Bathtub Surround Locking Tab Design for Leak-Free Installation
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Solution Overview
Problem
Existing bathtubs and surrounds fail to effectively prevent leaks due to the positioning of the groove relative to the flange, as seen in prior art, and lack a surround with a tongue positioned into a receiver behind the flange and not extending downwardly into the tub ledge.
Innovation Solution
A bathtub and surround system featuring a tub flange with inwardly extending pockets forming tab receiving recesses, and downwardly extending locking tabs on the surround panels that insert into these recesses behind the flange, preventing leaks and facilitating easy installation with fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the groove is positioned inside the tub flange (prior art), then the surround wall can be installed, but water leakage occurs
Solution Approach 1:
The locking tab is repositioned from extending downward into the tub ledge (vertical dimension) to extending horizontally behind the tub flange (horizontal dimension). This dimensional shift allows the tab to engage with the recess in a location that provides leak prevention without interfering with the tub ledge, thereby resolving the contradiction between reliability and ease of manufacture
Solution Approach 2:
The recess in the tub flange acts as an intermediary structure that receives the locking tab. This intermediary element enables the surround wall to be securely locked behind the flange, creating a water-tight seal while maintaining simple installation through the interlocking tab-and-recess mechanism
2Strength
If the locking tab extends downwardly into the tub ledge, then the surround can be secured, but leak prevention is compromised
Solution Approach 1:
The locking function is extracted from the downward-extending tab configuration and relocated to a horizontal tab configuration that engages behind the tub flange. This extraction allows the locking mechanism to maintain attachment strength while eliminating the interference with water flow paths that caused leakage
3Reliability
If a complex interlocking system is used to prevent leaks, then leak prevention is improved, but installation complexity increases
Solution Approach 1:
The locking tab and recess form a self-aligning, self-locking mechanism that automatically positions and secures the surround wall behind the tub flange during installation. This self-service interlocking system provides reliable leak prevention without requiring complex alignment procedures or additional fastening components
Data Source
AI summary
A bathing area surround includes a bathtub and a tub surround. The bathtub has a bathing basin that extends upwardly to a tub ledge extending outwardly from a rim, traverse to a sidewall, to an edge having tub flange is shaped to form at least one inwardly extending pocket that forms a tab receiving recess. The tub surround includes a back panel, and two side panels. The back panel and the two side panels each have downwardly extending locking tabs formed in their bottom edges, shaped to be inserted into the corresponding tab receiving recess, behind the tub flange. The back panel is then fastened to each of the two side panels via fasteners.