Inflatable Pressure Gauge With Diaphragm Indicator for Low-Pressure Accuracy
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Solution Overview
Problem
Existing pressure gauges for inflatable articles are often large, inaccurate, and require separate mechanisms for pressure readings, especially at low pressures, and are not suitable for permanent attachment, leading to potential inaccuracies due to pressure build-up in the system.
Innovation Solution
A compact pressure gauge with a diaphragm and indicating element within a housing, where the diaphragm expands to move the indicating element longitudinally, providing a direct pressure indication without the need for a separate dial, and includes a biasing element to return the indicating element to its initial position upon pressure reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate dial or meter mechanism is used to provide pressure reading, then the pressure gauge can be provided on inflation devices, but the pressure gauge becomes relatively big and not suitable for permanent attachment to inflatable articles
Solution Approach 1:
The patent merges the pressure indication function directly into the valve assembly by integrating the diaphragm, indicating element, and housing into a single compact unit that attaches directly to the inflatable article. This eliminates the need for separate dials or meters, reducing the overall size while maintaining accurate pressure measurement capability.
Solution Approach 2:
The pressure gauge is segmented into functional components (diaphragm, indicating element, housing) that can be independently optimized and then assembled into a compact integrated unit. The diaphragm responds directly to pressure changes while the indicating element provides visual feedback, all within a small housing suitable for permanent attachment.
2Ease of operation
If mechanical pressure gauges are placed downstream of valve mechanism and hose, then the pressure gauge can be provided on inflatable devices, but the pressure sensing becomes inaccurate due to additional pressure build-up in the system
Solution Approach 1:
The pressure sensing function is extracted from the downstream location and placed directly at the valve assembly where pressure changes originate. The diaphragm is positioned to sense pressure changes at the source, eliminating the intermediate hose and valve mechanism that cause pressure build-up and measurement inaccuracies.
Solution Approach 2:
The diaphragm acts as an intermediary element that directly transmits pressure changes from the inflatable article to the indicating element. This direct coupling ensures accurate pressure measurement without the distorting effects of hoses and intermediate valve mechanisms.
3Measurement precision
If piston-based arrangements are used for pressure measurement, then the pressure gauge can provide readings, but the arrangement is too long to be attached to certain inflatable articles
Solution Approach 1:
The patent transitions from a longitudinal piston-based arrangement to a radial or lateral diaphragm expansion arrangement. The diaphragm expands perpendicular to the pressure application direction, allowing the indicating element to move in a different dimension and providing compact length while maintaining accurate pressure measurement capability.
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 solution allows for accurate pressure measurement at low pressures, is cost-effective, and can be permanently attached to inflatable articles, eliminating the need for separate dials and reducing inaccuracies caused by system pressure build-up.
Implementation Method 1
The diaphragm is configured to expand upon an increase in pressure within the inflatable article
Implementation Method 2
a biasing element to return the indicating element to its initial position upon pressure reduction
Data Source
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AI summary
The present disclosure relates to a pressure gauge for an inflatable article. The pressure gauge comprises a housing. The pressure gauge comprises an indicating chamber defined within the housing. The pressure gauge comprises a resilient diaphragm located within the housing. The diaphragm is configured to expand upon an increase in pressure within the inflatable article. The diaphragm has a first surface and a second, opposing surface. The first surface of the diaphragm is configured to be in fluid communication with the interior of the inflatable article and the second surface of the diaphragm defines a boundary of the indicating chamber. The pressure gauge further comprises an indicating element located within the indicating chamber. The pressure gauge is configured so that the indicating element is moveable, by an expansion of the diaphragm, in a first direction away from a first position. The position of the indicating element relative to the housing provides an indication of the pressure within the inflatable article.