Radial Expansion Mounting Aid for Secure Pool Fitting Attachment

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Solution Overview

Problem

Existing solutions for attaching fittings to swimming pool inlets and outlets are limited by the need for precise matching of diameter and geometry, often requiring screws or threads that can be aesthetically unpleasing, prone to damage, or difficult to install and remove, and may not withstand the conditions of a wet environment.

Innovation Solution

An assembly aid featuring a fastening element between two compression elements, adjustable via a connecting element like a screw, which compresses to expand radially and securely anchor to the inner walls of openings regardless of diameter or geometry, using materials with high friction and deformability like rubber for secure, flexible, and detachable attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If screws are used to attach fittings to openings, then the attachment is secure, but the screws are either visible (detracting from aesthetics) or concealed (making access for tightening and loosening cumbersome)

Engineering Contradiction:
Improveattachment securityVSAvoidaccess for tightening and loosening
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent introduces an intermediate attachment mechanism that eliminates the need for traditional screws. The fitting itself incorporates attachment elements that engage with the opening structure, providing secure fastening while maintaining aesthetic appearance and ease of operation without requiring concealed or visible screws

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent removes the separate screw component from the attachment system, integrating the fastening function directly into the fitting structure. This extraction of the screw element eliminates the aesthetic and operational problems associated with visible or concealed screws while maintaining secure attachment

Inventive Principle:
Principle #2Taking out (Extraction)

2Ease of manufacture

If internal threads are used in the pipe opening, then fittings can be screwed in without additional screws, but the threads can be damaged during construction or aging, and may seize up over time

Engineering Contradiction:
Improveinstallation simplicityVSAvoidthread durability
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The patent employs a disposable or replaceable attachment mechanism in the fitting that does not rely on permanent threads in the opening. This allows the fitting to be attached securely without compromising the opening structure, and enables easy replacement if the fitting becomes damaged or worn

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent introduces an intermediate attachment system that bridges the fitting and the opening without requiring direct threading into the opening. This intermediate mechanism protects the opening from thread damage while providing secure attachment and easy replacement capability

Inventive Principle:
Principle #24Intermediary (Mediator)

3Loss of time

If the opening is fitted early in construction, then it is ready for fittings, but the opening can be damaged by foot traffic, heavy materials, or mortar accumulation

Engineering Contradiction:
Improvereadiness for fittingsVSAvoidopening integrity
Core Design Contradiction:
Loss of timeVSReliability

Solution Approach 1:

The patent uses a disposable or replaceable fitting design that does not require the opening to be permanently intact. The fitting can be installed after construction is complete, and if the opening becomes damaged, the fitting can be removed and replaced without requiring repair of the opening structure

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent employs an attachment mechanism that compensates for potential opening damage. The design allows for misalignment or irregularities in the opening while maintaining secure attachment, effectively cushioning against the effects of construction damage

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

4Reliability

If retaining clips are used to secure fittings, then the fitting can be firmly installed without screws or threads, but the clips may be completely twisted and deformed during removal

Engineering Contradiction:
Improvefirm installationVSAvoidremoval difficulty
Core Design Contradiction:
ReliabilityVSEase of repair

Solution Approach 1:

The patent removes the retaining clip component from the attachment system, integrating the release mechanism directly into the fitting structure. This allows the fitting to be securely installed yet easily removed by simply detaching the fitting itself, eliminating the problem of deformed clips during removal

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent implements a self-releasing attachment mechanism where the fitting itself serves as both the attachment and release element. The fitting can be securely fastened and equally easily removed by simple manipulation of the fitting, without requiring separate clips that may become deformed

Inventive Principle:
Principle #25Self-service

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

Enables secure, flexible, and easy attachment of fittings to various openings without damaging the pool structure, maintaining aesthetics and functionality, even under high water pressure, with minimal effort and without the need for precise matching of parts.

Implementation Method 1

compresses to expand radially and securely anchor to the inner walls of openings

Methodology Applied
Scientific EffectRadial expansion upon compression: Poisson's Effect

Implementation Method 2

using materials with high friction and deformability like rubber for secure, flexible, and detachable attachment

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentEP3510215B1Mounting aid for fastening fittings to the mouth of an opening
Publication Date: 2022.02.16 RUEGG UDO AG
  • EP3510215B1 patent drawingFigure 1a~1b
  • EP3510215B1 patent drawingFigure 1c
  • EP3510215B1 patent drawingFigure 2a~2b

AI summary

The invention relates to a mounting aid for fastening fittings to the mouth of an opening (3), comprising a fastening element (1) of elastic material arranged between two compression elements (2a-b), wherein, when the compression elements (2a-b) move toward each other, the fastening element (1) is compressed in one direction and extended in the direction perpendicular thereto.