Shape-Memory Spoon Head That Releases Overheated Liquids
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Solution Overview
Problem
Existing utensils, particularly spoons, do not effectively prevent children and the elderly from consuming hot food that can cause mouth burns, as they often lack simple and passive safety features to indicate or prevent the ingestion of excessively hot liquids.
Innovation Solution
A spoon with a head portion made from shape memory material that changes shape from concave to flat or opens when the liquid temperature exceeds a predetermined threshold, preventing the spoon from holding hot liquids, utilizing a two-way shape memory alloy like nickel-titanium and a coating such as nickel or TEFLON for safety and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a thermometer or temperature sensing device is used to detect hot food, then temperature measurement capability is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent replaces electronic temperature sensing devices with a passive mechanical shape memory alloy head that automatically changes shape based on temperature, eliminating complex electronics while maintaining temperature detection functionality
Solution Approach 2:
The shape memory alloy head performs temperature detection autonomously by changing its own shape in response to temperature, without requiring external power sources, controls, or user interpretation
2Loss of information
If a caution symbol or indication is added to the utensil, then temperature warning capability is improved, but device complexity increases
Solution Approach 1:
The patent uses shape changes (analogous to color changes) in the shape memory alloy head to provide intuitive visual feedback about temperature safety, eliminating the need for complex warning symbols or indicators
Solution Approach 2:
The utensil automatically provides temperature warning information through its own shape transformation, without requiring external warning devices or complex indication systems
3Adaptability or versatility
If the head portion is made entirely from shape memory material, then temperature-responsive functionality is improved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the spoon into two segments: a simple handle made from conventional materials and a shape memory alloy head, allowing each part to be manufactured using appropriate methods and then joined together
Solution Approach 2:
The patent applies shape memory material only to the head portion where temperature-responsive functionality is needed, while the handle uses simpler, easier-to-manufacture materials
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 spoon effectively prevents mouth burns by automatically releasing hot liquids when the temperature exceeds a safety threshold, ensuring safe consumption and providing a simple, inexpensive solution for vulnerable populations.
Implementation Method 1
the head portion being at least partially fabricated from a shape memory material, the head having a first shape to hold a liquid when the temperature of the liquid is less then a predetermined threshold temperature and a second shape so as to not hold the liquid when the temperature of the liquid is greater than the predetermined threshold
Data Source
AI summary
A spoon having: a handle portion; and a head portion connected to the handle portion, the head portion being at least partially fabricated from a shape memory material, the head having a first shape to hold a liquid when the temperature of the liquid is less then a predetermined threshold temperature and a second shape so as to not hold the liquid when the temperature of the liquid is greater than the predetermined threshold. The first shape is preferably a concave shape and the second shape is a substantially flat shape. Alternatively, the first shape is a concave shape and the second shape is a concave shape having at least one opening in the concave shape. A fork is also disclosed having times that change shape when the temperature of food held thereon is greater than a predetermined threshold.