Chromatography Column Positioning Assembly With Adjustable Face-Seal Spacing
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Solution Overview
Problem
Conventional fluidic connections for liquid chromatography columns using nuts and ferrules are challenging to create and undo, prone to damage, and require precise positioning of face seals to ensure proper loading force, which is difficult to achieve with varying column lengths.
Innovation Solution
The use of chromatography column positioning assemblies that include extenders, spacers, and adjustable end caps to maintain consistent spacing between face seals, ensuring proper loading force and fluid tight connections for columns of varying lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional fluidic connections using nuts and ferrules are used, then flexibility in positioning the chromatography column is achieved, but the connection is challenging to create and undo and prone to damage
Solution Approach 1:
The patent extracts the problematic nut and ferrule components from the connection system and replaces them with a simplified face seal mechanism. The face seal directly contacts the column end without requiring separate ferrules or nuts, eliminating the complex assembly and disassembly steps while maintaining reliable sealing through the dedicated face seal geometry.
Solution Approach 2:
The face seal acts as an intermediary element between the column end and the connection hardware. This intermediate component provides a dedicated sealing surface that simplifies the connection process while ensuring reliable fluidtight sealing, resolving the contradiction between ease of operation and connection reliability.
2Reliability
If face seals are positioned to ensure proper loading force, then seal integrity is maintained, but precise positioning is difficult to achieve with varying column lengths
Solution Approach 1:
The spacer is pre-configured with the exact length required to position the face seal at the correct distance from the column end. This preliminary preparation of the spacer eliminates the need for precise positioning during assembly, as the spacer inherently provides the correct spacing for proper loading force and seal integrity regardless of column length variations.
Solution Approach 2:
The spacer serves as an intermediary component that mediates between the face seal and the column end, ensuring proper spacing and loading force. This intermediate element absorbs the complexity of precise positioning, allowing the face seal to maintain integrity without requiring difficult precise positioning during assembly.
3Adaptability or versatility
If extenders are used to accommodate varying column lengths, then adaptability is improved, but device complexity increases
Solution Approach 1:
The positioning assembly is segmented into modular components (spacer, extender, face seal) that can be independently selected and combined. The extender is a separate module that can be added to the spacer-facce seal assembly when longer columns are used, providing adaptability while keeping each individual component simple and the overall assembly straightforward.
Solution Approach 2:
The extender is designed to be nested within or attached to the spacer-facce seal assembly, creating a compact integrated unit when needed. This nesting approach allows the system to accommodate varying column lengths without permanently increasing device complexity, as the extender only becomes part of the assembly when required for longer columns.
Data Source
AI summary
The exemplary embodiments provide chromatography column positioning assemblies that can ensure that the distance between face seals or other sealing surfaces/mechanisms at the respective ends of a liquid chromatography column is a desired distance (i.e., the length of the liquid chromatography column). The exemplary embodiments can adjust the separation between the face seals to accommodate different length liquid chromatography columns. For example, a chromatography column positioning assembly of an exemplary embodiment can set the distance between face seals to accommodate a 25 mm column, a 50 mm column or a 100 mm column.