Modern prosthetic devices often fail to fully rehabilitate amputees due to their inability to accurately emulate the balance of forces and movements generated by a biological ankle. This can lead to discomfort, asymmetry in gait, and pain in other parts of the body. The challenge is to create a prosthetic device that provides a more natural walking experience and reduces these issues.
The invention is a prosthetic device designed to assist human walking, specifically for below-knee amputees. The device incorporates biarticular and uniarticular Series Elastic Actuators (SEAs) that mimic the natural movements of the human ankle and knee, providing the necessary torque to facilitate a smooth and natural gait.
- Biarticular Series Elastic Actuator (SEA): Provides precise torque through biarticular series springs, enhancing joint movement control.
- Uniarticular SEA: Applies torque directly to the shank via uniarticular series springs for efficient lower limb movement.
- Parallel Springs: Offers additional torque, improving limb support and stability.
- High-Resolution Rotary Potentiometer: Ensures accurate measurement of ankle and knee angles for smooth walking.
- Impedance Control: Mimics natural ankle functionality using sensor data to follow predefined trajectories.
The device for assisting human walking features unique components that enhance its functionality. The biarticular series elastic actuator (SEA) connects to a thigh brace, applying torque through biarticular springs to improve coordination and stability. The uniarticular SEA, connected to shank plates, focuses torque on individual joints for controlled movements. Parallel springs provide additional torque, boosting support during weight-bearing phases. A high-resolution rotary potentiometer accurately measures ankle and knee angles for real-time adjustments. The impedance control system uses sensor data to mimic natural ankle functionality, adapting to various walking conditions for a seamless and efficient walking experience.
- Biarticular Series Elastic Actuator (SEA): uses a Biarticular Motor of nominal rating 100 W and helical springs
- Uniarticular Series Elastic Actuator (SEA): uses a Uniarticular Motor nominal rating of 50 W and helical springs, which may be enclosed in nylon housing to prevent buckling
- Ankle Joint: Mimics the uniarticular (Soleus and Tibialis Anterior) and biarticular (Gastrocnemius) muscles at the ankle to provide required torque and power during gait cycle
- Thigh Cuff: To be attached to a residual limb of a user
- Socket: For receiving the residual limb of the user
3
The prosthetic device aims to significantly improve the quality of life for below-knee amputees by providing a more natural and comfortable walking experience. It addresses the limitations of current prosthetics, potentially reducing the long-term physical complications and enhancing mobility, independence, and overall well-being for users.
Healthcare and Rehabilitation, Medical Devices and Orthopedics, Sports and Physical Therapy, Assistive Technology, Research and Development, Elderly and Disability Services, Retail and Consumer Goods
- Rehabilitation centers for amputees
- Prosthetics manufacturing and development
- Physical therapy and mobility assistance
201921033581
445195