Nonstick Pan with Protruding Dot Pattern to Reduce Coating Peeling

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Solution Overview

Problem

Existing nonstick pans with convex portions on the bottom surface are prone to peeling due to external forces, leading to reduced nonstick performance and increased food sticking, as the convex portions occupy a significant portion of the inner surface and reduce the area of the nonstick coating layer.

Innovation Solution

A nonstick pan design featuring protruding dots with a central dot surrounded by rings of protruding dots, with a nonstick layer only on the concave portions between these dots, ensuring a balanced distribution of nonstick coating area and reducing external forces through a ring pattern that minimizes scraping impact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If convex portions are arranged in a beehive (hexagonal) pattern to prevent coating peeling, then the coating layer is protected from peeling, but the area enclosed by the hexagon must be minimized which reduces the nonstick coating layer area and causes food to stick to the convex portions

Engineering Contradiction:

Improvecoating layer stabilityVSAvoidnonstick coating layer area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent divides the protective convex structures into discrete, separated protruding dots rather than continuous hexagonal patterns. This segmentation allows the coating layer to remain intact on the concave portions while reducing the area occupied by protective structures, thereby maintaining both coating stability and sufficient nonstick coating area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different properties to different regions: the protruding dots provide protective function while the concave portions between them provide nonstick cooking surface. This local differentiation ensures that each region performs its specific function optimally without compromising the other.

Inventive Principle:

Principle #3Local quality

2Reliability

If convex portions are made dense to maximize protection, then the coating layer is better protected, but most food sticks to the convex portions during cooking, reducing nonstick effect

Engineering Contradiction:

Improvecoating layer protectionVSAvoidfood sticking to convex portions

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

By segmenting the protective structures into sparse, separated protruding dots rather than dense continuous patterns, the patent reduces the total surface area where food can stick, while maintaining adequate protection for the coating layer on the concave portions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of making the convex portions the primary nonstick surface, the patent inverts the approach by placing the nonstick coating on the concave portions between the protruding dots, making the protective structures themselves stick-resistant through proper spacing and geometry.

Inventive Principle:

Principle #13The other way round (Inversion)

3Reliability

If the area enclosed by hexagon is reduced to prevent peeling, then coating stability improves, but the convex portions occupy most of the inner surface, significantly reducing nonstick coating layer area

Engineering Contradiction:

Improvecoating layer stabilityVSAvoidinner surface area available for cooking

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent replaces continuous hexagonal enclosures with separated protruding dots, which significantly reduces the area occupied by protective structures while maintaining their protective function. This segmentation allows much more of the inner surface to be available for nonstick coating and cooking.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12502024B2Nonstick pan and manufacturing method thereof

Publication Date: 2025.12.23 ZHEJIANG SANHE KITCHENWARE CO LTD

AI summary

A nonstick pan includes a pan body, where an inner surface of the pan body is provided with protruding dots; the protruding dots include a central protruding dot and surrounding protruding dots; the central protruding dot is located at a center of the inner surface of the pan body and surrounded by protruding dot rings that are distributed from inside to outside around the central protruding dot; the protruding dot ring includes a plurality of surrounding protruding dots separated from each other; the central protruding dot and the surrounding protruding dots have a protrusion height of H; concave portions are formed between the central protruding dot and the surrounding protruding dot and between the surrounding protruding dots on the inner surface of the pan body; and a nonstick layer is provided on the concave portions on the inner surface of the pan body.