Drug Container Closure with Inverted L-Track for Needleless Syringe
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Solution Overview
Problem
Existing ready-to-use drug reconstitution assemblages for open-topped drug containers with needleless syringes lack secure and tamper-evident mechanisms for fluid transfer, risking inadvertent puncturing and inadequate sterility.
Innovation Solution
A drug container closure system featuring a closure housing with diametric inverted L-shaped tracks guiding the fluid transfer member from a non-puncturing to a puncturing position, incorporating one-way snap members for secure and audible activation, and optional sheaths or sleeves for hermetic sealing, ensuring secure and tamper-evident drug administration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fluid transfer member with puncturing cannula is used for drug reconstitution, then fluid transfer capability is improved, but risk of inadvertent puncturing and tampering increases
Solution Approach 1:
The system requires a two-step activation process where the user must first rotate the actuator to a primed position (preliminary action) before the final puncturing action can occur. This preliminary rotation engages a cam mechanism that positions the puncturing cannula, creating a deliberate sequence that prevents accidental puncturing while maintaining fluid transfer capability.
Solution Approach 2:
The system transitions from a static puncture-resistant state to a dynamic activated state through rotational motion. The cam mechanism converts rotational input into linear displacement of the puncturing cannula, allowing the system to maintain safety during storage and transport while enabling controlled fluid transfer when activated.
2Reliability
If a secure mounting system is implemented to prevent tampering, then reliability is improved, but device complexity increases
Solution Approach 1:
The closure system merges multiple functions into a single integrated assembly: the closure housing seals the drug container, the actuator serves as both the activation mechanism and the puncturing cannula driver, and the cam mechanism provides both motion conversion and tamper-evident functionality. This consolidation achieves reliable tamper protection without proportionally increasing complexity.
Solution Approach 2:
The cam mechanism acts as an intermediary between the user's rotational input and the puncturing action. It translates the rotation into the linear motion required for puncturing while providing mechanical feedback (audible click) to confirm activation, thereby mediating between the user interface and the critical fluid transfer function.
3Manufacturing precision
If inverted L-shaped tracks are used to guide fluid transfer member displacement, then control over puncturing timing is improved, but manufacturing complexity increases
Solution Approach 1:
The system uses an inverted L-shaped track that guides the actuator through a two-dimensional path (rotation and linear displacement) rather than simple linear motion. This dimensional approach allows precise control of the puncturing timing and sequence while the track itself can be molded as an integrated feature of the closure housing, balancing manufacturing precision with ease of manufacture.
Data Source
AI summary
A drug container closure for mounting on an open-topped drug container to form a ready-to-use drug reconstitution assemblage for use with a needleless syringe. The drug container closure includes a drug container stopper for sealing the drug container and a fluid transfer member with an integral needleless syringe connector and a puncturing cannula. The fluid transfer member is manually disposed along a diametric inverted L-shaped track pair from an initial non-puncturing position to a puncturing position. The inverted L-shaped track pair includes one-way snap members to prevent a user returning the fluid transfer member to an earlier position and indicating progress of the user activation.