Three-Part Syringe Dose Divider for One-Handed Equal Dosing

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Solution Overview

Problem

Existing dose dividers for syringes require two hands for operation, are orientation-dependent, provide unreliable dosing, and often require redesigning the plunger, leading to slow and unequal medication delivery.

Innovation Solution

A dose divider with a three-part design that includes a top section for attachment to the plunger, a middle section with projections for feedback, and a bottom section for attachment to the barrel, providing one-handed operation, tactile feedback, and equal dosing without requiring separate attachment or removal between doses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a dose divider requires two hands for operation, then the user can maintain better control over the syringe and dose divider, but the operation becomes more complex and time-consuming

Engineering Contradiction:

Improveone-handed operationVSAvoidoperation complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The dose divider combines the plunger and barrel attachment functions into a single integrated component. The top section attaches to the plunger while the bottom section attaches to the barrel, merging what would traditionally require separate attachments into one unified structure that enables one-handed operation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The dose divider is designed to work with conventional syringes without requiring custom plunger designs. The universal attachment mechanism allows the same dose divider to be used with standard syringe components, reducing complexity while maintaining functionality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If the dose divider requires rotation or removal after a first dose, then the user can reset the dose divider, but the medication delivery becomes slower and less reliable

Engineering Contradiction:

Improvedosing reliabilityVSAvoidmedication delivery speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The dose divider allows continuous medication administration without requiring rotation or removal between doses. The plunger can be pushed forward to administer the second dose while the dose divider remains attached to the syringe, maintaining continuous useful action and improving both speed and reliability.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The projections on the dose divider provide tactile feedback to the user during plunger movement, indicating when a dose has been administered. This feedback mechanism ensures reliable dosing while allowing continuous operation without requiring user attention diversion for resetting.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If the dose divider requires specific angular or spatial orientation for correct use, then the dosing accuracy can be improved, but the user alignment process becomes slower

Engineering Contradiction:

Improvedosing accuracyVSAvoidalignment time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The dose divider is pre-oriented during manufacturing with the plunger attachment section and barrel attachment section positioned at specific angles. This preliminary orientation ensures that when the dose divider is attached to the syringe, the correct alignment is automatically achieved, eliminating the need for user alignment time while maintaining dosing accuracy.

Inventive Principle:

Principle #10Preliminary action

4Ease of operation

If internal projections are placed on the plunger to provide resistance, then the dosing can be controlled, but the projections create unequal and unreliable medication dosage

Engineering Contradiction:

Improvetactile feedbackVSAvoiddosage equality

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The dose divider is segmented into distinct sections: a top section that attaches to the plunger, a middle section with projections that provide tactile feedback, and a bottom section that attaches to the barrel. This segmentation separates the feedback function from the dosing mechanism, allowing the projections to provide tactile indication without interfering with the plunger's movement and dosing accuracy.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250352739A1Dose divider for a medical device

Publication Date: 2025.11.20 TELEFLEX MEDICAL INC

AI summary

The invention relates to a dose divider, method, and system of the same, including a top section, a middle section, and a bottom section. The top section removably attaches to a plunger of the syringe and includes a stabilizer orient the dose divider. Further, the top section includes a first stop to prevent the top section from moving past a flange of the syringe. The middle section includes at least one projection providing feedback to a user when a unit dose of medication has been drawn up or has been administered and dosing portions separated by the projection(s). The dosing portions are configured to correspond to one unit dose of medication measured by the syringe; and. The bottom section removably attaches to a barrel of the syringe and includes a second stop to prevent the bottom section from moving past the flange of the syringe during drawing up of medication.