Automated Sample Tube Decapping With Adaptive Gripper Latch
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Solution Overview
Problem
Existing automated systems for removing caps from sample tubes in biological testing are complex, require additional cleaning operations, and often cannot accommodate varying sample tube heights and cap sizes.
Innovation Solution
A decapping device with a gripper mechanism and latch mechanism that automatically adjusts to varying tube and cap sizes, using a single motor to drive multiple components for efficient cap removal without pre-configuration, and a routing device for automated alignment and handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automated cutting or puncturing processes are used to remove caps, then cap removal can be automated, but additional cleaning operations are required to wash the blade, needle, and/or probe
Solution Approach 1:
The patent extracts the cap removal function from the sample tube and performs it separately using a dedicated decapping device. The latch mechanism engages with the cap's rim to pull it off, completely avoiding the use of blades, needles, or probes that would require cleaning. This separates the cap removal operation from the sample analysis pathway, eliminating contamination risks and cleaning requirements.
2Adaptability or versatility
If automated cap removal processes are designed to accommodate multiple sample tube heights, then versatility is improved, but system complexity increases
Solution Approach 1:
The latch mechanism is designed with universal adaptability to work with caps of various sizes and sample tube heights. The latch arm can engage with the rim of different cap types through a standardized engagement geometry, while the gripper mechanism can adjust to hold tubes of varying heights. This universal design achieves versatility without requiring complex adjustment mechanisms or multiple specialized components.
Data Source
AI summary
A decapping device may be integrated with an automated biochemical analyzer or biological testing system to aid in sample testing. The exemplary decapper, includes a motor that is operable to lower a latch mechanism to engage with a cap of a sample tube and then raise the latch mechanism to remove the engaged cap. As the latch mechanism is lowered, a retractor portion also descends and causes a set of grippers to extend and grip the sample tube. As the latch mechanism is raised, the set of grippers apply a corresponding pressure to hold the sample tube in place while the cap is removed. Once removed, the cap rests within the latch mechanism and the set of grippers are retracted by the raising retractor. As the latch mechanism returns to its origin position, an ejector arm is operated causing the cap to be ejected from the latch mechanism.