Mechanical Broadhead Arrowhead Force Adjustment for Stable Blade Deployment

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Solution Overview

Problem

Existing mechanical broadhead arrowheads face issues with unreliable deployment mechanisms, leading to unpredictable flight paths and inadequate entry wounds due to premature or incomplete blade deployment, exacerbated by varying bow types and draw weights.

Innovation Solution

A mechanical broadhead arrowhead with a ferrule and pivotally mounted blades, featuring a force adjustment mechanism using a threaded adjustment member and biasing member to control blade deployment, allowing adaptation to different bows and target distances.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a mechanical broadhead arrowhead uses a retaining mechanism with friction-based annular retaining rings or bands to hold deployable appendages closed, then the aerodynamic effect during flight is reduced, but the deployment reliability varies with different bow types and draw weights

Engineering Contradiction:

Improvedeployment reliabilityVSAvoidadaptability to different bow types

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies parameter changes by providing multiple retaining members with different friction characteristics and/or different release forces. This allows the arrowhead to be adapted to different bow types and draw weights by selecting or adjusting the retaining force parameters, ensuring reliable deployment across various archery equipment configurations.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent achieves universality by designing a retaining mechanism that can accommodate multiple bow types through adjustable or selectable retaining forces. The mechanism serves multiple functions by maintaining closed appendages during flight for various bow configurations while ensuring reliable deployment when activated, making the arrowhead versatile across different archery equipment.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Stability of the object's composition

If the bladed appendages are held closed during flight using friction-based retaining mechanisms, then flight stability is improved, but the force required to deploy the blades varies and may not be sufficient for all bow types

Engineering Contradiction:

Improveflight stabilityVSAvoiddeployment force

Core Design Contradiction:

Stability of the object's compositionVSForce

Solution Approach 1:

The patent changes the force parameter by providing multiple retaining members with different friction characteristics and release forces. This allows optimization of the balance between maintaining closed appendages for flight stability and enabling deployment with sufficient force for different bow types.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies dynamics by making the retaining force adjustable or selectable based on the specific application. The retaining mechanism can be configured to provide appropriate friction forces for flight stability while allowing deployment when the activation force is applied, adapting to different bow configurations.

Inventive Principle:

Principle #15Dynamics

3Object-affected harmful factors

If the bladed appendages are designed to open upon impact, then a large entry wound is created, but premature deployment in mid-flight can occur causing unpredictable flight paths

Engineering Contradiction:

Improveentry wound sizeVSAvoidflight path predictability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent applies preliminary anti-action by providing multiple retaining members that preemptively counteract premature deployment forces during flight. The retaining mechanism is designed to resist opening forces until the arrow impacts the target, ensuring the appendages remain closed during flight for predictable trajectories while enabling large entry wounds upon impact.

Inventive Principle:

Principle #9Preliminary anti-action

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 arrowhead ensures reliable blade deployment based on user-adjustable force settings, maintaining flight stability and achieving consistent, humane entry wounds across various bow types and target distances.

Implementation Method 1

a biasing member disposed between the adjustment member and the detent member, the biasing member exerting a biasing force on the detent member

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

an extent of threaded receipt of the adjustment member within the ferrule body is operable to vary a biasing force of the biasing member

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Data Source

PatentUS20250362119A1Mechanical broadhead arrowhead with force adjustment feature

Publication Date: 2025.11.27 VANTAGE POINT ARCHERY LLC

AI summary

A mechanical broadhead arrowhead for use with an arrow in archery. The arrowhead has a ferrule with a cylindrical threaded base and blades pivotally mounted to the ferrule. The arrowhead has a force adjustment member which is operable by a user to vary the force imparted on the blades to maintain the blades in a closed position during flight of the arrow.