Round Seal Corner Geometry for Rectangular Opening Leakage

Solution Overview

Problem

Existing round seals with rectangular through openings experience increased leakage risk due to unfavorable corner forms during compression, leading to inadequate contact pressure against modules.

Innovation Solution

A round seal design with protrusions at the corners of the through opening, increasing the material volume and contact pressure against modules, thereby enhancing the sealing effect.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the body is compressed to increase contact pressure against modules, then the sealing performance improves, but the corners of the through opening form unfavorably increasing leakage risk

Engineering Contradiction:

Improvesealing performanceVSAvoidcorner form of through opening

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The patent applies local quality by increasing the material volume specifically at the corner regions of the cylindrical body while maintaining the overall compression capability. The corners are designed with a larger radius of curvature and increased axial length, creating localized material accumulation that ensures proper corner formation during compression without affecting the global sealing mechanism.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements preliminary action by pre-shaping the corners of the cylindrical body with increased volume and larger radius of curvature before the compression process. This pre-forming ensures that when compression is applied, the corners naturally form straight edges and right angles without requiring additional shaping during the compression process, thereby preventing unfavorable corner formation.

Inventive Principle:

Principle #10Preliminary action

2Stress or pressure

If the volume of material at corners is increased to improve contact pressure, then the deformation inwards increases, but the device complexity increases

Engineering Contradiction:

Improvecontact pressure against modulesVSAvoidbody geometry complexity

Core Design Contradiction:

Stress or pressureVSDevice complexity

Solution Approach 1:

The patent applies local quality by increasing the material volume specifically at the corner regions of the cylindrical body while maintaining the overall compression capability. The corners are designed with a larger radius of curvature and increased axial length, creating localized material accumulation that ensures proper corner formation during compression without affecting the global sealing mechanism.

Inventive Principle:

Principle #3Local quality

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 protrusions at the corners of the through opening improve the sealing performance by increasing the contact pressure, reducing the risk of leakage.

Implementation Method 1

By means of screws and nuts, the fittings may be moved closer to each other to compress the body

Methodology Applied

Scientific EffectCompression: Compression

Implementation Method 2

The body is normally made of a rubber material, allowing compression

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS12429149B2Round seal

Publication Date: 2025.09.30 ROXTEC AB

AI summary

A round seal (1) is provided comprising a cylindrical, compressible body (2), having a rectangular through opening (7). The round seal has fittings (3, 4) at opposite ends of the body (2) and a number of screws (5) going through holes of the body (2) and the fittings (3, 4). Nuts (6) are received on the screws (5). An axial length of the body 5 (2) is larger at the area of the corners of the through opening (7) than at the rest of the body (2).