Viscous Material Container Radial Wall Expansion

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Solution Overview

Problem

Conventional viscous material containers often form continuous streaks or asperities on the surface of discharged viscous materials, especially when highly viscous, leading to air bubble intrusion and bacterial growth due to the angular portions between inner wall surfaces.

Innovation Solution

A viscous material container design with a housing and piston, featuring a continuous angular portion that expands radially outward when pressure is applied, reducing pressure differences and deforming to increase the interior angle, thus suppressing streaks and asperities formation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a conventional viscous material container with angular portions at boundary portions is used, then the container structure is simple and easy to manufacture, but continuous streaks or asperities are formed on the surface of discharged viscous material

Engineering Contradiction:

Improvesurface quality of discharged viscous materialVSAvoidcontainer structure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent applies local quality by providing a smooth continuous surface at the boundary portion between the first and second sections, while other portions of the container can maintain conventional angular structures. This localized smoothing approach improves discharge surface quality without requiring complete redesign of the entire container structure.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent replaces the angular boundary portion with a curved continuous surface that smoothly connects the first and second sections. This curvature eliminates the sharp angles that cause streak formation, allowing viscous material to flow smoothly without adhering to or being disrupted by angular features.

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Reliability

If angular portions are present at boundary portions in the container, then the container is easier to manufacture, but air bubbles intrude into the viscous material causing color changes and bacterial growth

Engineering Contradiction:

Improvepurity of discharged viscous materialVSAvoidcontainer manufacturing difficulty

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies local quality by providing a smooth continuous surface at the boundary portion where viscous material flows, while other portions of the container can maintain conventional angular structures. This localized smoothing approach prevents air bubble entrapment at the critical flow path without requiring complete redesign of the entire container structure.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent replaces the angular boundary portion with a curved continuous surface that smoothly connects the first and second sections. This curvature eliminates dead zones and sharp angles where air bubbles can become trapped, ensuring pure discharge of viscous material without air bubble contamination.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Manufacturing precision

If the container has a rigid structure with fixed angular portions, then the container maintains structural strength, but continuous streaks or asperities are formed on the discharged viscous material surface

Engineering Contradiction:

Improvesurface smoothness of discharged viscous materialVSAvoidcontainer structural strength

Core Design Contradiction:

Manufacturing precisionVSStrength

Solution Approach 1:

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The patent provides that the boundary portion may be formed with a flexible material or structure that can expand or deform under pressure from the viscous material. This flexibility allows the boundary portion to adapt to the flowing material, maintaining surface smoothness while the overall container structure retains its strength through the rigid body portions.

Inventive Principle:

Principle #30Flexible shells and thin films

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

Effectively prevents the formation of streaks and asperities on the surface of discharged viscous materials, ensuring smooth dispensing and reducing air bubble intrusion, suitable for dental applications with high viscosity materials.

Implementation Method 1

a wall portion positioned radially outwardly of the continuous angular portion with respect to the second imaginary center line, and extending along the continuous angular portion, and the wall portion is configured to expand radially outward when the viscous material is pushed out

Methodology Applied

Scientific EffectElastic expansion: Elasticity

Data Source

PatentEP2853225B1Viscous material container with expandable bend

Publication Date: 2017.10.04 SHOFU INC

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AI summary

A viscous material container that is not likely to form continuous streaks or asperities on the surface of a viscous material discharged from the viscous material container even if the viscous material is highly viscous. A third section of a housing includes a wall having a wall portion that is positioned radially outwardly of a continuous angular portion with respect to a second imaginary center line, and extends along the continuous angular portion. The wall portion is configured to expand radially outward when a dental viscous material is pushed out from a discharge port.