Faucet Handle Assembly With Bearing-Tensioned Adapter Alignment
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Solution Overview
Problem
Conventional faucet handle assemblies with non-standard materials like wood or concrete are difficult to manufacture and often have issues such as a loose or wobbly feel due to excess clearance, tall bases, and alignment challenges with irregular shapes.
Innovation Solution
A faucet handle assembly design that includes a valve stem adapter coupled to a rotatable valve stem, a lever, and a cover, which together obscure the valve stem adapter, providing a secure and aesthetically pleasing appearance by using a bearing and nut configuration to maintain constant tension and allow for non-circular handle base alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional handle assemblies use threadable coupling between handle base and mounting shank, then assembly is easy to manufacture, but the handle feels loose or wobbly due to excess clearance between splines
Solution Approach 1:
The handle assembly is divided into separate components: a mounting shank with external splines, a handle base with internal splines, and a valve stem adapter. This segmentation allows each component to be manufactured independently with precise spline dimensions, eliminating the need for excessive clearance while maintaining ease of assembly through modular construction.
Solution Approach 2:
A valve stem adapter is introduced as an intermediary component between the valve stem and the handle base. This adapter includes a bearing that interfaces with the splined mounting shank, providing precise rotational coupling and eliminating the loose feel caused by direct threaded coupling clearance.
2Ease of manufacture
If conventional handle assemblies use tall bases to house internal components, then all components can be accommodated, but the overall height increases and aesthetics are compromised
Solution Approach 1:
The valve assembly is nested within the mounting shank, which contains an internal chamber. The valve stem adapter and bearing are positioned within this chamber, allowing all internal components to be housed in a compact vertical space. This nesting arrangement eliminates the need for a tall handle base while maintaining proper component clearance and function.
3Ease of manufacture
If conventional handle assemblies use irregular-shaped handle bases, then aesthetic design is improved, but alignment with other features becomes difficult
Solution Approach 1:
The handle base is designed with an irregular, non-circular shape that provides aesthetic appeal while incorporating asymmetric alignment features. The splined interface and mounting geometry are configured to provide self-alignment during installation, eliminating the difficulty of aligning irregular shapes with other faucet features such as the spout or escutcheon.
4Ease of manufacture
If conventional handle assemblies use excess clearance between splines, then manufacturing is easier, but the handle has a loose or wobbly feel
Solution Approach 1:
A bearing is introduced to provide dynamic rotational support between the splined valve stem adapter and the mounting shank. This bearing maintains constant tension and precise alignment during rotation, eliminating the loose feel caused by clearance while allowing smooth operation. The bearing compensates for manufacturing tolerances through its inherent clearance design.
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 design enhances the stability and alignment of faucet handles with non-standard materials, reducing the loose feel and allowing for easier alignment of non-circular shapes, while maintaining a visually appealing appearance.
Implementation Method 1
A bearing is coupled to the nut. A valve stem adapter is coupled to the bearing for rotation relative to the handle base
Implementation Method 2
A bearing is coupled to the nut. A valve stem adapter is coupled to the bearing for rotation relative to the handle base
Implementation Method 3
A nut is threadably coupled to the handle base. A bearing is coupled to the nut. A valve stem adapter is coupled to the bearing for rotation relative to the handle base
Data Source
AI summary
A faucet handle assembly includes a mounting shank configured to be mounted to a mounting deck. A valve assembly is received within an internal chamber of the mounting shank, and the valve assembly includes a valve stem that is rotatable about a rotation axis to facilitate water flow through the valve assembly. The valve assembly further includes a valve stem adapter that is operably coupled to the valve stem. The faucet handle assembly further includes an upper handle. The upper handle includes a lever that is coupled to the valve stem adapter and the valve stem, and the lever is disposed on a first side of the rotation axis. The upper handle further includes a cover that is coupled to the valve stem adapter and disposed on an opposite second side of the rotation axis. The cover and the lever together obscure the valve stem adapter.