Peristaltic Injection Pump Layout for Large-Volume Viscous Fluids
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Solution Overview
Problem
Existing fluid product injection devices are bulky, cumbersome, and prone to contamination, especially when dealing with large volumes or viscous fluids, and often require multiple reservoirs, incorporating complex electronics that are typically disposable.
Innovation Solution
A modular injection device comprising a selector module, reservoir module, and reusable electronic module, with a peristaltic pump system for fluid distribution, minimizing material contact and allowing for compact design and recyclability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional syringe-based autoinjectors are used for large volumes or viscous fluids, then the device can deliver the fluid product, but the device becomes bulky, heavy, and cumbersome
Solution Approach 1:
The device is divided into separate functional modules: a reusable electronic module containing the motor and control circuitry, and a disposable reservoir module containing the syringe and tubing. This segmentation allows the heavy components to be separated from the fluid-containing elements, reducing the weight that must be carried during fluid delivery.
Solution Approach 2:
The traditional manual or spring-based actuation mechanism is replaced with an electronic motor-driven piston system. The motorized actuation allows for more efficient fluid delivery of viscous or large volumes without requiring the bulky mechanical components needed for manual operation.
2Adaptability or versatility
If multiple reservoirs and complex actuation systems are used to combine several fluid products, then the device can perform complex treatments, but the device complexity increases
Solution Approach 1:
The electronic module is designed with universal control capabilities that can manage multiple reservoirs and fluid products through software control. The single motor-driven piston system can sequentially or simultaneously access multiple reservoirs, enabling complex treatment protocols without requiring separate mechanical actuation systems for each fluid.
Solution Approach 2:
Complex mechanical switching mechanisms for selecting between multiple fluid products are replaced with an electronic control system. The microprocessor controls the motor's operation to selectively access different reservoirs through electronic signal sequencing, simplifying the mechanical structure while maintaining versatility.
3Adaptability or versatility
If numerous different materials are used between reservoir outlet and injection needle, then the device can accommodate various fluid types, but the risk of fluid product contamination increases
Solution Approach 1:
The tubing and internal passages are designed with specific local properties - using materials and configurations that are chemically inert and compatible with pharmaceutical fluids. The peristaltic pump's rotating element provides localized mixing and transport without requiring numerous different materials in the fluid path, reducing contamination interfaces.
Solution Approach 2:
The peristaltic pump's rotating element acts as an intermediary that moves fluid through a single, controlled pathway without requiring multiple material interfaces. This intermediary mechanism reduces the number of potential contamination points while maintaining the ability to handle various fluid types through controlled peristaltic action.
4Extent of automation
If complex electronic components are integrated into the disposable device, then the device can provide precise control, but the manufacturing cost and assembly complexity increase
Solution Approach 1:
The device is segmented into a reusable electronic module containing all automated control components and a simple disposable reservoir module. This segmentation allows the complex electronics to be manufactured and assembled once and reused, while the disposable portion can be manufactured simply and assembled quickly, reducing overall manufacturing complexity and cost.
Solution Approach 2:
The complex electronic components are recovered and reused across multiple devices, while only the simple disposable reservoir module is discarded after use. This approach concentrates the manufacturing and assembly complexity into a single reusable unit that is produced once and then reused, significantly reducing the per-use manufacturing burden and cost.
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
Enables efficient dispensing of large volumes and viscous fluids with reduced material contact, ensuring device compactness, reusability, and cost-effectiveness while maintaining product integrity.
Implementation Method 1
A modular injection device comprising a selector module, reservoir module, and reusable electronic module, with a peristaltic pump system for fluid distribution
Data Source
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AI summary
Disclosed is a fluid product injection device comprising a body that is to come into contact with an injection site (SI), at least one fluid product vessel (210), an injection needle (120) that is to penetrate the injection site (SI) to inject the contents of one or more vessels (210), a priming needle (125) that is associated with each vessel (210) and is to penetrate the vessel (210) before the fluid product is dispensed, each vessel (210) comprising a tube (145), one end of which is connected to the associated priming needle (125) and the other end of which is connected to a collector (140) that is connected to the injection needle by means of a tube portion (148), the disclosed device further comprising a peristaltic pump comprising a ring (150) that is rotatably mounted on a crankshaft (131), said ring (150) rotating about an axis of rotation (Y), offset from the axis of rotation (X) of the crankshaft (131), so as to progressively compress the tube portion (148) extending about the crankshaft (131).