Sanitary Outflow Unit With Soft Gripping Surface
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Solution Overview
Problem
Screwing on and unscrewing sanitary outflow units without tools is difficult due to high breakaway torques caused by limescale deposits or limited access, especially when using formed threads.
Innovation Solution
The sanitary outflow unit incorporates a thread made of a hard component and a gripping surface formed from a soft component, allowing manual assembly and disassembly without tools, with the soft component providing enhanced grip and sealing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a formed thread is used on the outflow unit, then the thread strength and structural integrity are improved, but the ease of manual assembly and disassembly deteriorates due to high breakaway torques
Solution Approach 1:
The outflow unit features a dual-material construction where the thread portion is made from a hard component (first material) providing high strength and resistance to limescale, while the gripping surface is made from a soft component (second material) providing enhanced friction and ease of manual handling. This local differentiation of material properties resolves the contradiction between thread strength and manual assembly ease.
Solution Approach 2:
The outflow unit combines two different materials in a single component: a hard material (such as metal or hard plastic) for the thread portion and a soft material (such as rubber or elastomer) for the gripping surface. This composite structure allows the thread to provide high breakaway torque resistance while the soft gripping surface provides high friction for easy manual assembly and disassembly without tools.
2Strength
If a hard gripping surface is used, then the structural integrity and durability are improved, but the ease of manual gripping and the coefficient of friction deteriorates
Solution Approach 1:
The gripping surface is specifically designed with a soft material property that differs from the main body material. This localized softness provides high friction coefficient for easy finger gripping while the overall component maintains structural integrity through the hard core material.
Solution Approach 2:
The material hardness parameter is changed specifically at the gripping surface to create a soft outer layer. This parameter change increases the coefficient of friction between the gripping surface and human fingers, enabling easy manual assembly and disassembly while the underlying hard material maintains structural strength.
3Ease of operation
If the gripping surface is made from a soft component, then the ease of manual assembly and the coefficient of friction are improved, but the resistance to limescale deposits and structural strength deteriorates
Solution Approach 1:
The soft material is applied only to the gripping surface where it is needed for friction enhancement, while the thread portion and internal structure remain made from limescale-resistant hard material. This spatial differentiation ensures that limescale resistance is maintained in critical areas while achieving easy manual assembly at the gripping surface.
Solution Approach 2:
The composite structure combines a limescale-resistant hard material (such as metal or chemically resistant plastic) with a soft gripping material. The hard component provides resistance to limescale deposits and structural strength, while the soft component provides high friction for easy manual handling. The two materials work together to resolve the contradiction between ease of operation and reliability.
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
Facilitates easy manual installation and removal of the outflow unit, reduces limescale deposits, and ensures a secure, tight seal, minimizing the risk of water penetration and tool damage.
Implementation Method 1
soft materials can achieve higher coefficients of friction, which makes manual assembly easier
Data Source
AI summary
A sanitary outflow unit 1 is provided having a thread 2 and a gripping surface 3, and the thread 2 is formed at least partially from a hard component 4 and the gripping surface 3 from a soft component 5.