Elapsed Time Indicator Using Fluid Flow Control
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Solution Overview
Problem
Existing solutions for tracking the elapsed time since a container is first opened are often expensive, inaccurate, or unreliable, posing health risks for perishable products and potentially leading to premature device failure in industries like food, pharmaceuticals, and oil and gas.
Innovation Solution
An elapsed time indicator system comprising a visual display arrangement and an activator arrangement that changes appearance based on the time since the container was first opened, using a fluid reservoir and conduit network to control the flow of a reactant to the display, which can indicate time elapsed through color changes or other optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional time tracking methods are used, then the container opening time can be recorded, but the solution is expensive, inaccurate or unreliable
Solution Approach 1:
The elapsed time indicator is designed to automatically activate and track time without requiring external power sources, electronic components, or manual intervention. The system uses the container's own contents (food products) to power the indicator through biochemical reactions, making the system self-sufficient and eliminating the need for expensive batteries or electronic circuitry
Solution Approach 2:
The patent replaces electronic and mechanical time-tracking systems with a biochemical system. Instead of using batteries, motors, or electronic circuits, the invention uses enzymatic reactions and chemical indicators that naturally occur in food products to drive the time indication mechanism, thereby eliminating complex mechanical and electronic components
2Measurement precision
If electronic time monitoring devices are used, then accurate time tracking is achieved, but the devices are expensive and complex
Solution Approach 1:
The indicator system activates automatically when the container is opened and uses the natural biochemical properties of the food contents to drive the time tracking mechanism, requiring no external power, control systems, or complex electronics
Solution Approach 2:
The system measures elapsed time by tracking changes in biochemical parameters (such as pH changes, color reactions, or enzymatic activity) that occur naturally in food products over time, rather than using mechanical or electronic counters. The visual indicator changes its physical state (color, transparency) in direct proportion to the time elapsed since opening
3Loss of information
If no time indication system is used, then manufacturing costs are low, but it is difficult to determine product degradation and safety
Solution Approach 1:
The elapsed time indicator uses color-changing materials or chemical indicators that visually display the passage of time since the container was opened. As the indicator progresses through time, it changes color or transparency, providing an intuitive visual signal to consumers about the remaining safe usage period of the food product
Solution Approach 2:
The indicator system uses the food product's own biochemical properties to power and drive the time indication mechanism, eliminating the need for external power sources or complex manufacturing processes while providing continuous visual feedback about product freshness and safety
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 reliable and cost-effective method to track the time since a container was opened, ensuring product safety and device maintenance by accurately indicating the remaining shelf life or service interval.
Implementation Method 1
the conduit having a cross-section that varies along the length of the conduit so as to at least partially establish the predetermined flow rate
Implementation Method 2
which can indicate time elapsed through color changes or other optical properties
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
An elapsed time indicator (2), comprises an activator arrangement (25) comprising a fluid reservoir (20) and a conduit (22) configured to provide a predetermined flow rate of fluid (21) along the conduit (22). The elapsed time indicator (2) further comprises a visual display arrangement (18) configured to change appearance on exposure to the fluid (21). The conduit (22) connects the fluid reservoir (20) to the visual display arrangement (18). The activator arrangement (25) is configured to release fluid (21) from the fluid reservoir (20) in response to an activation event to permit the fluid (21 ) to flow.