Spin Filter With Porous Body Preventing Clogging

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Solution Overview

Problem

Conventional spin filters clog due to material accumulation, obstructing fluid flow and leading to prolonged processing times and sample loss, as the filter material is only permeable at the bottom end, limiting filtration efficiency.

Innovation Solution

Both the body and bottom end of the spin filter are made from porous or permeable material, allowing filtration through the sides if the bottom end becomes clogged, ensuring continuous fluid passage and preventing clogging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the filter material is only permeable at the bottom end, then the structure is simple and easy to manufacture, but the filter clogs due to material accumulation obstructing fluid flow

Engineering Contradiction:
Improvefiltration continuityVSAvoidfilter structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The filter body is constructed from porous material that allows fluid passage throughout its entire structure, not just at the bottom end. This porous construction enables alternative flow paths when material accumulation blocks the bottom outlet, maintaining filtration continuity and preventing complete clogging.

Inventive Principle:
Principle #31Porous materials

Solution Approach 2:

The invention transitions from a single-point filtration (bottom end only) to a distributed multi-dimensional filtration system. The porous body creates numerous alternative flow paths in three dimensions, allowing fluid to bypass blocked areas by traveling through different spatial routes within the filter structure.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Productivity

If the filter at the bottom end is the only permeable exit, then the manufacturing is simple, but the filtration stops when clogged, prolonging processing time and causing sample loss

Engineering Contradiction:
Improvefiltration efficiencyVSAvoidprocessing time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The porous filter body ensures continuous filtration action by providing multiple active filtration surfaces throughout the structure. When the bottom outlet becomes blocked, fluid flow and filtration continue uninterrupted through alternative paths within the porous matrix, eliminating downtime and maintaining productive operation.

Inventive Principle:
Principle #20Continuity of useful action

Solution Approach 2:

The distributed porous structure acts as a pre-prepared backup system that compensates for potential bottom-end clogging. Multiple alternative flow paths are built into the structure in advance, providing immediate relief when material accumulation threatens to block the primary filtration outlet.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

3Quantity of substance

If material accumulates on the filter, then separation is achieved, but the accumulated material forms a barrier to subsequent fluid flow, clogging the filter

Engineering Contradiction:
Improvematerial separationVSAvoidclogging
Core Design Contradiction:
Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The filtration function is segmented from a single concentrated location (bottom end) to multiple distributed locations throughout the filter body. This segmentation of the filtration surface allows material accumulation at one location to be compensated by active filtration surfaces at other locations, preventing complete flow blockage.

Inventive Principle:
Principle #1Segmentation

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 design enables uninterrupted filtration by providing additional filtration surfaces, reducing the risk of clogging and sample loss, and allowing for efficient separation of various sample sizes and types without the need for repositioning or redistributing the sample.

Implementation Method 1

the hollow body and bottom end of the spin filter assume any shape appropriate for the filtration application to which the filter is applied

Methodology Applied
Scientific EffectFiltration: Filter (physical)

Implementation Method 2

the hollow body is made from a porous filtering material

Methodology Applied
Scientific EffectPorosity: Porosity

Implementation Method 3

a centrifuge is used to apply an inertial force (a 'centrifugal force') on the solution or suspension and push it through the filter

Methodology Applied
Scientific EffectCentrifugal force: Centrifugal Force

Data Source

PatentUS8980107B2Spin filter
Publication Date: 2015.03.17 EXACT SCIENCES CORP
  • US8980107B2 patent drawing
  • US8980107B2 patent drawing
  • US8980107B2 patent drawing

AI summary

Provided herein is technology relating to filtration and particularly, but not exclusively, to filters and methods for filtering by means of centrifugation.