Syringe Plunger Hinged Flange Pump Compatibility
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Solution Overview
Problem
Syringe pumps used in gravity-feed systems face compatibility issues with metering pumps and require careful handling to prevent exposure to pathogens and foreign matter when venting, which can be compromised by modifications for hanging.
Innovation Solution
A syringe plunger with a hinged flange that can pivot between a down position for compatibility with metering pumps and an upright position for hanging, allowing for secure suspension without exposing the contents to contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hole or tether is provided on the flange for hanging the syringe, then the syringe can be hung for gravity-feed applications, but compatibility with metering pumps is negatively affected
Solution Approach 1:
The flange is designed to be movable relative to the plunger body, transitioning between a first position for metering pump compatibility and a second position for gravity-feed system hanging. This dynamic reconfiguration allows the same plunger to adapt to different system requirements without compromising reliability in either application.
Solution Approach 2:
The plunger assembly integrates multiple functions through the movable flange: it serves as both a metering pump-compatible component and a gravity-feed hanging mechanism. The flange can engage with metering pump mechanisms when in the first position and provide hanging capability when in the second position, making the device universal for both applications.
2Object-affected harmful factors
If the plunger is removed from the syringe body for venting, then vacuum development is prevented, but the plunger is exposed to pathogens and foreign matter
Solution Approach 1:
The flange's movable design allows it to transition between positions that maintain sealing for pathogen protection and positions that enable venting for operation. The dynamic reconfiguration permits the plunger to remain engaged with the syringe body while still providing necessary venting functionality through the flange's movement.
3Adaptability or versatility
If modifications are made to allow for hanging, then gravity-feed applications are enabled, but compatibility with metering pumps is compromised
Solution Approach 1:
The plunger is divided into distinct functional segments: a plunger body and a separate movable flange portion. This segmentation allows the flange to be independently positioned for hanging operations while the main plunger body remains compatible with metering pumps. The segmented design enables functional separation without requiring complete redesign of the entire plunger assembly.
Data Source
AI summary
A plunger for movably mounting within a cavity or barrel of a syringe. The plunger includes a contact face having a flange movably mounted thereto, wherein the flange is movable between an open configuration wherein an opening is formed between the flange and a portion of the plunger, the opening configured for engagement with an IV hook or other engagement member, and a closed configuration wherein the upper surfaces of the contact face and the flange are generally planar with one another.