Rotating Core Material Transfer Device for Air-Sensitive Samples
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Solution Overview
Problem
Existing material transfer devices are not cost-effective and lack compatibility for safely transferring air-sensitive samples between instruments, such as electron microscopes, while maintaining a protected environment.
Innovation Solution
A material transfer device comprising a shell assembly and a core that can rotate relative to each other to seal or expose a material holder, allowing for secure transfer and protection of samples within a chamber, with the core being driven by a rotation shaft and sealed using members like O-rings to prevent air exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a material transfer device is designed to seal and protect air-sensitive samples during transfer, then sample protection reliability is improved, but device complexity increases
Solution Approach 1:
The device is divided into distinct functional modules: a rotatable core containing the material holder, a shell assembly with chamber, and sealing members positioned at specific locations. This segmentation allows each component to perform its specific function (holding, sealing, protecting) independently, achieving reliable sample protection through modular design rather than a monolithic complex structure.
Solution Approach 2:
Sealing members act as intermediaries between the chamber environment and the external atmosphere, creating a barrier that protects the sample without requiring the entire device structure to be complex. The sealing members enable controlled access to the sample while maintaining protection during transfer.
2Adaptability or versatility
If multiple instruments share a common transfer device, then compatibility and cost-effectiveness are improved, but the device must handle diverse requirements increasing design complexity
Solution Approach 1:
The transfer device is designed with universal features that enable it to interface with multiple different instruments (electron microscopes, FIB systems, ion milling systems). The standardized chamber-core-sealing architecture can accommodate various instrument requirements without requiring instrument-specific customization, achieving multi-instrument compatibility through a unified design approach.
3Productivity
If the core rotates to seal and expose the material holder, then transfer efficiency is improved, but mechanical precision requirements increase
Solution Approach 1:
The sealing members are pre-positioned at specific locations on the shell assembly before the core rotation begins. This preliminary positioning ensures that when the core rotates to its sealed position, the sealing members are already in place to immediately engage with the core's sealing surfaces, reducing the precision burden during the actual rotation operation.
Data Source
AI summary
A material transfer device includes a shell assembly and a core. The shell assembly has a chamber and an opening. The opening is in communication with the chamber. The core is arranged in the chamber and includes a material holder. The shell assembly and the core are configured to rotate relative to each other to seal the material holder inside the chamber or expose the material holder via the opening.