Arrowhead Connector Using Nested Insert and Outsert

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Solution Overview

Problem

The existing 8-32 female thread inserts are inadequate for arrow shafts with an inside diameter of 0.166″, necessitating alternative attachment methods for arrowheads, such as the use of outserts that slide over the shaft's outside surface.

Innovation Solution

A connector system comprising an insert and an outsert, where the insert is configured to fit within the arrow shaft and the outsert is designed to attach to the arrowhead, utilizing complementary threads and structural features like collars and ledges to secure the arrowhead to the shaft, preventing thread stripping and enhancing attachment methods like adhesives or friction fits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a standard 8-32 female thread insert is used, then the arrowhead can be attached to the shaft, but the insert cannot fit inside arrow shafts with an inside diameter of 0.166"

Engineering Contradiction:

Improvecompatibility with different shaft diametersVSAvoidattachment system structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The insert is nested within the outsert, creating a combined attachment system. The insert fits inside the outsert's internal diameter, allowing the threaded portion to engage with the arrow shaft while the outsert provides additional structural support and compatibility with smaller diameter shafts that cannot accommodate a standalone insert.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If an outsert is used instead of an insert, then the arrowhead can be attached to small diameter shafts, but the thread stripping risk increases

Engineering Contradiction:

Improvecompatibility with small diameter shaftsVSAvoidthread attachment reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The insert and outsert are merged into a single functional unit where the insert's threads engage with the arrow shaft and the outsert provides additional structural reinforcement. This combination merges the advantages of both components: the insert's proven thread engagement reliability and the outsert's compatibility with small diameter shafts, thereby preventing thread stripping while maintaining adaptability.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If a combined insert-outsert system is used, then reliability is improved, but the device complexity increases

Engineering Contradiction:

Improveattachment reliabilityVSAvoidconnector system structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The connector is segmented into two distinct but integrated components: the insert and the outsert. This segmentation allows each component to be optimized for its specific function while working together as a unified system. The insert handles thread engagement with the shaft, while the outsert provides structural support and shaft compatibility, thereby achieving high reliability without excessive overall complexity.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11885603B2Connector coupling an arrowhead and arrow shaft

Publication Date: 2024.01.30 FERADYNE OUTDOORS LLC

AI summary

A connector for coupling an arrow shaft and an arrowhead to each other includes an insert configured for coupling with the arrow shaft and an outsert configured for coupling with an arrowhead.