Harpoon Tip With Flip Striker and Tungsten Alloy

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Solution Overview

Problem

Existing harpoon tips for underwater hunting suffer from rust, insufficient sharpness, rapid blunting upon impact, and manufacturing complexities, leading to reduced effectiveness and accuracy in penetrating large fish scales and maintaining straight arrow flight.

Innovation Solution

A harpoon tip featuring a tip body made of a heavy tungsten-based alloy with a striker made of tungsten carbide or titanium carbide, capable of being flipped 180 degrees to maintain sharpness and attach securely to the harpoon, reducing blunting and improving penetration and flight stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the peak is made of stainless steel, then it is corrosion resistant, but it is not sharp enough and easily blunts when hitting hard objects

Engineering Contradiction:

Improvecorrosion resistanceVSAvoidsharpness and penetration capability

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The invention uses a composite structure where the tip body is made of stainless steel for corrosion resistance, while the peak (striker) is made of tungsten carbide or titanium carbide for extreme hardness and sharpness. This combination allows the harpoon to resist rust while maintaining penetrating capability against large fish scales and hard objects.

Inventive Principle:

Principle #40Composite materials

2Strength

If the peak is made of durable steel, then it is strong, but it is prone to rust and easily blunts

Engineering Contradiction:

ImprovestrengthVSAvoidrust resistance and durability

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The stainless steel tip body provides corrosion resistance and structural strength, while the carbide peak provides extreme hardness. This composite material approach resolves the contradiction by assigning different material properties to different functional parts.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The harpoon tip is divided into separate components: the tip body and the peak (striker), which can be detached and replaced independently. This allows the peak to be flipped or replaced when blunted without affecting the tip body.

Inventive Principle:

Principle #1Segmentation

3Ease of manufacture

If a threaded connection is used to attach the tip, then it is easy to assemble, but it reduces strength at the connection point

Engineering Contradiction:

Improveassembly easeVSAvoidconnection strength

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The harpoon tip is designed as a detachable modular system where the tip body and striking part can be separated and reattached. This segmentation allows for easy assembly and replacement while maintaining sufficient connection strength through proper threading design.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11747119B2Harpoon tip of underwater weapon

Publication Date: 2023.09.05 OSAÜHING EURAD

AI summary

The harpoon tip of underwater weapon comprises a tip body with a threaded or other mounting system as well as one or more means for prey fixation. A striker is mounted on the tip body which has sharp peaks located at both ends of the striker, it is possible to flip the striker inside the body 180 degrees during hunting. The striker is made of a extremely strong hard alloy, substantially of tungsten carbide, titanium carbide or their combination, and the tip body is made of a heavy tungsten-based alloy.