Portable CO Test Device Using Inflatable Balloon and Sealed Tablet

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Solution Overview

Problem

There is a lack of affordable and portable solutions to test compressed air in SCUBA tanks for carbon monoxide contamination, particularly in regions outside the United States where regular safety checks are not available.

Innovation Solution

A portable device consisting of a clear inflatable balloon containing a carbon monoxide-sensing tablet, which is activated by attaching the balloon to a SCUBA tank's air supply and observing color change after a set time, ensuring the tablet remains sealed until use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a portable carbon monoxide test device is created for SCUBA tanks, then accessibility and affordability improve, but device complexity increases

Engineering Contradiction:
ImproveAccessibility of CO testingVSAvoidStructure of test device
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The device is divided into separate functional components: a balloon for gas collection, a CO-sensitive tablet for detection, and a hermetic seal for preservation. This segmentation allows each component to be simple and inexpensive while collectively providing portable CO testing capability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The balloon acts as an intermediary between the SCUBA tank air supply and the CO-sensitive tablet. It collects and contains the air sample, allowing the tablet to interact with the gas without requiring direct contact with the tank, thus simplifying the overall device structure.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Productivity

If the CO sensing tablet is activated immediately, then testing can begin, but the tablet may be activated prematurely before actual use

Engineering Contradiction:
ImproveReadiness for testingVSAvoidFalse activation of tablet
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The balloon and tablet are prepared and sealed together in advance, with the balloon already attached to the tablet container. This preliminary assembly allows the device to be ready for immediate use while the hermetic seal prevents premature activation of the CO-sensitive tablet until the actual testing moment.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The hermetic seal creates an inert, protected environment that isolates the CO-sensitive tablet from ambient air and carbon monoxide exposure during storage and transport. This ensures the tablet remains inactive and reliable until deliberately activated during the testing procedure.

Inventive Principle:
Principle #39Inert atmosphere (Inert environment)

3Illumination intensity

If the balloon is made transparent, then color change observation is easier, but material selection becomes more limited

Engineering Contradiction:
ImproveVisibility of color changeVSAvoidBalloon material selection
Core Design Contradiction:
Illumination intensityVSEase of manufacture

Solution Approach 1:

The device utilizes the color change property of the CO-sensitive tablet as the primary detection mechanism. By making the balloon transparent or translucent, the tablet's color change becomes visually observable, providing a clear indication of carbon monoxide presence without requiring additional sensors or complex detection systems.

Inventive Principle:
Principle #32Color changes

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

Provides a low-cost, portable method for determining carbon monoxide presence in SCUBA tank air, ensuring user safety by visually indicating contamination within a reasonable time frame.

Implementation Method 1

a tablet that changes color when exposed to carbon monoxide

Methodology Applied
Scientific EffectColor change: Thermochromism

Data Source

PatentUS9151716B1Portable carbon monoxide test device for scuba air tanks
Publication Date: 2015.10.06 LAUGHLIN ROBERT M
  • US9151716B1 patent drawing
  • US9151716B1 patent drawing
  • US9151716B1 patent drawing

AI summary

A device for testing a scuba tank air supply for carbon monoxide comprising a transparent or clear inflatable enclosure such as a balloon and a tablet that changes color when exposed to carbon monoxide mounted inside said balloon and a hermetically sealed package containing the balloon and the CO tablet to prevent the activation of the tablet prior to testing the air supply in the scuba tank.