Sanitary Insert Pre-Filter Assembly for Sealing and Limescale Control

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Solution Overview

Problem

Existing sanitary fittings face challenges in maintaining effective sealing and filtration, leading to water leakage and functional impairment due to dirt and limescale particles, especially in fittings without reduction stages.

Innovation Solution

A sanitary insert design featuring a pre-filter with a positive-locking mechanism for the sealing element and a mesh size smaller than subsequent constriction, combined with a sealing element that can be easily aligned and fixed radially or axially, ensuring reliable filtration and sealing against the housing and functional stages.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a sealing element is used in sanitary fittings, then sealing effectiveness is improved, but the complexity of assembly and retention increases

Engineering Contradiction:

Improvesealing effectivenessVSAvoidassembly complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The sealing element is integrated directly into the pre-filter component, merging two separate functions (filtration and sealing) into a single unified component. This eliminates the need for separate sealing elements and simplifies assembly while maintaining effective sealing at the interface between the pre-filter and functional stage.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The pre-filter component performs both filtration and sealing functions autonomously. The sealing element built into the pre-filter automatically seals the interface without requiring additional sealing components or complex assembly procedures, allowing the component to serve its own sealing needs.

Inventive Principle:

Principle #25Self-service

2Reliability

If a pre-filter with small mesh size is used, then filtration effectiveness is improved, but the risk of clogging and functional impairment increases

Engineering Contradiction:

Improvefiltration effectivenessVSAvoidclogging risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The pre-filter with small mesh size performs preliminary filtration of dirt and limescale particles from the water flow before the fluid reaches the functional stage. This preliminary action prevents particles from entering and clogging the functional stage, maintaining filtration effectiveness while protecting against harmful clogging effects.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The filtration function is segmented into a separate pre-filter component with small mesh size, distinct from the functional stage. This segmentation allows the pre-filter to handle particle removal while the functional stage maintains its original functionality, preventing particle interference with the functional stage's operation.

Inventive Principle:

Principle #1Segmentation

3Reliability

If the sealing element requires precise alignment, then sealing reliability is improved, but the ease of installation deteriorates

Engineering Contradiction:

Improvesealing reliabilityVSAvoidinstallation ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The sealing element is designed with an asymmetric geometry that provides automatic orientation during insertion. The asymmetric shape ensures that the sealing element naturally aligns itself with the correct interface, eliminating the need for precise manual alignment while maintaining reliable sealing through the inherent directional characteristics of the asymmetric design.

Inventive Principle:

Principle #4Asymmetry

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 design enhances sealing and filtration efficiency, preventing water leakage and maintaining functional integrity by effectively filtering out dirt and limescale, while allowing for easy installation and improved spray patterns.

Implementation Method 1

the pre-filter is designed to provide a positive-locking retention for the sealing element and has a mesh size smaller than the clear opening of a subsequent constriction

Methodology Applied

Scientific EffectPhysical filtration: Filter (physical)

Implementation Method 2

the sealing element can be attached in an assembled position of the sanitary insert and provides a seal against the housing and functional stages

Methodology Applied

Scientific EffectSealing:

Data Source

PatentEP4696844A1Sanitary insert part, sanitary fitting and use of a sanitary insert part

Publication Date: 2026.02.18 NEOPERL GMBH

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AI summary

It is proposed that a sanitary insert (1) for use in a fitting outlet comprises a functional stage (2), a pre-screen (3) and a sealing element (4), wherein the pre-screen (3) is designed to provide a positive locking hold for the sealing element (4) and wherein the sealing element (4) can be placed on the sanitary insert (1) in an assembled assembly position.