Rotary Dosing Device with Adjustable Chamber Volume
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Solution Overview
Problem
Existing dosing devices for small-particulate pharmaceutical preparations are complex, difficult to handle, and often require extensive packaging and testing due to moisture sensitivity, limiting their use for precise, patient-oriented dosing and requiring multiple fixed combinations.
Innovation Solution
A compact dosing device with a rotary dosing chamber that adjusts volume steplessly, allowing for precise and continuous dosing with easy handling, featuring a rotary valve that moves between filling and dispensing positions with offset feed openings and a horizontal axis of rotation, enabling individual dose adjustments based on body weight or diurnal needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotary valve with multiple dosing chambers is used to enable various dosages, then the adaptability of the device is improved, but the device complexity increases
Solution Approach 1:
The dosing chamber volume is made dynamically adjustable through a movable partition wall that can be positioned at different locations along the chamber axis. This allows a single chamber to serve multiple dosage requirements by changing its effective volume, eliminating the need for multiple fixed chambers while maintaining versatility across different dosing scenarios.
Solution Approach 2:
A single dosing chamber is designed to perform multiple functions by accommodating different volumes through the adjustable partition wall. This universal chamber can dose various amounts of pharmaceutical preparation depending on the partition position, replacing what would traditionally require multiple specialized chambers.
2Measurement precision
If the dosing chamber volume is made adjustable to enable precise dosing, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The partition wall is made movable rather than fixed, allowing the dosing chamber volume to be dynamically adjusted to match precise dosing requirements. This dynamic adjustment capability enables precise dosing measurements while using a simpler single-chamber design compared to multiple fixed chambers.
Solution Approach 2:
The effective volume parameter of the dosing chamber is made variable through the movable partition wall position. By changing the physical parameter of chamber volume through partition repositioning, the system achieves precise dosing control without requiring complex mechanisms or multiple chambers.
3Adaptability or versatility
If multiple fixed drug combinations are used to cover different dosages, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
A single dosing chamber serves as a universal component that can accommodate different dosage combinations by adjusting the partition wall position. This eliminates the need for multiple fixed combination chambers, reducing the number of components while maintaining the ability to dose various pharmaceutical preparations at different dosages.
4Ease of operation
If a compact design is used to improve handling, then the ease of operation is improved, but the dosing precision may be compromised
Solution Approach 1:
The movable partition wall provides a simple mechanical adjustment mechanism that maintains dosing precision even in a compact design. The partition can be repositioned along the chamber axis to define precise volumes, and this adjustment capability is maintained despite the reduced overall device size, ensuring both compactness and precision.
Solution Approach 2:
The dosing precision is maintained through careful design of the partition wall movement mechanism, which allows precise volume definition within a compact chamber. By controlling the partition position parameter accurately, the system achieves both compact dimensions and precise dosing capability.
Data Source
AI summary
A dosing device for dispensing small-particulate pharmaceutical preparations has at least one chamber for receiving a larger amount of the preparation and a dosing unit. A rotary valve has at least one dosing chamber for receiving a defined dose of the preparation. The dosing chamber is moveable between a filling position and a dispensing position. The rotary valve rotates about a substantially horizontal axis, and has an adjustment device for setting the volume in the dosing chamber and a twisting device. The twisting device constitutes the actuator for the adjustment device. The device is made of a plastic material carefully selected to assure that no softening agents or other volatile components will be released, which prevents drug contamination.