Variable-Stiffness Gasket for Leak-Safe Oral Insert Interfaces

Solution Overview

Problem

Existing oral health devices face challenges in preventing leaks at the oral insert-handle interface due to gaskets with either insufficient hardness (too soft) or excessive stiffness (too hard), which hinder effective attachment and fluid containment.

Innovation Solution

A gasket with variable stiffness is employed, featuring greater stiffness proximal to the manifold switching mechanism and lesser stiffness distal to it, reducing the likelihood of leaks by minimizing fluid escape during device activation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a gasket with high hardness is used at the oral insert-handle interface, then leak prevention is improved, but attachment ease deteriorates

Engineering Contradiction:

Improveleak preventionVSAvoidattachment ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The gasket incorporates a compliant layer with different material properties than the main body, creating local variation in hardness. The proximal portion (near the interface) has higher compliance for easier attachment, while the distal portion maintains sufficient hardness for effective sealing against leaks.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The gasket is constructed as a composite structure with at least two layers: a main body layer and a compliant layer with different durometer hardness. This composite design allows the gasket to exhibit both soft characteristics for easy attachment and hard characteristics for reliable leak prevention at the sealing interface.

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If a gasket with low hardness is used at the oral insert-handle interface, then attachment ease is improved, but leak prevention deteriorates

Engineering Contradiction:

Improveattachment easeVSAvoidleak prevention

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The gasket incorporates a compliant layer with different material properties than the main body, creating local variation in hardness. The proximal portion (near the interface) has higher compliance for easier attachment, while the distal portion maintains sufficient hardness for effective sealing against leaks.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The gasket is constructed as a composite structure with at least two layers: a main body layer and a compliant layer with different durometer hardness. This composite design allows the gasket to exhibit both soft characteristics for easy attachment and hard characteristics for reliable leak prevention at the sealing interface.

Inventive Principle:

Principle #40Composite materials

3Stability of the object's composition

If a uniformly stiff gasket is used, then structural stability is improved, but sealing effectiveness at the interface deteriorates

Engineering Contradiction:

Improvestructural stabilityVSAvoidsealing effectiveness

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The gasket incorporates a compliant layer with different material properties than the main body, creating local variation in hardness. The proximal portion (near the interface) has higher compliance for easier attachment, while the distal portion maintains sufficient hardness for effective sealing against leaks.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The gasket is constructed as a composite structure with at least two layers: a main body layer and a compliant layer with different durometer hardness. This composite design allows the gasket to exhibit both soft characteristics for easy attachment and hard characteristics for reliable leak prevention at the sealing interface.

Inventive Principle:

Principle #40Composite materials

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

The variable stiffness gasket effectively seals the oral insert-handle interface, ensuring reliable fluid delivery and minimizing leaks while allowing easy attachment and operation.

Implementation Method 1

A gasket with variable stiffness is employed, featuring greater stiffness proximal to the manifold switching mechanism and lesser stiffness distal to it

Methodology Applied

Scientific EffectVariable stiffness:

Data Source

PatentUS20260060790A1Gasket for an oral insert-handle interface

Publication Date: 2026.03.05 FRESH HEALTH INC

AI summary

An oral health device includes an oral insert and a fluid delivery system. The oral insert includes a plurality of manifolds for conveying fluids to nozzles in the oral insert. The fluid delivery system includes an interface that mates with the oral insert. The interface includes a gasket having variable stiffness. The gasket has a greater stiffness on a portion proximal to the fluid delivery system than a portion distal to the fluid delivery system.