Faucet Friction Ring for Stable Valve Stem Positioning
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Solution Overview
Problem
Existing faucet assemblies face issues with self-movement of the valve stem due to insufficient internal friction, leading to unintended changes in water flow or temperature, which limits faucet handle design and requires careful control of handle size and shape.
Innovation Solution
A friction ring is integrated into the faucet assembly, featuring a body with a contact member that slidably engages with the valve stem, applying a friction force in a perpendicular orientation to prevent self-movement and maintain the valve stem's position over its full range of motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If internal friction between valve stem and valve assembly parts is increased to prevent self-movement, then handle stability improves, but handle size and shape design freedom is reduced
Solution Approach 1:
The friction generation is segmented from the handle-valve stem system into a separate friction ring component. The friction ring is a distinct element that can be independently designed, manufactured, and adjusted, allowing the handle design to focus on ergonomics and aesthetics while the friction ring handles the friction requirements.
Solution Approach 2:
The friction ring acts as an intermediary component between the valve stem and the handle assembly. It mediates the friction interaction by providing a dedicated friction surface that contacts the valve stem, thereby preventing self-movement without imposing constraints on handle design.
2Reliability
If internal friction within valve assembly is increased to prevent handle self-movement, then valve stem position stability improves, but manufacturing complexity increases due to careful control requirements
Solution Approach 1:
The friction function is extracted from the integrated valve assembly and embodied in a separate friction ring component. This extraction simplifies manufacturing by allowing the friction ring to be produced as a standalone part with optimized friction characteristics, rather than requiring precise control of friction interfaces throughout the entire valve assembly.
Solution Approach 2:
The friction characteristics are optimized by changing parameters of the friction ring, such as material composition, surface texture, contact pressure, and contact area. These parameter adjustments provide a straightforward manufacturing approach to achieving the required friction level without complex assembly requirements.
3Reliability
If friction force is increased to maintain valve stem position against gravity, then handle self-movement prevention improves, but force required to operate handle increases
Solution Approach 1:
The friction force is localized to specific contact points between the friction ring and the valve stem, rather than being distributed throughout the entire handle assembly. This localized friction application provides the necessary resistance to self-movement while minimizing the overall force required to operate the handle, as the friction acts only where needed to prevent gravity-induced drift.
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 friction ring enhances the frictional force between the valve stem and the friction ring, preventing self-movement and allowing for more design flexibility in faucet handles by ensuring the valve stem remains stable under its own weight, enabling precise control over water flow and temperature.
Implementation Method 1
The contact member is configured to press against the valve stem to increase a friction force between the contact member and the valve stem over a full range of movement of the valve stem
Data Source
AI summary
Disclosed is a friction ring including a body and a contact member. The body is configured to couple the friction ring to at least one of a faucet assembly or a faucet valve assembly. The contact member is disposed on the body. The contact member is configured to slidably engage with a valve stem of the faucet valve assembly. The contact member is further configured to press against the valve stem to increase a frictional force between the contact member and the valve stem over a full range of movement of the valve stem.