Multilayer Protective Boot Combining Flame and Chainsaw Resistance

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current protective footwear for emergency response personnel, such as firefighters and chainsaw operators, lacks comprehensive protection against flame, electric shock, toe and sole impact, and chainsaw penetration, failing to meet stringent safety standards like NFPA 1971:2007 and CE/EN ISO 20345-2:1996 for firefighters and CSA Class 1/ANSI and CE Chainsaw Class 3 for chainsaw operators.

Innovation Solution

A multilayer protective boot design featuring a rubber blend for flame and electric shock resistance, Kevlar and polyamide tricot for chainsaw cut resistance, and a specific layer configuration in the vamp, leg, sole, and toe cap to withstand chainsaw penetration, meeting multiple safety standards through a combination of materials and layering.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional firefighter footwear is used, then flame resistance and electric shock resistance are provided, but chainsaw cut resistance and penetration resistance are insufficient

Engineering Contradiction:

Improvechainsaw cut resistanceVSAvoidprotection reliability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The boot combines multiple materials with different protective properties: rubber blend for flame and electric shock resistance, Kevlar for cut resistance, and polyamide tricot for chainsaw penetration resistance. This composite material approach allows the boot to simultaneously meet firefighter standards (NFPA 1971:2007) and chainsaw operator standards (CE Chainsaw Class 3, CSA Class 1/ANSI).

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The boot is divided into multiple functional layers, each designed to resist specific hazards. The multilayer construction includes distinct layers for flame resistance, electric shock resistance, cut resistance, and penetration resistance, allowing each layer to specialize in countering a particular threat while collectively providing comprehensive protection.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If protective footwear meets firefighter standards, then flame and electric shock resistance are achieved, but chainsaw operator standards for cut and penetration resistance are not met

Engineering Contradiction:

Improvemulti-standard complianceVSAvoidboot structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The boot is designed to universally meet multiple safety standards simultaneously - both firefighter standards (NFPA 1971:2007, CE/EN ISO 20345-2:1996) and chainsaw operator standards (CE Chainsaw Class 3, CSA Class 1/ANSI). The multilayer construction with specialized materials enables the single boot to perform multiple protective functions: flame resistance, electric shock resistance, cut resistance, and penetration resistance.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Strength

If prior art protective devices are used in combination with firefighter boots, then limited chainsaw blade contact resistance is achieved, but full penetration resistance and unitary boot design are not provided

Engineering Contradiction:

Improvechainsaw penetration resistanceVSAvoidboot design integration

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The invention merges all protective functions into a single unitary boot design. The multilayer construction integrates flame resistance, electric shock resistance, cut resistance, and penetration resistance into one cohesive structure, eliminating the need for separate protective devices worn in combination with firefighter boots. This integrated approach provides full penetration resistance while maintaining design simplicity.

Inventive Principle:

Principle #5Merging (Combining)

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 boot provides comprehensive protection against flames, electric shocks, toe and sole impacts, and chainsaw cuts, meeting the specified safety standards by utilizing a rubber blend, Kevlar, and polyamide tricot layers, ensuring safety and performance for emergency response personnel.

Implementation Method 1

The protective boot has means for flame resistance

Methodology Applied

Scientific EffectFlame resistance:

Implementation Method 2

The protective boot has means for electric shock resistance

Methodology Applied

Scientific EffectElectric shock resistance: Electrical Resistance

Implementation Method 3

Kevlar and polyamide tricot for chainsaw cut resistance

Methodology Applied

Scientific EffectChainsaw cut resistance:

Data Source

PatentUS8307568B2Multilayer protective boot

Publication Date: 2012.11.13 ALLIANCE MERCANTILE

AI summary

There is provided a multilayer protective boot having means for flame resistance, electric shock resistance and chainsaw cut resistance. The boot is designed to meet all of the NFPA 1971:2007, CE/EN ISO 20345-2:1996, and CSA-Ω standards for firefighter protective footwear and the CE/EN ISO 20345-2 SB E, CSA Class 1/ANSI, CE Chainsaw Class 3, and CSA “Green Tree” Chainsaw Z195-02 standards for chainsaw operator protective footwear These standards are met through the use of layers of Kevlar®, rubber and polyamide tricot materials in the vamp, leg, sole, toe cap and back reinforcement regions of the protective boot.