Syringe Tip Cap Collar for One-Handed Aseptic Removal

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Solution Overview

Problem

Current syringe tip caps require two hands to remove, leading to potential contamination and complications during clinical use, as they expose the syringe tip to non-sterile environments, complicating workflow and increasing the risk of infections.

Innovation Solution

A syringe tip cap design featuring a collar with tapered projecting sidewalls and a protruding boss for a one-handed push-off mechanism, providing a physical barrier and ensuring sterility by creating a seal around the syringe tip, allowing single-handed removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If threaded connections are used in syringe tip caps, then the cap can be securely attached to the syringe, but the cap requires two hands to remove

Engineering Contradiction:

Improvesecure attachmentVSAvoidone-handed removal

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The cap is divided into a body portion and a separate collar portion. The body portion maintains the threaded connection for secure attachment, while the collar portion provides a smooth, rounded grip surface that can be easily manipulated with one hand for removal without disturbing the threaded engagement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The collar acts as an intermediary element between the user's finger and the threaded body. It provides a friction-grip surface that facilitates one-handed manipulation while the threaded body ensures secure attachment to the syringe, effectively mediating between the conflicting requirements of secure attachment and ease of removal.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If two hands are required to remove the tip cap, then secure attachment is maintained, but the syringe tip is exposed to non-sterile environment increasing contamination risk

Engineering Contradiction:

Improvesecure attachmentVSAvoidcontamination risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The cap is designed with a one-handed removal mechanism that allows the user to maintain grip on the syringe with one hand while using the same hand to remove the cap. This preliminary design consideration eliminates the need to expose the syringe tip to the environment by requiring two-handed operation, thereby preventing contamination before it can occur.

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If the finger contact surface is smooth, then the cap structure is simple, but the grip is insufficient for one-handed operation

Engineering Contradiction:

Improvecap structureVSAvoidfinger grip

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The collar portion of the cap has a locally modified surface with increased friction characteristics, such as a textured or ribbed pattern. This local quality change provides enhanced grip for one-handed operation without affecting the overall simplicity of the cap structure or the threaded engagement mechanism.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12514984B2Syringe tip cap

Publication Date: 2026.01.06 BECTON DICKINSON & CO

AI summary

Syringe tip caps are described herein. Such syringe tip caps may include a distal wall, a side wall extending proximally from the distal wall to define a chamber, the chamber configured to surround an elongate tip of a syringe. The distal wall may be attached to the sidewall via a hinge.