Apron-Front Sink Assembly for Easier Cabinet Retrofitting

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Solution Overview

Problem

Apron-front sinks face challenges in fitting into standard cabinetry due to width and height mismatches, requiring extensive modifications or undersized installations, and the installation process is cumbersome with repeated lifting of heavy sinks for precise fitting.

Innovation Solution

Design of a sink with an apron extending laterally beyond the rim, allowing it to overlap cabinet edges and fit flush, reducing the need for precise cuts and enabling installation without extensive cabinet modifications, along with a method for installing the sink onto a support structure using top supports and shims for alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If traditional apron-front sinks are installed in standard cabinetry, then the sink provides adequate depth and capacity, but the sink requires extensive cabinet modifications and precise repeated cuts to fit without visible gaps

Engineering Contradiction:
Improvefit precisionVSAvoidinstallation ease
Core Design Contradiction:
Manufacturing precisionVSEase of manufacture

Solution Approach 1:

Instead of making the sink fit precisely within the cabinet opening (traditional approach), the patent inverts the approach by making the cabinet opening fit within the sink's apron. The apron extends beyond the cabinet edges, and the cabinet opening is sized to be smaller than the apron width, allowing the sink to overlap the cabinet and eliminating the need for precise fitting of the sink to the cabinet opening.

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The patent addresses the fitting problem by transitioning from a two-dimensional fit (sink width matching cabinet opening width) to a three-dimensional solution where the apron extends in the lateral dimension beyond the cabinet edges. This dimensional extension allows the sink to overlap the cabinet structure, providing tolerance for installation variations without requiring precise cuts.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If apron-front sinks are retrofitted into existing non-apron-front cabinetry, then the sink can be installed in standard cabinets, but extensive cabinet modifications or undersized sink installation is required

Engineering Contradiction:
Improvecabinet compatibilityVSAvoidretrofit ease
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent enables retrofitting by inverting the traditional fit approach: instead of modifying the cabinet to match the sink, the sink's apron is designed to extend beyond the cabinet edges, allowing the existing cabinet structure to be accommodated within the apron's footprint. This eliminates the need for extensive cabinet modifications while maintaining full sink size.

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The extended apron design provides universal compatibility with both custom-apron-front cabinetry and standard non-apron-front cabinetry. The same sink design can be installed in different cabinet types without requiring modifications to the sink itself, achieving multi-functionality across different installation scenarios.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Manufacturing precision

If precise fitting methods are used to install apron-front sinks, then visible gaps between the apron and cabinet are eliminated, but the installation process requires repeated lifting of heavy sinks and takes significant time

Engineering Contradiction:
Improvegap eliminationVSAvoidinstallation time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-designing the apron extension and cabinet opening dimensions during the manufacturing stage. The apron is manufactured to extend a specific distance beyond the rim, and the cabinet opening is pre-sized to be smaller than the apron width. This preliminary design eliminates the need for repeated measuring, marking, and cutting during installation, significantly reducing installation time while maintaining gap elimination.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

By inverting the fit approach (cabinet opening within apron rather than apron within cabinet opening), the patent eliminates the iterative fitting process. The extended apron provides built-in tolerance that accommodates installation variations without requiring repeated lifting and adjustment, thus reducing both installation time and physical effort.

Inventive Principle:
Principle #13The other way round (Inversion)

4Ease of operation

If the apron extends laterally beyond the rim, then the sink can overlap cabinet edges and fit flush without precise cuts, but the sink structure becomes more complex

Engineering Contradiction:
Improveinstallation easeVSAvoidsink structure complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent merges the apron and basin into a single integrated structure formed from one piece of material. This combining of components simplifies the manufacturing process (forming a single piece rather than assembling multiple parts) while achieving the desired extended apron geometry that facilitates easy installation and cabinet overlap.

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentUS10092097B2Apron-front sink assembly
Publication Date: 2018.10.09 KOHLER CO(US)
  • US10092097B2 patent drawing
  • US10092097B2 patent drawing
  • US10092097B2 patent drawing

AI summary

An assembly includes a cabinet including a front face and an opening in the front face that is defined at least in part by two vertical cut lines and a horizontal cut line that extends between the two vertical cut lines. The assembly also includes a sink coupled to the cabinet, the sink including a basin and an apron coupled to the basin and located forward of the basin to provide a front surface of the sink. The apron has a lateral width that is wider than the opening such that ends of the apron overlap the two vertical cut lines to conceal the vertical cut lines on the front face of the cabinet.