Nested Syringe Cartridge for High-Volume Viscous Material Dispensing
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Solution Overview
Problem
Existing syringe systems are limited in their ability to accurately dispense larger volumes of viscous materials due to the mechanical advantage being suited for smaller volumes, necessitating a solution for delivering higher volumes of material in medical applications like dentistry.
Innovation Solution
A cartridge design with a plunger end of smaller external diameter and a piston end of larger internal diameter, allowing it to fit within a syringe with a smaller breach opening, enabling the dispensing of a larger volume of material through a nozzle using a syringe with mechanical advantage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a cartridge with a larger diameter piston end is used to contain larger volume of material, then the volume of material that can be dispensed is increased, but the cartridge cannot fit within the breach opening of the syringe
Solution Approach 1:
The cartridge is divided into two distinct sections: a plunger end with a smaller outer diameter that fits within the breach opening, and a piston end with a larger internal diameter that contains the material. This segmentation allows each part to serve its specific function while resolving the contradiction between fitting constraints and volume requirements.
Solution Approach 2:
The smaller diameter plunger end is positioned within the larger diameter piston end, creating a nested configuration. The plunger end acts as an outer shell that fits within the syringe breach, while the piston end extends inward to provide the larger internal volume needed for material storage.
2Measurement precision
If a syringe with mechanical advantage is used to precisely deliver material, then the precision of material placement is improved, but the volume of material that can be delivered is limited
Solution Approach 1:
The syringe system is segmented into a delivery mechanism (syringe with mechanical advantage for precision) and a storage mechanism (cartridge with large volume piston end). This allows the syringe to maintain its precision-delivery function while the cartridge provides expanded material capacity.
Solution Approach 2:
The cartridge design enables the syringe system to perform multiple functions: the plunger end maintains the mechanical advantage for precise delivery, while the piston end provides large-volume material storage, making the system universal for both precision and high-volume applications.
Data Source
AI summary
A cartridge having a plunger cylinder with an external diameter smaller than a piston cylinder internal diameter. The cartridge has a plunger cylinder adapted to fit within a breach opening of a syringe. The piston cylinder having a larger internal diameter than the external diameter of the plunger cylinder, the cartridge is capable of holding a larger volume of material in the piston cylinder than could be held in the plunger cylinder fitted within the syringe breach opening. A piston placed in the piston cylinder has a concave surface.