Prosthetic Foot Mounting Bracket with Compression Torsion Joint
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Solution Overview
Problem
Conventional prosthetic feet do not replicate the natural action of a real foot, leading to instability and discomfort for amputees due to 'kickback' and vibration issues, which can cause involuntary movements and imbalance.
Innovation Solution
A prosthetic foot with a mounting bracket featuring a compression torsion joint and a resilient design that includes a bumper member for energy return and a toe pad with spacers for improved shock absorption and stability, mimicking natural foot movement and reducing vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional rigid prosthetic foot is used, then structural strength is maintained, but kickback and vibration occur causing instability and discomfort
Solution Approach 1:
The patent applies flexible elements including an elastomeric bumper member and a resilient compression torsion joint that allow controlled deformation to absorb impact energy and reduce kickback forces while maintaining structural integrity during normal use
Solution Approach 2:
The patent changes the mechanical parameters of the prosthetic foot by introducing compliant elements with specific durometer values (e.g., 60-90 durometer for the bumper member) and torsional stiffness characteristics that optimize both shock absorption and stability across different gait phases
2Reliability
If a resilient mounting bracket with compression torsion joint is added, then shock absorption and natural gait are improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into integrated components: the mounting bracket simultaneously provides structural attachment, torsional rotation capability, and shock absorption through its compression torsion joint, while the bumper member integrates energy return and impact absorption functions
3Reliability
If the bumper member is positioned to provide energy return, then gait naturalness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the prosthetic foot into distinct functional zones with the bumper member positioned in the heel region, the compression torsion joint at the ankle simulation point, and the toe pad at the distal end, allowing each component to be manufactured and positioned independently with standardized interfaces
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 more natural gait and increased stability by absorbing shock and allowing torsional rotation, reducing the risk of injury and improving the overall walking experience for amputees by minimizing 'kickback' forces and vibrations.
Implementation Method 1
a compression torsion joint connecting the upper member to the lower member
Implementation Method 2
a compression torsion joint connecting the upper member to the lower member
Implementation Method 3
A prosthetic foot with a mounting bracket featuring a compression torsion joint and a resilient design
Data Source
AI summary
A mounting bracket for a prosthetic foot configured to attach to a residual limb, comprising an upper member, a lower member and compression torsion joint. The upper member comprises an upper flange, a mating post, and mounting portion configured to attach to the residual limb. The lower member comprises a mating portion, a lower flange, and a mounting portion configured to attach to the prosthetic foot. The compression torsion joint couples the upper member to the lower member and is configured to limit the vertical movement and torsional movement of the upper member with respect to the lower member.