Multi Chamber Syringe Bypass Asymmetry
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Solution Overview
Problem
Existing double chamber syringes with bulge-like bypasses face challenges in efficient preparation and quality control, as they are not symmetric, making them difficult to process and hindering optical inspection, which is crucial for pharmaceutical substances like lyophilized products.
Innovation Solution
A multi chamber syringe unit with a bypass arrangement featuring a constant noncircular cross section in the body, allowing liquids to pass through the separating element efficiently, improving mixing and enabling reliable optical inspection, and allowing for efficient handling and manufacturing without the need for alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a bulge-like bypass arrangement is used in the body of a double chamber syringe, then liquid can pass the separating element efficiently, but the body becomes asymmetric which hinders automated processing and optical inspection
Solution Approach 1:
The patent applies asymmetry in reverse - it uses a symmetric circular bypass arrangement instead of the conventional asymmetric bulge. The bypass is formed as a circular section in the side wall of the body, maintaining rotational symmetry of the overall syringe structure. This allows the separating element to be bypassed efficiently while preserving the symmetry needed for automated processing and optical inspection.
2Productivity
If a bulge-like bypass arrangement is used in the body of a double chamber syringe, then liquid can pass the separating element efficiently, but optical inspection of the interior is hindered
Solution Approach 1:
The patent replaces the asymmetric bulge with a symmetric circular bypass arrangement, which maintains the overall symmetry of the syringe body. This symmetry allows optical inspection systems to effectively examine the interior of the syringe without the distortions caused by asymmetric features, while still providing the necessary liquid transfer pathway.
3Ease of manufacture
If a noncircular constant cross section bypass is used, then the body remains symmetric for efficient processing, but liquid flow characteristics may be affected
Solution Approach 1:
The patent employs a circular cross-section for the bypass arrangement, which is a curved geometric form. This circular geometry provides smooth flow paths for the liquid while maintaining the rotational symmetry of the syringe body. The curved circular cross-section optimizes liquid flow characteristics without compromising the symmetry needed for automated processing.
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 multi chamber syringe unit facilitates efficient preparation, high-quality prefilled product administration, and reliable optical inspection, preventing glass breakage and ensuring uniform processing, even in automated facilities.
Implementation Method 1
The bypass arrangement is provided in the body, in particular the bypass arrangement is a section of the body in which the interior has a constant noncircular cross section orthogonal to the longitudinal axis
Data Source
AI summary
A multi chamber syringe unit includes a body, a separating element and a bypass arrangement. The body has a distal end side, a proximal end side opposite to the distal end side, an interior limited by a side wall between the distal end side and the proximal end side and a longitudinal axis centrally extending from the distal end side to the proximal end side through the body. The separating element is arranged in the interior of the body forming a distal chamber between the distal end side and the separating element and a proximal chamber between the proximal end side and the separating element. The bypass arrangement is a section of the body in which the interior has a constant noncircular cross section orthogonal to the longitudinal axis. The multi camber syringe unit allows for being efficiently prepared and for efficiently providing or administering high quality of prefilled products.