Faucet Handle Coupling Without Fasteners or Friction Washers
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Solution Overview
Problem
Faucet handles are difficult to service or replace due to fastener-based attachment methods, which disrupt the aesthetic quality and require additional components like friction washers to maintain proper alignment, leading to potential wobble issues.
Innovation Solution
A handle connection system that uses annular projections and channels to toollessly couple and uncouple the handle from the yoke, eliminating the need for fasteners and maintaining consistent rotation without the use of friction washers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fasteners are used to attach the handle to the valve stem, then the handle is securely retained, but the aesthetic quality is decreased and serviceability is reduced
Solution Approach 1:
The patent removes the fastener and aperture from the handle design, extracting the problematic elements that compromised aesthetics and serviceability. The handle connection system uses an internal mechanism with a connection ring and valve stem interaction that secures the handle without requiring external fasteners visible on the handle surface, thereby maintaining aesthetic quality while enabling easy serviceability through simple rotational movement.
2Reliability
If fasteners and apertures are used to retain the handle, then the handle is securely attached, but the uninterrupted surface is interrupted
Solution Approach 1:
The patent eliminates the aperture and fastener from the handle's external surface by using an internal connection mechanism. The handle maintains its uninterrupted aesthetic surface while the connection ring and valve stem interaction provide secure attachment internally, removing the visual disruption caused by traditional fastener systems.
3Stability of the object's composition
If friction washers are used to maintain alignment, then proper positioning is achieved, but device complexity increases and wobble issues may occur
Solution Approach 1:
The patent removes the friction washer from the connection system, eliminating the additional component that increased complexity. The handle alignment and stability are achieved through the geometric interaction between the connection ring and valve stem features, which provide inherent alignment without requiring separate friction washers or additional alignment components.
Solution Approach 2:
The patent combines the alignment and retention functions into the integrated connection ring and valve stem interaction. Rather than using separate components like friction washers for alignment and fasteners for retention, the design merges these functions into a unified system where the connection ring's interaction with the valve stem simultaneously provides both alignment and secure attachment.
Data Source
AI summary
A process includes placing a nut around a valve cartridge, the valve cartridge comprising a valve stem. The process also includes aligning the valve stem with an engagement crown of a handle. The process also includes pressing the handle towards the nut after placing the nut around the valve cartridge and aligning the valve stem with the engagement crown, such that the valve stem is rotatably coupled to the handle through the engagement crown.