Elastic Sliding Valvular Joint for Pre-filled Syringes
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Solution Overview
Problem
Existing valvular joints in pre-filled syringes often require structural modifications and are not adaptable to conventional syringe bodies, leading to increased manufacturing costs and complexity, and can cause unintended blockages during injection due to the elastic discoid valve's tendency to return to its closing position.
Innovation Solution
A sliding and elastic valvular joint with cooperative discoid elements, including an elastic discoid plug and a receiving discoid seat, that provides a calibrated fit and allows for temporary closure without the need for structural modifications, enabling effective use in both single-chamber and double-chamber syringes, with the discoid plug fitting inside the central passage tube of the receiving discoid seat for hermetic closure and allowing free flow during injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing valvular joints are used in pre-filled syringes, then temporary closure and free flow functions are achieved, but structural modifications to the syringe body are required
Solution Approach 1:
The valvular joint is designed as a universal component that can be adapted to conventional syringe bodies without requiring structural modifications. The discoid elements are configured to work with standard syringe geometries, making the valve system compatible across different syringe types while maintaining both temporary closure and free flow functions
2Reliability
If existing valvular joints with elastic discoid valves are used, then temporary closure is achieved, but unintended blockages occur during injection due to the valve's tendency to return to closing position
Solution Approach 1:
The valvular joint employs dynamic discoid elements that can transition between closed and open positions. The elastic discoid plug and receiving discoid seat are designed to maintain temporary closure at rest, but automatically open to allow free flow during injection through pressure-driven movement, eliminating unintended blockages
Solution Approach 2:
The valvular joint system is self-regulating during operation. The discoid elements automatically respond to pressure changes - remaining closed for temporary sealing, then opening freely when injection pressure is applied, without requiring external control mechanisms
3Adaptability or versatility
If valvular elements adaptable to conventional syringes are used, then compatibility is improved, but manufacturing cost and complexity increase due to accessories or structural modifications
Solution Approach 1:
The valvular joint is designed as a universal component that interfaces with conventional syringe bodies through standard geometries. The discoid elements are configured to work with existing syringe structures without requiring additional accessories or modifications, achieving both compatibility and manufacturing simplicity
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 valvular joint ensures effective temporary closure and free flow of solutions during injection, reducing the need for complex manufacturing and minimizing blockages, while being adaptable to various syringe types, thus simplifying the injection process and maintaining sterility.
Implementation Method 1
an elastic discoid plug (3) consisting of an elastic discoid base (5)
Implementation Method 2
moving it in a direction opposite to the direction of the injection. This moving action generates pressures and depressions in said adjacent chambers
Data Source
AI summary
An elastic and sliding valvular joint for pre-filled syringes, which comprises a single chamber with an injectable product or two chambers that contain isolated products to be mixed before the injection is described. The valvular joint acts as a temporary closure, which prevents the internal chamber from communicating with the outside, or between both internal chambers. The joint comprises two discoid cooperative elements arranged on the syringe and with its edge against the internal surface: an elastic discoid plug and a sliding receiving discoid seat. The receiving discoid seat includes a central passage tube facing the hollow cylinder, and the elastic base of the plug fits in a removable manner inside a cylindrical cavity of the opening of the central passage tube of the seat.