Reversible Flowcell Gasket Sealing via Pressure Dynamics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Biomedical applications face challenges in efficiently assembling and disassembling flow devices without disturbing biological samples or sensitive surfaces, as existing methods often require disassembly of the device to access internal components, which can be damaging.
Innovation Solution
The use of a gasket with a fluidic interface layer and a substrate layer, where the gasket is reversibly attached and forms a fluid-tight seal by wrapping its perimeter over the edges of the fluidic interface layer, allowing for easy assembly and disassembly by applying negative pressure or using release fluid channels to separate the gasket from the substrate layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device is assembled with traditional bonding methods, then the seal between layers is strong and reliable, but the device cannot be disassembled without damaging the sample or substrate layer
Solution Approach 1:
The gasket's attachment state is made dynamic rather than static. It can transition between attached and detached states based on applied pressure. During operation, negative pressure creates strong attachment for reliable sealing. During disassembly, positive pressure releases the attachment, enabling non-destructive separation while maintaining sample integrity
Solution Approach 2:
The attachment strength of the gasket is changed by varying pressure parameters. Negative pressure (vacuum) increases attachment strength for reliable sealing during assays. Positive pressure decreases attachment strength to enable easy disassembly. This parameter change allows the same gasket to provide both strong sealing and easy release
2Reliability
If the gasket is permanently bonded to the fluidic interface layer, then the seal is secure and leak-free, but the device complexity increases and assembly/disassembly becomes difficult
Solution Approach 1:
The sealing system is segmented into modular components: the gasket, the fluidic interface layer, and the substrate layer. The gasket wraps around the fluidic interface layer edges and can be attached or detached independently. This segmentation allows simple assembly by wrapping and attaching, and simple disassembly by releasing the attachment, reducing overall device complexity
Solution Approach 2:
The gasket attachment is made dynamic through pressure-controlled bonding. During assembly, negative pressure automatically bonds the gasket to the layers for secure sealing. During disassembly, positive pressure releases the bond. This dynamic behavior eliminates the need for permanent bonding mechanisms, simplifying the device structure
3Reliability
If the gasket perimeter is wrapped around the fluidic interface layer edges, then the seal is fluid-tight and reliable, but the disassembly process becomes challenging without disturbing internal components
Solution Approach 1:
The gasket's bond strength is dynamically controlled through pressure. During operation, negative pressure maintains strong bonding for fluid-tight sealing. During disassembly, positive pressure reduces bonding strength, allowing the gasket to be removed without disturbing the sample or substrate layer, thus eliminating harmful effects
Solution Approach 2:
Positive pressure is applied in advance during disassembly to counteract the negative pressure bonding, preventing the gasket from damaging the sample or substrate layer during removal. This preliminary anti-action neutralizes the harmful effect of strong attachment before disassembly begins
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 method enables secure and reversible sealing of the gasket between the fluidic interface and substrate layers, allowing for non-destructive access to internal components and samples, facilitating efficient assembly and disassembly of flow devices in biomedical applications.
Implementation Method 1
the gasket is reversibly attached and forms a fluid-tight seal by wrapping its perimeter over the edges of the fluidic interface layer
Implementation Method 2
allowing for easy assembly and disassembly by applying negative pressure or using release fluid channels to separate the gasket from the substrate layer
Implementation Method 3
The one or more portions of the gasket are bonded or mechanically fixed to the fluidic interface layer
Data Source
AI summary
Flowcell devices configured for reversible assembly, and methods of assembly, disassembly, and use thereof are provided. The methods and devices allow the interior of the flowcell device to be accessed without damaging, or otherwise disturbing sensitive samples and surfaces.