Layered Gasket Structure for Pressure-Resistant Surface Conformity

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Solution Overview

Problem

Existing rubber-coated gaskets fail to create a pressure-resistant seal due to their inability to self-conform to varying distances between mating surfaces without embossments or ridges, leading to compromised sealing effectiveness.

Innovation Solution

A gasket configuration featuring a non-compressible gridded core with ribs of varied heights, combined with compressible layers that can flow into the spaces of the core to evenly distribute compression forces and conform to varying surface distances.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a non-compressible core is used to provide support and rigidity, then structural strength is improved, but the ability to self-conform to varying distances between mating surfaces deteriorates

Engineering Contradiction:

Improvestructural strengthVSAvoidability to self-conform to varying distances

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The gasket is divided into a non-compressible core and separate compressible layers. The core provides structural strength while the compressible layers independently deform to accommodate varying distances between mating surfaces, resolving the contradiction between rigidity and adaptability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the gasket have different properties: the core maintains uniform non-compressible characteristics for structural support, while the compressible layers provide localized deformation capability. This allows simultaneous achievement of strength and conformability in different parts of the same component.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If compressible material is used to allow self-conformation, then adaptability to varying surfaces is improved, but the ability to withstand high pressure deteriorates

Engineering Contradiction:

Improveself-conformation capabilityVSAvoidpressure resistance

Core Design Contradiction:

Adaptability or versatilityVSStress or pressure

Solution Approach 1:

The gasket separates pressure-bearing functions from conformability functions. The non-compressible core withstands high pressure while the compressible layers provide surface adaptation, eliminating the trade-off between pressure resistance and self-conformation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The gasket combines non-compressible and compressible materials in a layered composite structure. This composite design allows the system to simultaneously exhibit both pressure resistance (from the non-compressible core) and adaptability (from the compressible layers) without compromise.

Inventive Principle:

Principle #40Composite materials

3Reliability

If rubber coating is used to enhance sealability, then sealing effectiveness is improved, but resistance to cracking and corrosion deteriorates

Engineering Contradiction:

Improvesealing effectivenessVSAvoidcracking and corrosion resistance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention extracts the sealing function from the structural core and assigns it to dedicated compressible sealing layers. This separation allows the core to focus on structural integrity and chemical resistance while the sealing layers provide reliable sealing without being subject to cracking.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The gasket uses composite construction with a corrosion-resistant non-compressible core and compressible sealing layers made from materials resistant to cracking. This composite approach combines the advantages of different materials to achieve both sealing effectiveness and durability against environmental degradation.

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 proposed gasket configuration achieves a reliable and evenly distributed seal across mating surfaces, preventing leak paths and maintaining sealing effectiveness even under conditions of varying temperature and pressure.

Implementation Method 1

a first compressible layer configured to cover the entire first surface and to contact the first mating surface in a surface-to- surface abutting relationship, and a second compressible layer configured to cover the entire second surface and to contact the second mating surface in a surface-to-surface abutting relationship

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentEP3803163B1Gaskets with a non-compressible core and one or more compressible layers

Publication Date: 2025.04.09 LYDALL PERFORMANCE MATERIALS US INC

Figure 1A~1C
Figure 2A~2B
Figure 3~4

AI summary

According to some embodiments, a multi-layer gasket with a non-compressible core, formed of any material that is relatively rigid and incompressible and can serve as a carrier for a gasket, and compressible layers, formed of any flowable or compressible sealing material with appropriate rheology for a particular sealing application, in the form of edge or surface coatings, is presented.