Microfluidic Clamping Chamber for Uniform Pressure Sealing
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Solution Overview
Problem
Existing microfluidic device clamping methods face challenges in achieving uniform sealing and pressure control, particularly with mechanical systems requiring precise geometries and chemical adhesion methods being limited by material compatibility and pressure ranges.
Innovation Solution
A clamping apparatus and method using a fluid-tight chamber with a perfusion fluid management system and pressure controllers to ensure a higher pressure of the clamping fluid than the perfusion fluid, allowing for uniform and omnidirectional compression of deformable parts, ensuring optimal sealing and preventing leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If mechanical systems (rigid plates with bolts, C-clamp, magnets, or shafts and levers) are used to clamp the microfluidic device, then the clamping force can be applied, but the structure becomes complex and access to the microfluidic device is limited
Solution Approach 1:
The patent replaces complex mechanical clamping systems (bolts, C-clamps, magnets, shafts, and levers) with a fluid-based clamping system. A fluid-tight chamber is filled with a clamping fluid (gas or liquid) that applies uniform pressure to the microfluidic device through a deformable membrane, eliminating the need for mechanical fasteners and complex geometries while maintaining effective clamping force.
Solution Approach 2:
The invention uses pneumatic or hydraulic principles by introducing a clamping fluid (gas or liquid) into a sealed chamber to generate clamping force. The fluid pressure is transmitted uniformly through the deformable membrane to compress the microfluidic device, providing simple and effective clamping without mechanical complexity.
2Device complexity
If chemical adhesion methods are used to clamp the microfluidic device, then the structure can be simplified, but the method is limited in terms of compatible materials and admissible pressure ranges
Solution Approach 1:
The patent introduces a deformable membrane as an intermediary element between the clamping fluid and the microfluidic device. This membrane can be made of flexible materials that are compatible with various microfluidic device configurations and materials, while the clamping fluid transmits pressure uniformly through the membrane to achieve effective clamping across different material types and pressure ranges.
3Manufacturing precision
If mechanical systems are used to achieve uniform clamping pressure, then precise and sturdy geometries are required, but the device complexity increases and access for monitoring is restricted
Solution Approach 1:
The patent replaces precise mechanical geometries with a fluid-pressure-based system. The clamping fluid pressure is transmitted uniformly through the deformable membrane, creating uniform clamping force and sealing without requiring precise mechanical adjustments or complex geometries. This approach simplifies the system while maintaining manufacturing precision.
Solution Approach 2:
The invention changes the clamping mechanism from mechanical geometry-based to pressure-based. By controlling the pressure of the clamping fluid and the elasticity of the deformable membrane, uniform clamping force is achieved dynamically, eliminating the need for precise mechanical geometries and allowing for flexible adaptation to different microfluidic device configurations.
4Reliability
If high pressure is applied to clamp the microfluidic device, then sealing is improved, but leaks and breakage may occur under high working pressures
Solution Approach 1:
The deformable membrane serves as a protective intermediary that distributes clamping pressure uniformly across the microfluidic device. This membrane layer prevents stress concentration that could lead to breakage, while still providing effective sealing. The membrane's elasticity allows it to accommodate pressure variations without transmitting harmful stress to the device structure.
Solution Approach 2:
The patent uses the elastic properties of the deformable membrane to dynamically respond to pressure changes. The membrane deforms elastically under clamping pressure to ensure uniform contact and sealing, while returning to its original shape when pressure is released, preventing permanent deformation or breakage of the microfluidic device even under high working pressures.
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 apparatus provides uniform clamping force across the microfluidic device surface, preventing leaks and breakage, even under high working pressures, while allowing access for monitoring and active systems, and enabling simultaneous clamping of multiple devices.
Implementation Method 1
the chamber being configured to receive a microfluidic device to be clamped by compression of at least one deformable part of the microfluidic device under the action of a pressure of a clamping fluid in the chamber
Implementation Method 2
compression of at least one deformable part of the microfluidic device under the action of a pressure of a clamping fluid in the chamber
Data Source
AI summary
An apparatus suitable for clamping at least one microfluidic device, which includes (i) a fluid-tight chamber having a fluid inlet, the chamber being configured to receive a microfluidic device to be clamped by compression of at least one deformable part of the microfluidic device under the action of a pressure of a clamping fluid in the chamber, and (ii) a perfusion fluid management system configured to adjust the pressure of a perfusion fluid in the microfluidic device in such a way that, during a clamping operation, the pressure of the clamping fluid in the chamber is strictly higher than the pressure of the perfusion fluid in the microfluidic device.