Composite Stone-Look Arrowhead with Metal Insert

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Solution Overview

Problem

Modern hunting and sporting activities require more lethal and efficient arrowheads and spearheads, but traditional stone heads lack the performance characteristics needed for humane and effective hunting, while replicas of ancient stone heads fail to meet modern standards.

Innovation Solution

A weapon or tool head with a body resembling a chipped stone head, featuring a moldable outer body and a hard material insert to provide desired characteristics such as weight, durability, and penetration, allowing attachment to arrow or spear shafts, and designed to emulate ancient stone heads but with modern performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If traditional stone heads are used, then the appearance of ancient stone heads is achieved, but the performance characteristics (weight, durability, penetration) are insufficient for modern hunting

Engineering Contradiction:
Improveappearance of stone headVSAvoidperformance characteristics
Core Design Contradiction:
ShapeVSReliability

Solution Approach 1:

The patent applies composite materials by combining a stone-like outer body with metal inserts. The outer body is formed to resemble chipped stone, while metal inserts are embedded within to provide the necessary weight, durability, and penetration characteristics for modern hunting applications.

Inventive Principle:
Principle #40Composite materials

2Reliability

If modern metal arrowheads are used, then the performance characteristics for humane hunting are achieved, but the appearance of ancient stone heads is lost

Engineering Contradiction:
Improveperformance characteristicsVSAvoidappearance of stone head
Core Design Contradiction:
ReliabilityVSShape

Solution Approach 1:

The patent applies local quality by having different regions of the arrowhead with different properties. The outer body maintains the stone appearance for aesthetic purposes, while specific localized regions contain metal inserts that provide the necessary performance characteristics for hunting.

Inventive Principle:
Principle #3Local quality

3Shape

If plastic replicas of stone heads are used, then the appearance is achieved, but the durability and penetration ability are insufficient

Engineering Contradiction:
Improveappearance of stone headVSAvoiddurability and penetration
Core Design Contradiction:
ShapeVSStrength

Solution Approach 1:

The patent combines materials with different properties: the outer body is formed to resemble stone (similar to replicas), but metal inserts are embedded to provide the strength, durability, and penetration ability that plastic replicas lack.

Inventive Principle:
Principle #40Composite materials

Data Source

PatentUS11747118B2Weapon and tool head and method
Publication Date: 2023.09.05 KENT STATE UNIV
  • US11747118B2 patent drawing
  • US11747118B2 patent drawing
  • US11747118B2 patent drawing

AI summary

The invention is directed to a weapon or tool head that has an appearance that mimics chipped stone weapon- or tool heads used in prehistory and history. The weapon or tool head has an outer body portion having the desired “ancient” appearance and a hard insert is provided with at least one sharp edge exposed for use, the latter providing modern performance characteristics to the weapon or tool.