pressure to control the amount of liquid expelled. This approach eliminates the need for manual mechanical pressing while providing accurate and precise control over liquid dispensing.
2Manufacturing precision
If mechanical pressing machine is used to expel liquid from a collapsible chamber, then the precision and accuracy of liquid amount control improves, but the cost and complexity of the device increases
Solution Approach 1:
The patent replaces complex mechanical pressing machines with a simpler pneumatic system. The gas delivery system uses pressurized gas to achieve precise liquid control without requiring mechanical pressing mechanisms, thereby maintaining high precision while reducing device complexity and cost.
Solution Approach 2:
The patent introduces pressurized gas as an intermediary to transfer energy for liquid expulsion. Instead of direct mechanical contact, the gas acts as a mediator that delivers controlled pressure to expel liquid, achieving precise control with simpler equipment compared to direct mechanical pressing.
3Volume of moving object
If a collapsible chamber is used to store and dispense liquid, then the device compactness is improved, but the control of liquid amount expelled deteriorates
Solution Approach 1:
The patent uses pneumatic pressure delivery to control liquid expulsion from the compact chamber. The gas delivery system provides precise control over the amount of liquid expelled by regulating gas pressure, maintaining the compact chamber design while achieving accurate liquid dispensing without relying on chamber collapse.
Solution Approach 2:
The patent replaces the mechanical collapse mechanism with a pneumatic pressure system. Instead of mechanically collapsing the chamber to expel liquid, pressurized gas is used to push liquid out through a needle, maintaining chamber compactness while improving liquid amount control precision.
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 fluidic device ensures accurate and precise liquid dispensing, reduces costs and complexity, and is compact, suitable for point of care applications, enabling reliable medical diagnostic tests.
Implementation Method 1
increasing a first pressure in a first chamber via a first inlet urges at least a part of a predetermined first amount of a first fluid through a first outlet
Data Source
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AI summary
A fluidic device (10) is described. The fluidic device (10) comprises the first part (110) and the second part (120). The first part (110) comprises a first inlet (111) and a first outlet (112), mutually spaced apart. The second part (120) comprises a first chamber (121) arranged to contain a predetermined first amount A1 of a first fluid F1 therein and a first wall portion (122) arranged to contain, at least in part, the first fluid F1 in the first chamber (121). The fluidic device (10) is arrangeable in a first configuration, wherein the first part (110) is fluidically isolated from the first chamber (121). The fluidic device (10) is arrangeable in a second configuration, wherein the first inlet (111) and the first outlet (112) are fluidically coupled via the first chamber (121), whereby increasing a first pressure P1 in the first chamber (121) via the first inlet (111) urges at least a part of the predetermined first amount A1 of the first fluid F1 through the first outlet (112).