Sink Strainer Assembly with Locking Bar and Tamper-Resistant Screws
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Solution Overview
Problem
Existing strainer assemblies for sink drainage systems are difficult to attach to clamping rings, prone to accidental screw dropping, and lack vandal-proof security, with strainer legs often becoming bent, leading to leaks and installation challenges.
Innovation Solution
A strainer assembly with a cylindrical body and a locking bar system featuring a channel and post cavity design, along with tamper-resistant screws, that securely attaches to the clamping ring and prevents unauthorized removal, using a strainer body with fluid passageways and a smooth exterior for easy rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a prior art strainer with bent legs and metal bar is used to attach to the clamping ring, then the strainer can be held in position, but the attachment process is time-consuming and the strainer legs become bent leading to leaks
Solution Approach 1:
The strainer body is segmented from the attachment mechanism. The strainer body includes integrated attachment features (protrusions or lugs) that directly engage with the clamping ring, eliminating the need for separate bent legs and metal bars. This segmentation allows for a simpler, faster attachment process while maintaining secure positioning.
Solution Approach 2:
The attachment features are pre-formed as integral parts of the strainer body during manufacturing, rather than requiring field assembly of separate components. The protrusions or lugs are预先 shaped to match the clamping ring geometry, enabling direct engagement without bending or complex alignment steps.
2Reliability
If a prior art strainer assembly is used, then the strainer can be attached to the clamping ring, but the assembly lacks vandal-proof security and can be easily removed
Solution Approach 1:
The attachment features utilize asymmetric geometry where the strainer body protrusions or lugs engage with corresponding recesses in the clamping ring in a non-reversible manner. The asymmetric design prevents simple removal while maintaining secure attachment, creating a vandal-proof configuration without complex additional components.
Solution Approach 2:
The strainer body attachment features are nested within or engage with the clamping ring structure itself. The protrusions fit into recesses or slots that are part of the clamping ring, creating an integrated assembly where the strainer is securely held without requiring separate complex fastening mechanisms.
3Stability of the object's composition
If a prior art strainer with multiple components is used, then the strainer can be held in position, but the components can be easily lost during installation
Solution Approach 1:
The attachment features are merged with the strainer body as integral components rather than separate parts. The protrusions or lugs are formed as part of the strainer body itself, eliminating the need for separate metal bars, screws, or clips that could be lost during installation. This merging maintains stable positioning while reducing component count.
Solution Approach 2:
The strainer body serves multiple functions: it performs the straining function while also incorporating the attachment function through its integrated protrusions or lugs. This multi-functionality eliminates the need for separate positioning components, reducing the number of parts that could be lost during installation while maintaining stable strainer positioning.
Data Source
AI summary
A sink strainer assembly for attachment to a clamping ring of a sink waste valve assembly comprising a strainer sized to fit within and be attachable to the clamping ring by a locking bar attachable to the clamping ring and at least one or more screws affixing the strainer to the locking bar, the improvement to which comprises (a) the strainer comprising a cylindrical body having top and bottom surfaces provided with passageways extending from the top surface and extending through the bottom surface to permit fluids to pass through the strainer, a channel cut in the bottom surface and having a post cavity of greater depth than the channel, a screw passageway extending from the bottom of the post cavity through the top surface of the strainer body; (b) the locking bar comprising an elongated slat member having a width greater than the depth of the channel and a length sized to fit in the channel, the slat having a post member sized to fit into the post cavity, the post member having an axial passageway formed by a threaded interior wall and positioned on the slat member to be aligned to the screw passageway when the locking bar is positioned in the channel, the slat having its opposing end sections forming a shoulder extendable beneath the clamping ring lower rim when the strainer is positioned in the clamping ring; and (c) a screw sized and shaped to fit into the screw passageway and be operatively engaged with the threaded interior wall of the post member.