Threaded Syringe Dispenser for Precision Dosing

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Solution Overview

Problem

Current syringe dispensing technologies lack precision in dosing, leading to inaccurate and variable delivery of medications and materials, which can result in adverse effects and inefficiencies in medical and diagnostic applications, and also cause ergonomic issues like hand pain and injury due to repetitive pressing actions.

Innovation Solution

A syringe dispenser with a plunger having outer threading and a nut with inner threading, allowing for precise, controlled dispensing of liquid or semisolid fluids through a rotational screwable action, reducing user effort and minimizing ergonomic strain by using a snap-on nut and markings for volume measurement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a traditional syringe with plunger pressing action is used, then the device is simple and easy to manufacture, but the dosing precision and accuracy deteriorate

Engineering Contradiction:

Improvedosing precisionVSAvoiddevice complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces the traditional direct pressing mechanical action with a rotational screwing action. The plunger is transformed into a threaded rod that rotates within a nut, converting linear pressing motion into rotational motion. This substitution enables precise dosing through controlled rotation while maintaining mechanical simplicity in the overall device structure.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the operational parameter from linear displacement to rotational angle. By introducing threading with a specific pitch, the system converts the plunger's linear movement into rotational movement, where the dosing volume is determined by the rotation angle rather than direct linear displacement. This parameter change enables more precise control and measurement of the dispensed volume.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If repeated pressing of the plunger is performed, then the material is dispensed, but ergonomic issues and hand pain occur

Engineering Contradiction:

Improvedispensing efficiencyVSAvoidergonomic injury

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the repeated pressing action with a continuous rotational screwing action. Instead of repeatedly pushing the plunger forward and releasing it, the user continuously rotates the threaded plunger, which smoothly and continuously dispenses the material. This substitution eliminates the repetitive strain on the thumb and hand while maintaining efficient dispensing.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If a threaded plunger with nut is used, then dosing accuracy is improved, but the ease of operation may deteriorate

Engineering Contradiction:

Improvedosing accuracyVSAvoidease of operation

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The threaded plunger and nut combination creates a self-contained dosing mechanism where the rotation automatically translates to precise linear displacement of the plunger. The system serves itself by converting the user's rotational input directly into controlled linear output without requiring additional measurement or adjustment steps, maintaining ease of operation while achieving high dosing accuracy.

Inventive Principle:

Principle #25Self-service

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

Enables accurate, measurable, and controlled dispensing of materials, reducing the risk of overdose or underdose and minimizing ergonomic injuries by providing a stable and precise dosing mechanism that is easy to use and reduces finger motion and force required.

Implementation Method 1

a plunger (2) having an outer threading (7), and a nut (4) having an inner threading (11). The nut (4) is at least partly enclosing the plunger (2) and the barrel (3), such that the inner threading (11) of said nut engage with the outer threading (7) of the plunger (2)

Methodology Applied

Scientific EffectMechanical threading: Screw

Data Source

PatentUS9044549B2Syringe dispenser, stand and application plate for said syringe dispenser and method for its use

Publication Date: 2015.06.02 NOVISCENS

AI summary

A syringe dispenser may include a plunger having an outer threading, a barrel adapted to contain liquid or semisolid fluid or any other material to be dispensed and to receive the plunger, the plunger being movably attached to the barrel, and a nut having an inner threading. The nut may at least partly enclose the plunger and the barrel, such that the inner threading of the nut engages with the outer threading of the plunger. A stand, an application plate, and a method of dispensing a controlled and measurable amount of liquid or semisolid fluid from a syringe dispenser are also disclosed.