Pressurised Appliance Sampling Tip with Closable Orifice
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Solution Overview
Problem
Current pressurized devices for preparing culture media face issues with content overflow and sterility due to pressure and temperature changes, leading to potential spills and loss of prepared medium, posing safety and sterility concerns.
Innovation Solution
A pressurized device with a sampling nozzle that includes a cannula with closable orifices for pressure balance and a removable sampler that can be connected to a peristaltic pump, ensuring safe and sterile removal of the medium by maintaining pressure equilibrium and preventing spills.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lid is tightly closed and pressure increases during heating, then sterilization effectiveness is improved, but the risk of content spillage through the cannula increases
Solution Approach 1:
The sampling port is equipped with a cap that is placed beforehand to prevent the harmful effect of spillage before it occurs. The cap creates preliminary opposition to the pressure-driven spillage mechanism, blocking the escape path of contents while allowing the pressure build-up needed for sterilization to proceed safely.
Solution Approach 2:
The cap acts as an intermediary element between the pressurized contents and the external environment. It mediates the pressure relationship by providing a sealed interface that allows pressure transmission for sterilization while preventing the harmful spillage effect.
2Ease of operation
If the cap on the sampling port is not tightened properly or is missing, then operator safety and equipment protection are compromised, but the ease of accessing contents for removal is improved
Solution Approach 1:
The cap provides preliminary protection against steam leaks and spillage hazards before they can occur during heating. By requiring the cap to be in place during the heating phase, the system preemptively blocks the harmful effects while maintaining easy access capability when the cap is properly installed and secured.
3Reliability
If the lid movement exerts pressure on contents during closing, then sealing effectiveness is improved, but rapid content rise through the cannula occurs causing spillage
Solution Approach 1:
The cap on the sampling port provides preliminary opposition to the pressure-driven content rise caused by lid closing. It blocks the cannula opening beforehand, preventing the medium from rising and spilling while allowing the lid to exert necessary closing pressure for effective sealing.
4Stability of the object's composition
If the sampling port remains open during heating, then pressure equilibrium is maintained, but steam leak and content escape occur
Solution Approach 1:
The cap serves as an intermediary that manages the pressure relationship differently than a completely open port. It allows pressure equilibrium to be maintained through the sealed interface while simultaneously blocking the harmful effects of steam leakage and content escape that would occur with an open port.
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 solution effectively prevents spills and ensures the safety and sterility of the prepared culture media by maintaining pressure balance and allowing for easy, rapid removal of the contents, enhancing operator safety and simplifying maintenance.
Implementation Method 1
ensuring, when the lid is in its closed position and said orifice is open, pressure equilibrium between the inside of the cannula and the inside of the tank
Implementation Method 2
connects the sampling port to a peristaltic pump to draw the contents of the bucket through the cannula
Data Source
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AI summary
The invention relates to a pressurised appliance (10) comprising a chamber (34) for receiving a liquid content, and a cover (16) for closing the chamber in a closing position, said cover comprising a sampling tip (50), said tip comprising a cannula (52) that can be in contact with the content when the cover is in the closing position, the sampling tip having at least one closable opening (58) which allows, when the cover is in the closing position thereof and said opening is open, the maintenance of a pressure balance between the inside of the cannula and the inside of the chamber, and, when the cover is in the closing position thereof and said opening is closed, the sampling of the content via the cannula.