Thermoformed Prosthetic Foot with Universal Socket
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Solution Overview
Problem
Prosthetic devices are expensive, making them unaffordable for amputees in third-world countries, where there is a need for a cost-effective and effective solution for below-knee and above-knee amputations.
Innovation Solution
Development of inexpensive prosthetic devices comprising a thermoformed artificial foot, optional artificial knee, and a universal socket, which can be combined with additional components, using materials like polypropylene and CREPE neoprene, and featuring adjustable rigid members and tensioning mechanisms for customizable fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional prosthetic devices are used, then functional performance is achieved, but cost becomes prohibitively high
Solution Approach 1:
The prosthetic device is divided into modular components including a socket, pylon, ankle, and foot that can be manufactured separately and assembled. This segmentation enables cost-effective production of individual components while maintaining overall functional performance.
Solution Approach 2:
The socket is designed with universal attachment mechanisms that can accommodate various pylon, ankle, and foot configurations. This multi-functionality allows a single socket design to serve multiple amputation types and user needs, reducing overall system cost.
2Ease of operation
If customized prosthetic components are manufactured, then fit and comfort are improved, but manufacturing complexity and cost increase
Solution Approach 1:
The socket incorporates adjustable parameters including removable rings, adjustable straps, and modular components that can be modified to accommodate different stump sizes and shapes. These parameter changes enable customization without requiring complex manufacturing processes for each individual component.
Solution Approach 2:
The prosthetic device includes dynamic adjustment mechanisms such as adjustable ankle angles, removable foot plates, and flexible cushioning materials that can be modified based on user needs and stump condition changes over time, providing ongoing customization 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 provides a cost-effective, adjustable, and customizable prosthetic solution that can be adapted to various stump sizes, reducing the financial burden on amputees and improving mobility while accommodating swelling and wound healing.
Implementation Method 1
a thermoformed foot member having a foot member first end, a foot member second end opposite the foot member first end
Implementation Method 2
using materials like polypropylene and CREPE neoprene
Data Source
AI summary
Prosthetic devices containing an artificial foot are disclosed. Methods of making and using prosthetic devices containing an artificial foot are also disclosed. The artificial foot may be in the form of a thermoformed foot member having at least one foot member curved section between a foot member first end and a foot member second end opposite the foot member first end such that (a) a first portion of a foot member inner surface overlaps and faces a second portion of the foot member inner surface, (b) a foot member second end surface is positioned (i) between and connecting a foot member outer surface and the foot member inner surface to one another and (ii) over and facing the foot member second end surface along the at least one foot member curved section.