Faucet Cartridge Radially Offset Key Rotation Resistance
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Solution Overview
Problem
Faucet cartridge assemblies can be damaged and rendered inoperable due to rotation within the valve body, as existing keys and keyways with intersecting center lines fail to effectively resist such rotation.
Innovation Solution
A faucet design featuring a cartridge assembly with radially offset keys that extend from the exterior surface of the cartridge shell, where the center line of each key lies in a plane perpendicular to the central longitudinal axis of the cartridge shell, preventing rotation by interacting with corresponding keyways in the valve body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a key with center line intersecting the central longitudinal axis is used, then the structure is simple and easy to manufacture, but the key fails to effectively resist rotation of the cartridge assembly
Solution Approach 1:
The key's center line is offset radially from the central longitudinal axis of the cartridge assembly, creating an asymmetric configuration. This asymmetric key design provides effective rotation resistance by engaging with the asymmetric keyway in the valve body, preventing the cartridge assembly from rotating while maintaining structural simplicity.
2Reliability
If multiple keys are added to increase rotation resistance, then the reliability improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The solution divides the rotation resistance function into multiple keys distributed around the cartridge assembly. Each key independently contributes to preventing rotation, and the segmented configuration allows for modular manufacturing where each key can be produced and positioned separately, simplifying the overall manufacturing process while achieving high reliability.
Data Source
AI summary
The present invention provides a faucet including a cartridge assembly with a radially offset key.