Monolithic Drain Body With Seam-Free Hygienic Internal Volume

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Solution Overview

Problem

Conventional drains manufactured from multiple pieces and welded seams create hygienic issues due to contamination risks from dirt, bacteria, and other substances that can lodge in the crevices and pockets formed by the seams.

Innovation Solution

A drain formed from a single piece of monolithic material, where the base wall, side wall, and ledge are formed without seams, using a die to shape the material into a monolithic body with a larger internal volume and a smaller access aperture, allowing for the removal of the die without extending outside the assembled shape, thus eliminating contamination pockets.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If multiple separate pieces are welded together to form internal volumes, then the manufacturing process can accommodate complex shapes and sizes, but welded seams create pockets and crevices that become contaminated by dirt and bacteria

Engineering Contradiction:
Improveability to form internal volumesVSAvoidcontamination from welded seams
Core Design Contradiction:
Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent merges multiple separate pieces into a single monolithic structure formed from one continuous piece of material. This eliminates the welded seams that create contamination pockets, while still enabling the formation of complex internal volumes through the single-piece construction process.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The die is divided into multiple removable segments that can be detached from the formed monolithic structure. This segmentation of the manufacturing tool (not the final product) allows complex internal geometries to be formed and then released, resolving the contradiction between creating complex shapes and avoiding seam contamination.

Inventive Principle:
Principle #1Segmentation

2Object-affected harmful factors

If a die is used to form a monolithic body with a larger internal volume accessed via a smaller aperture, then contamination pockets are eliminated, but the die must be completely removable through the smaller aperture without extending outside the assembled shape

Engineering Contradiction:
Improvecontamination accumulationVSAvoiddie removal constraint
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The die is segmented into multiple removable portions that can be detached in sequence through the smaller aperture. This segmentation allows the die to form complex internal geometries while enabling complete removal through the constrained opening, as each segment can be extracted independently without requiring the entire die to pass through the smaller aperture simultaneously.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS20240191491A1Monolithic drain, tooling, and method for making same
Publication Date: 2024.06.13 ZURN WATER LLC
  • US20240191491A1 patent drawing
  • US20240191491A1 patent drawing
  • US20240191491A1 patent drawing

AI summary

A monolithic drain body including a base wall defining an outlet and a periphery, a side wall extending from the periphery of the base wall to produce an open end opposite the base wall, and a ledge formed into the side wall and extending inwardly therefrom to at least partially enclose a first volume between the ledge, the side wall, and the base wall.