Resilient Sheath Remover Assembly for Sterile Needle Sheath Release
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Solution Overview
Problem
The process of removing protective needle sheaths from drug cartridges prior to administering injections poses challenges due to varying lengths and arrangements of components, which can lead to sterility issues and user discomfort.
Innovation Solution
A sheath remover arrangement comprising a resilient ring with legs and a cap design that allows for easy engagement and removal of the needle sheath, accommodating component tolerances and maintaining sterility through controlled axial movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective needle sheath is arranged over the injection needle, then sterility protection is improved, but removal difficulty increases due to varying component lengths and arrangements
Solution Approach 1:
The sheath remover employs a resilient ring that can dynamically adjust its position and flexibility to accommodate varying component lengths. The ring can be elastically deformed during insertion and then returns to its original shape to secure the sheath, providing adaptive removal force despite tolerances in drug cartridge and sheath dimensions.
Solution Approach 2:
The resilient ring changes its physical state from a relaxed configuration to a compressed configuration during insertion, then returns to its original state to engage the sheath. This parameter change allows the same component to adapt to different sheath sizes and positions while maintaining reliable engagement for removal.
2Adaptability or versatility
If the sheath remover is designed with a resilient ring to accommodate component tolerances, then adaptability is improved, but device complexity increases
Solution Approach 1:
The resilient ring utilizes elastic deformation to accommodate varying component dimensions. By changing its physical state through compression and recovery, the ring adapts to different sheath positions and sizes without requiring multiple components or complex adjustment mechanisms.
Solution Approach 2:
The resilient ring is a self-adjusting component that automatically adapts to the specific dimensions of the sheath and drug cartridge through its elastic properties. No external adjustment mechanisms, sensors, or control systems are needed—the ring inherently compensates for tolerances through its material properties.
3Ease of operation
If the ring is made resilient to allow inward deflection, then ease of insertion is improved, but manufacturing precision requirements increase
Solution Approach 1:
The resilient ring is designed with specific elastic properties that allow controlled deformation during insertion. The material selection and geometric design ensure the ring deflects inward smoothly during compression then returns to its original shape, providing easy insertion while maintaining consistent performance across manufacturing variations.
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
Facilitates efficient and sterile removal of protective needle sheaths from drug cartridges, ensuring smooth operation and maintaining sterility during assembly and storage.
Implementation Method 1
the ring consists of a resilient material allowing inward deflection of a proximal end of the ring
Implementation Method 2
the legs defining a space between them to receive a protective needle sheath within
Data Source
AI summary
The present disclosure relates to a sheath remover for removing a protective needle sheath from a drug cartridge. The sheath remover includes a resilient ring and one or more resilient legs attached to the ring and extending in a proximal direction. Each leg includes an inwardly directed ledge arranged at a proximal end of the leg. The ring consists of a resilient material allowing inward deflection of a proximal end of the ring. The present disclosure further relates to a method for assembling and a method for using the sheath remover.