Zinc-Aluminum Fishing Lure for Fast Sinking Without Lead Toxicity

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Solution Overview

Problem

Traditional lead-based fishing lures and sinkers contribute to water pollution and toxicity, posing health risks to aquatic life and humans, and existing alternatives lack the density and sinking speed of lead.

Innovation Solution

A fishing lure made from a zinc-aluminum alloy (ZA-12) with a density of 6 g/cm3, incorporating a balanced design and hydrodynamic shape to mimic wounded baitfish, and coated with non-lead protective layers to enhance attraction and sinking speed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If lead-based materials are used for fishing lures, then density and sinking speed are improved, but environmental toxicity worsens

Engineering Contradiction:

Improvesinking speedVSAvoidenvironmental toxicity

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent changes the material composition parameters by using zinc-aluminum alloy (85-90% zinc, 8-12% aluminum) with controlled lead content (≤3%) to achieve density of 5-7 g/cm3, maintaining sinking performance while reducing toxicity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite material approach by combining zinc and aluminum in specific proportions to create an alloy that provides both the required density for sinking and reduced environmental harm compared to pure lead

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If lead content is reduced to improve environmental safety, then toxicity decreases, but density and sinking speed deteriorate

Engineering Contradiction:

ImprovetoxicityVSAvoidsinking speed

Core Design Contradiction:

Object-affected harmful factorsVSSpeed

Solution Approach 1:

The patent optimizes the material parameters by precisely controlling the zinc-aluminum ratio and lead content to achieve the optimal balance point where toxicity is minimized while maintaining sufficient density (5-7 g/cm3) for effective sinking performance

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If zinc-aluminum alloy is used instead of lead, then environmental friendliness is improved, but achieving comparable density becomes more difficult

Engineering Contradiction:

Improveenvironmental friendlinessVSAvoiddensity

Core Design Contradiction:

Object-affected harmful factorsVSQuantity of substance

Solution Approach 1:

The patent uses composite material science by formulating a zinc-aluminum alloy with specific composition ratios (85-90% zinc, 8-12% aluminum) to achieve density of 5-7 g/cm3, which is comparable to lead while providing superior environmental friendliness

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the material parameters by controlling the alloy composition and physical dimensions of the lure body to achieve the required density and sinking characteristics without relying on high-lead content

Inventive Principle:

Principle #35Parameter changes

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

The zinc-aluminum alloy lure effectively attracts fish with its high-pitched sound and rapid movement, simulating baitfish, while being environmentally friendly and sinking at a comparable speed to lead lures.

Implementation Method 1

an elongated body having a density of about 5 to 7 g/cm3

Methodology Applied

Scientific EffectDensity:

Implementation Method 2

sinking at a comparable speed to lead lures

Methodology Applied

Scientific EffectGravity: Gravitation

Implementation Method 3

incorporating a balanced design and hydrodynamic shape to mimic wounded baitfish

Methodology Applied

Scientific EffectHydrodynamics:

Data Source

PatentUS12478051B2Fishing lure and methods of making and using same

Publication Date: 2025.11.25 MARTINI ROBERT C

AI summary

A fishing lure is described comprising an elongated body having a density of about 5 to 7 g/cm3, the fishing lure containing 85% to 90% by weight zinc, 8% to 12% by weight aluminum, and no more than 5% by weight lead. In some cases, the lure contains no more than 3% by weight lead.