Stretch Cord Assemblies for Controlled Tibial Progression
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Solution Overview
Problem
Conventional orthosis devices fail to provide controlled tibial progression, decrease plantarflexion moment at initial contact, and produce active plantar flexion moments in late stance, which are essential for proper ambulation and therapeutic applications, especially for patients with sagittal instabilities and limited range of motion.
Innovation Solution
A dynamic cushion heel-ankle-foot orthosis system with an anterior or posterior cord assembly, featuring a leg calf shell with a plantar flexion ridge and a boot shell with a corresponding ridge, allowing controlled rotation and providing adjustable support through a stretch cord assembly for controlled tibial progression and active plantarflexion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional orthosis devices are used, then structural support is provided, but controlled tibial progression and active plantar flexion moments cannot be achieved
Solution Approach 1:
The orthosis incorporates a dynamic cord assembly with stretch cords that allow controlled movement and progression. The cord assembly includes a first cord and second cord that can be independently adjusted, enabling the device to adapt dynamically to patient needs while providing reliable controlled tibial progression and active plantar flexion moments.
Solution Approach 2:
The orthosis is divided into separate functional components including a leg calf shell, boot shell, and independent cord assemblies. The first cord and second cord are separate elements that can be individually adjusted, allowing precise control over tibial progression and plantar flexion moments while maintaining overall structural support.
2Stability of the object's composition
If rigid structural support is provided, then stability is achieved, but controlled rotation and active plantarflexion are limited
Solution Approach 1:
The orthosis uses dynamic cord assemblies with stretch cords that enable controlled rotation between the leg calf shell and boot shell. The cords provide elastic resistance that allows controlled movement while maintaining structural stability, and can be adjusted to accommodate different ranges of motion needed for various therapeutic applications.
Solution Approach 2:
The orthosis allows adjustment of cord tension and configuration to change the mechanical properties of the device. By modifying the tension in the first cord and second cord, the device can adapt to provide appropriate controlled rotation and plantar flexion moments for different patient conditions and therapeutic goals.
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 system enables controlled tibial progression, reduces plantarflexion moment at initial contact, and produces active plantar flexion moments in late stance, effectively addressing the limitations of conventional orthosis devices for patients with specific mobility issues.
Implementation Method 1
a stretch cord assembly for controlled tibial progression and active plantarflexion
Data Source
AI summary
A method, system, apparatus, and/or device for supporting a plantar flexion ridge. The method, system, apparatus, and/or device may include: a sheath; a stretch cord extending along an interior of the sheath from a first end of the sheath to a second end of the sheath; a first buckle attached to a first end of the stretch cord; a first sleeve configured to cover at least a portion of the first end of stretch cord; a second buckle attached to a second end of the stretch cord; and a second sleeve configured to cover at least a portion of the second end of stretch cord.