Rotatable Fluid Transfer Device with Locking Mechanism

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Solution Overview

Problem

Existing fluid transfer devices pose risks to medical staff during handling of hazardous fluids due to complications such as locking in unfavorable positions, leading to exposure to contaminants and sharp piercing members during turning, which can result in accidents and leakage.

Innovation Solution

A fluid transfer device with a first and second connection part, where the second connection part is rotatably mounted to allow easy and safe turning, featuring a locking mechanism that prevents turning in a predetermined direction, enabling secure attachment and preventing unscrewing, while allowing full access to volume indications on connected containers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the fluid transfer device locks the fluid containers in a fixed position after assembly, then the connection stability is improved, but the ease of operation deteriorates because users cannot easily turn the containers to read volume indications

Engineering Contradiction:

Improveconnection stabilityVSAvoidease of turning containers

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The device is divided into a first connection part and a second connection part that can rotate independently relative to each other. The first connection part connects to the fluid container while the second connection part remains stationary or rotates independently, allowing the container to be turned for reading without affecting the connection stability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The second connection part is made rotatable relative to the first connection part, introducing dynamic movement capability. This allows the system to transition from a fixed position (for stability) to a rotatable position (for ease of operation), resolving the contradiction between connection stability and ease of turning containers.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If the user turns the fluid transfer device to access volume indications, then the ease of operation is improved, but the reliability deteriorates because the connection may detach or the piercing member may be exposed

Engineering Contradiction:

Improveease of accessing volume indicationsVSAvoidconnection reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

By separating the device into two independently rotatable connection parts, the system allows the second connection part to remain stationary while the first connection part (with the container) rotates. This segmentation prevents connection detachment during turning operations while still allowing access to volume indications.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The differential rotation capability allows one connection part to remain fixed (maintaining reliability) while the other rotates (providing ease of operation). This dynamic control resolves the contradiction between allowing container rotation for reading and preventing connection detachment.

Inventive Principle:

Principle #15Dynamics

3Ease of operation

If the piercing member is exposed during turning operations, then the ease of operation is improved, but the safety deteriorates because users may be exposed to sharp tips and hazardous fluids

Engineering Contradiction:

Improveease of handlingVSAvoidexposure to piercing member

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The device allows controlled rotation of the first connection part relative to the second connection part. This enables the user to turn the container for reading volume indications while the second connection part remains stationary, preventing uncontrolled movements that could expose the piercing member tip to users.

Inventive Principle:

Principle #15Dynamics

4Ease of operation

If the fluid transfer device allows free rotation of connected containers, then the ease of operation is improved, but the manufacturing precision deteriorates because the locking mechanism may not maintain consistent positioning

Engineering Contradiction:

Improveease of container rotationVSAvoidpositioning precision

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The device separates rotation capability into two independent parts: the first connection part can rotate relative to the second connection part, while the second connection part remains stationary or rotates independently. This segmentation allows container rotation for reading without compromising the precision of the connection interface.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8225826B2Fluid transfer device

Publication Date: 2012.07.24 CARMEL PHARMA

AI summary

A fluid transfer device for transferring fluid from a first fluid container to a second fluid container such as a piercing member protection device. The fluid transfer device can comprise a longitudinal axis A and a first connection part comprising a connector that connects to the first fluid container. The fluid transfer device can further comprise a second connection part rotatably mounted to the first connection part by a mounting element, and the second connection part can further comprise a threaded coupling that connects the second fluid container. The mounting element can enable turning of the second connection part with respect to the first connection part. Such a device can allow a user to safely turn e.g., a syringe after assembly to read a volume indication or similar.