Faucet Handle Coupling With Hidden Fastener Retention
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Solution Overview
Problem
Existing faucet handle connection systems require fasteners that protrude through the handle, disrupting the aesthetic quality and creating maintenance challenges such as grime accumulation and water leakage.
Innovation Solution
A faucet handle connection system that uses annular projections and channels to toollessly couple the handle to a yoke, eliminating the need for fasteners and maintaining an uninterrupted exterior surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fasteners are used to secure the handle to the valve stem, then the handle is firmly retained, but the aesthetic quality is decreased and maintenance becomes difficult
Solution Approach 1:
The patent removes the fastener from the exterior of the handle, extracting the harmful element that disrupts aesthetics. The fastener is relocated to the interior, where it remains functional for securing the handle while being hidden from view, thus resolving the contradiction between reliable retention and aesthetic quality.
Solution Approach 2:
The patent implements a nested structure where the fastener is positioned inside the handle assembly, within the opening. The handle wall contains the fastener, creating a nested arrangement where the retaining mechanism is embedded within the handle structure itself, eliminating the need for exterior fasteners while maintaining secure retention.
2Reliability
If fasteners are used to secure the handle, then the handle is firmly retained, but service and replacement of valves become difficult
Solution Approach 1:
The patent segments the handle assembly into distinct functional components: the handle body, the opening with interior fastener, and the valve stem. This segmentation allows the valve stem to be independently accessed and serviced by removing only the handle, which is secured by the interior fastener rather than exterior fasteners that would complicate disassembly.
Solution Approach 2:
By extracting the fastener from the exterior to the interior of the handle, the patent enables easier serviceability. The interior fastener can be accessed and removed without disturbing the exterior finish or requiring complex disassembly procedures, allowing straightforward valve replacement while maintaining reliable handle retention during normal operation.
3Reliability
If fasteners protrude through the handle, then secure connection is achieved, but grime accumulation and water leakage occur
Solution Approach 1:
The patent extracts the fastener from the exterior surface of the handle and repositions it inside the handle assembly. This eliminates the protrusion that creates gaps and crevices where grime accumulates and water can leak, while the interior positioning maintains the secure connection function without exposing the fastener to external contaminants.
Solution Approach 2:
The patent utilizes the handle wall as a enclosing structure that seals around the fastener. The handle body acts as a protective shell that contains the fastener and prevents water and grime from reaching the connection interface, eliminating leakage paths while maintaining connection strength through the interior fastening mechanism.
Data Source
AI summary
A process includes inserting a valve cartridge in a fitting, the valve cartridge comprising a valve stem. The process also includes after inserting the valve cartridge in the fitting, coupling a collar to the fitting such that the collar extends around the valve stem. The process also includes aligning the valve stem with an engagement crown of a handle such that an opening of the handle is located over the collar. The process also includes press fitting the valve stem into the engagement crown while pressing the handle towards the collar and such that the valve stem is rotatably coupled to the handle through the engagement crown.