Test Tube Vacuum Retainer for Vibration Resistance
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Solution Overview
Problem
Existing methods for retaining test tubes in holders are ineffective due to reliance on passive friction and gravity, leading to potential ejection and sample loss during vibrations, especially in environments with vibration or microgravity.
Innovation Solution
A test tube vacuum retainer system that uses a partial vacuum to actively secure test tubes through a sealant ring and vacuum tube connected to a vacuum pump, eliminating the need for reliance on gravity and passive friction, allowing for secure retention across various tube diameters and orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retaining springs apply side pressure to keep test tubes in position, then the test tubes can be retained in the carrier, but the upward force exerted by the springs causes test tubes to move upward and potentially be ejected during vibration
Solution Approach 1:
The patent replaces the mechanical spring-based retention system with a vacuum-based retention system. The vacuum pump creates a pressure differential that holds the test tube against the carrier base, eliminating the upward force problem inherent in spring mechanisms. The vacuum force acts uniformly to press the test tube downward onto the carrier surface, preventing vibration-induced ejection.
Solution Approach 2:
The patent employs pneumatic principles by using a vacuum pump to create a partial vacuum environment within the carrier. The pressure differential between the vacuum chamber and atmospheric pressure generates a holding force that secures the test tube in place. This pneumatic retention mechanism provides stable, vibration-resistant holding without the mechanical contact and upward force issues of spring systems.
2Device complexity
If reliance is placed on passive friction and gravity to retain test tubes, then the system structure can be simple, but the retention is ineffective in microgravity or vibrating environments
Solution Approach 1:
The patent introduces a vacuum-based pneumatic retention system that creates a pressure differential to hold test tubes. This system works reliably in both gravity and microgravity environments because the vacuum force acts independently of gravitational direction. The vacuum pump maintains a partial vacuum that presses the test tube against the carrier base, providing consistent retention regardless of orientation or gravitational conditions.
Solution Approach 2:
The patent changes the physical parameter of pressure by creating a partial vacuum environment. By reducing the pressure inside the carrier relative to atmospheric pressure, a net downward force is created on the test tube that ensures retention. This parameter change allows the system to function reliably across different gravitational environments where friction and gravity-based retention would fail.
3Reliability
If the carrier vibrates, then the test tube tends to move upward and may be ejected, but eliminating vibration sources is not always effective or practical
Solution Approach 1:
The vacuum retention system creates a counteracting force that opposes the upward motion tendency during vibration. The pressure differential generated by the vacuum pump produces a downward holding force that balances and counteracts the inertial forces generated during vibration, preventing test tube ejection without requiring vibration elimination.
Solution Approach 2:
The patent uses pneumatic pressure control to provide active retention that adapts to vibrating conditions. The vacuum system maintains a pressure differential that actively holds the test tube in place, providing a stabilizing force that counteracts vibration effects. This allows the system to operate reliably in environments where vibration cannot be eliminated.
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 system reduces the risk of test tube displacement and sample loss due to vibrations, enhances reliability, and allows for versatile use in different environments, including microgravity, by actively retaining test tubes without relying on gravity or stringent vibration control.
Implementation Method 1
a vacuum pump configured to apply a vacuum force to the test tube holder
Data Source
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AI summary
Embodiments can provide a test tube vacuum retainer system, comprising an outer body comprising a midline plate; one or more side walls, a bottom wall, and a top plate comprising an access hole; a test tube holder comprising a sealant ring; a base; and a vacuum tube comprising an external outlet; wherein the test tube holder is secured within the outer body to the base, which in turn is secured to the midline plate; wherein the vacuum tube is connected to the test tube holder at a first end, and the external outlet is configured to be connected to a vacuum pump configured to apply a vacuum force to the test tube holder when a test tube is inserted into the access hole and placed onto the test tube holder.