Sanitary Fitting Preassembled Mixing Cartridge with Flow Limiter

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Solution Overview

Problem

Existing sanitary fittings lack a preassembled unit with a flow limiter integrated into the waterway from the mixing cartridge to the water outlet, requiring separate assembly of components and limiting flexibility in design and operation.

Innovation Solution

The insert part is connected to a flow limiter at its end, which is inserted into the cartridge housing and subsequently into the water outlet of the mixing cartridge during full assembly, allowing for a preassembled unit and enabling interchangeable designs without modifying the faucet housing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a separate outlet pipe is used as a water path between the water distribution adapter and the water outlet, then the components can be assembled separately, but the mixing cartridge and water distribution adapter cannot be preassembled as a unit

Engineering Contradiction:

Improveseparate assembly capabilityVSAvoidpreassembly flexibility

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent divides the sanitary fitting into separate modules: a first preassembled unit containing the mixing cartridge with integrated flow limiter, and a second unit containing the water distribution adapter. This segmentation allows the flow limiter to be preintegrated with the mixing cartridge while maintaining the ability to assemble different combinations of units, thus resolving the contradiction between separate assembly capability and preassembly flexibility.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the flow limiter is integrated into the insert part, then preassembly is enabled, but the jet insert must be modified to include the flow limiter

Engineering Contradiction:

Improvepreassembly capabilityVSAvoidcomponent complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent merges the flow limiter with the mixing cartridge to form an integrated first preassembled unit. The flow limiter is positioned within the mixing cartridge's water outlet, allowing water to flow through the mixer and then through the flow limiter. This merging enables preassembly while managing component complexity through functional integration.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If the insert part is made exchangeable, then design flexibility is improved, but the assembly structure becomes more complex

Engineering Contradiction:

ImproveexchangeabilityVSAvoidassembly structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent designs the first preassembled unit with a standardized connection interface that can be universally coupled with different water distribution adapter units. The mixing cartridge with integrated flow limiter serves multiple functions: mixing water, limiting flow, and providing a standardized connection point. This universality enables exchangeability while managing assembly structure complexity through standardization.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP2108748B1Sanitary fittings

Publication Date: 2012.02.08 IDEAL STANDARD INT

Figure 1~3

AI summary

The sanitary fitting has valve housing (10) with water outlet (11), which has a light metal and a preassembly unit. An inserting part (24) is arranged in the water outlet of a mixing cartridge. A cartridge housing is attached with the mixing cartridge. The inserting part is formed between the mixing cartridge and the water outlet.