Selectively Removable Marine Engine Anode Design

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Solution Overview

Problem

Existing pencil anodes for marine engines are difficult to remove and replace, often becoming brittle and breaking, which requires costly and time-consuming replacement of both the anode and the plug, and can generate harmful debris.

Innovation Solution

A selectively removable marine engine anode design featuring a galvanic anode with a cantilevered retention member and flanged platform, allowing for easy coupling and uncoupling with a threaded configuration and polygonal nut, enabling safe and efficient attachment and detachment without damaging the engine.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a traditional pencil anode is used for corrosion protection, then the anode provides effective corrosion protection, but the anode becomes difficult to remove and replace, often requiring costly and time-consuming plug replacement

Engineering Contradiction:

Improvecorrosion protectionVSAvoidanode replacement

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The anode assembly is divided into separate components: a removable anode element and a retained plug portion. The anode element can be detached from the plug without requiring removal or replacement of the plug itself, enabling easy replacement while maintaining corrosion protection functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The anode element is extracted as a separate, removable component from the plug assembly. This allows the anode to be taken out and replaced independently without affecting the plug structure, solving the removal difficulty problem while preserving the corrosion protection function.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If a traditional pencil anode is used, then corrosion protection is provided, but the anode becomes brittle and breaks during removal, generating harmful debris that can damage the engine

Engineering Contradiction:

Improvecorrosion protectionVSAvoiddebris generation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

By separating the anode element from the plug structure, the design allows for controlled removal of the anode without subjecting it to the stress and brittleness issues that occur during forced extraction from a fixed plug, thereby preventing debris generation while maintaining corrosion protection.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The anode element is designed as a disposable component that can be easily replaced without damaging the permanent plug structure. This prevents the anode from becoming brittle and breaking during removal, eliminating harmful debris while maintaining the corrosion protection function throughout its service life.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If a traditional pencil anode is used, then corrosion protection is achieved, but complete removal of the anode requires replacement of the plug, increasing replacement costs and time

Engineering Contradiction:

Improvecorrosion protectionVSAvoidreplacement time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The assembly is segmented into a removable anode element and a permanent plug portion. This allows the anode to be completely removed and replaced without requiring plug replacement, significantly reducing replacement time and cost while maintaining continuous corrosion protection capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The anode element is extracted as a standalone replaceable component, allowing complete removal and replacement of the anode without affecting the plug structure. This eliminates the need for costly and time-consuming plug replacement while preserving the corrosion protection function.

Inventive Principle:

Principle #2Taking out (Extraction)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Facilitates quick, efficient, and safe replacement of anodes without damaging the engine, reducing maintenance costs and preventing debris hazards.

Implementation Method 1

the zinc anode 100 may consist of 99.99% or higher of zinc and may be of a rod or cylindrical shape... the anode will begin to corrode and rust, leaving the other important and expensive engine metal materials intact

Methodology Applied

Scientific EffectGalvanic corrosion: Crevice Corrosion

Data Source

PatentUS11732367B2Selectively removable marine engine anode

Publication Date: 2023.08.22 ZIMAR INT INC

AI summary

A selectively removable engine anode having a metallic anode base with a threaded configuration disposed proximal to a lower end thereon and on an outer surface, a flanged platform extending radially along a longitudinal length of the base to define an outer flange diameter, and a cantilevered retention member directly coupled to the flanged platform and having a diameter less than the outer flange diameter. The anode includes a galvanic anode with a first anode end coupled to the flanged platform, a second anode free end opposing the first anode end, and an anode length separating the first anode end and the second anode free end, wherein the galvanic anode and the flanged platform encapsulate the cantilevered retention member, the anode base is selectively removably couplable to a plug that is operably configured to be selectively coupled to a marine engine.