Faucet Handle Bushing Assembly for Precise Rotational Alignment
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Solution Overview
Problem
Existing faucet handle assemblies require multiple attempts to achieve proper rotational alignment with the valve cartridge due to the use of splines or frictional means, leading to user inconvenience.
Innovation Solution
A faucet handle assembly with a handle bushing and handle featuring ribs and slots of differing profiles, allowing for precise rotational orientation through a push-fit interface, ensuring correct alignment and secure coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If splines or frictional means are used for rotational alignment, then rotational alignment is achieved, but multiple assembly attempts are required causing user inconvenience
Solution Approach 1:
The patent employs asymmetric rib profiles on the valve stem and corresponding asymmetric slot profiles in the handle. Specifically, the first rib has a different profile than the second rib, and similarly the first slot has a different profile than the second slot. This asymmetry creates a unique geometric key-lock relationship that allows the handle to be correctly positioned in only one rotational orientation, eliminating the need for multiple assembly attempts and reducing assembly time.
2Manufacturing precision
If multiple attempts are required for rotational alignment, then proper orientation can be achieved, but assembly complexity increases
Solution Approach 1:
The asymmetric rib and slot profiles provide inherent rotational alignment guidance through their unique geometric shapes. The handle can only be assembled in the correct orientation because the asymmetric features physically prevent incorrect alignment, thereby achieving precise rotational alignment without increasing assembly complexity.
Solution Approach 2:
The asymmetric geometric features automatically guide the handle into the correct rotational position during assembly without requiring external alignment tools or multiple adjustment attempts. The structure itself performs the alignment function, reducing assembly complexity while maintaining precision.
Data Source
AI summary
A faucet handle assembly configured to properly align a faucet handle relative to a valve assembly. A handle bushing includes an alignment rib received within an alignment slot of the faucet handle. The handle and the handle bushing are operably coupled together by engagement of a flexible tab of the handle bushing with an inner surface of the handle.