Syringe Filter With Segmented Membrane Seal
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Solution Overview
Problem
Conventional syringe filter designs face issues such as high scrap rates, labor-intensive inspection processes, inconsistent product appearance, contamination of raw materials, fragile connection ports, low burst pressure leading to filter failure, and reduced analysis integrity.
Innovation Solution
A syringe filter design featuring a filter membrane positioned between inlet and outlet fluid distribution surfaces with securement rings and grooves, angular profiles, and toothed surfaces to resist rotational movement and form a fluid-tight seal, along with concentric distribution pathways to enhance fluid flow and prevent blockage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional syringe filter design is used, then basic filtration function is provided, but high scrap rates and labor-intensive inspection processes occur
Solution Approach 1:
The syringe filter is divided into separate components (cap, body, membrane, seal) that can be manufactured independently and assembled. This segmentation allows for specialized manufacturing processes for each component, reducing overall scrap rates and simplifying quality inspection.
Solution Approach 2:
The design incorporates self-aligning and self-sealing features that reduce the need for manual inspection and adjustment during assembly. The membrane is pre-positioned with alignment features that guide proper installation, eliminating labor-intensive inspection steps.
2Manufacturing precision
If conventional syringe filter design is used, then filtration is provided, but inconsistent product appearance occurs
Solution Approach 1:
The cap and body incorporate asymmetric alignment features including an off-center ridge and corresponding groove, along with asymmetric seal engagement surfaces. This asymmetry ensures consistent orientation during assembly, guaranteeing uniform product appearance while maintaining a relatively simple overall design.
3Reliability
If conventional syringe filter design is used, then basic filtration is provided, but connection ports are fragile and subject to breakage
Solution Approach 1:
The connection port is designed with a recessed seating area and surrounding rib structure that distributes mechanical stresses before they reach the critical bonding interface. This pre-cushioning design protects the fragile connection port from breakage during handling and use.
4Reliability
If conventional syringe filter design is used, then filtration is provided, but low burst pressure leads to filter failure
Solution Approach 1:
The syringe filter employs a composite construction combining a porous filtration membrane bonded to a non-porous support layer, which is then integrated with the cap and body housings. This composite structure distributes pressure loads across multiple materials with complementary properties, significantly increasing burst pressure and preventing filter failure while maintaining reliable particulate removal.
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 design reduces manufacturing costs, minimizes blockages and filter failures, and maintains analysis integrity by providing a more efficient and reliable filtration process.
Implementation Method 1
the compressed ring and toothed surface is configured to resist rotational movement of the first fluid distribution surface relative to the second fluid distribution surface
Implementation Method 2
the membrane being configured to remove at least one particulate from a fluid moving from the first fluid distribution surface, across the membrane, to the second fluid distribution surface
Implementation Method 3
a first plurality of distribution pathways formed on the first fluid distribution surface, the first plurality of distribution pathways configured to direct fluid flow from the inlet port toward the first perimetric edge of the first fluid distribution surface
Data Source
Figure 1~2
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AI summary
A syringe filter for containing a filter membrane is disclosed and includes first and second fluid distribution surfaces configured to be positioned on opposing sides of a membrane. An inlet port is in fluid communication with the first fluid distribution surface and a first plurality of distribution pathways formed on the first fluid distribution surface. An outlet port is in fluid communication with the second fluid distribution surface and a second plurality of distribution pathways formed on the second fluid distribution surface. The first plurality of distribution pathways is configured to distribute fluid flow from the inlet port to one side of the membrane while the second plurality of distribution pathways is configured to direct fluid flow from another side of the membrane to the outlet port.