Oxy-Fuel Torch Quick Connectors for Global Hose Compatibility

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Solution Overview

Problem

Existing oxy-fuel torches face issues with standardized threaded connections that vary by country, leading to multiple torch designs, fragility due to exposed connectors, and damage during handling and transportation.

Innovation Solution

The oxy-fuel torch features non-threaded, permanently connected inlet connectors joined by brazing, utilizing quick connectors with relief elements and a tubular design for secure and protected connections, allowing for a single torch design suitable for all countries and reducing manufacturing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If threaded inlet connectors are used according to country-specific standards, then the torch can be adapted to different countries' gas hose standards, but it requires manufacturing multiple torch designs and increases device complexity

Engineering Contradiction:

Improveadaptability to different country standardsVSAvoidnumber of torch designs

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The connection system is divided into two independent parts: a universal non-threaded inlet connector permanently fixed to the torch body, and a separate country-specific quick connector that attaches to the gas hose. This segmentation allows the torch body to remain identical across all countries while only the detachable quick connectors need to vary by region.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A universal non-threaded inlet connector serves as an intermediary element between the torch body and country-specific quick connectors. This intermediary maintains a consistent interface on the torch while allowing different standardized quick connectors to attach, thus mediating between the universal torch design and country-specific requirements.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If threaded inlet connectors are used, then connections can be made according to standardized threads, but the connectors become fragile and sensitive to dust

Engineering Contradiction:

Improvestandardized threaded connectionsVSAvoidconnector durability and dust sensitivity

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The traditional threaded mechanical connection system is replaced with a non-threaded push-to-connect system. The inlet connectors have a simple tubular shape without threads, and the quick connectors use a push-in mechanism with retention elements, eliminating the fragile threaded structure while maintaining secure connections.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The connection interface uses a flexible seal element (thin film) within the quick connector that deforms to create a gas-tight seal when pushed onto the inlet connector. This flexible sealing mechanism replaces the rigid threaded connection, providing both durability and protection against dust ingress.

Inventive Principle:

Principle #30Flexible shells and thin films

3Ease of operation

If inlet connectors project beyond the torch handle, then they are easily accessible for connection, but they are directly exposed to environment and can be damaged during transportation and handling

Engineering Contradiction:

Improveaccessibility of connectorsVSAvoiddamage during transportation

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The inlet connectors are nested within a protective recess or bore in the torch handle, with the quick connectors being inserted into and contained by the handle structure. This nesting arrangement protects the connectors from external damage during transportation while maintaining accessibility during operation.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

A protective recess or bore is provided in the torch handle beforehand to accommodate and protect the inlet connectors. This pre-designed protective structure cushions the connectors against impacts and environmental damage during transportation and handling, while still allowing easy access when needed.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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

This solution enhances reliability and reduces manufacturing complexity by eliminating country-specific designs, protects connectors from damage, and ensures secure gas flow connections, leading to a more robust and cost-effective oxy-fuel torch.

Implementation Method 1

each inlet connector is joined to each inlet port by brazing

Methodology Applied

Scientific EffectBrazing: Brazing

Data Source

PatentUS10890324B2Oxy-fuel torch having quick connection means

Publication Date: 2021.01.12 LINCOLN ELECTRIC ITALA SRL

AI summary

The invention related to an oxy-fuel torch comprising a handle By which the torch can be manipulated, at least two gas channels arranged through said handle for conveying at least a flow of fuel gas and a flow of oxidizing gas between respective inlets ports and outlet ports, and inlet connectors in fluidic communication with each inlet ports, the inlet connectors being configured to fluidly connect each inlet port to corresponding gas hose via intermediate connection means. According to the each inlet connector is a non-threaded connector and is permanently connected with each inlet port.