New Electro-Hydraulic Foot Prosthesis

Award Information
Agency: Department of Education
Branch: N/A
Contract: H133S100080
Agency Tracking Number: H133S100080
Amount: $500,000.00
Phase: Phase II
Program: SBIR
Awards Year: 2010
Solicitation Year: N/A
Solicitation Topic Code: 84.133S-2
Solicitation Number: N/A
Small Business Information
115 North Wright Brothers Drive, Salt Lake City, UT, 84116
DUNS: 999999999
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
Business Contact
Research Institution

This project develops an electronic-controlled version of the advanced hydraulic foot/ankle (MCI Foot) demonstrating the feasibility of the automatic adjustment of resistance throughout the range of motion. The advanced MCI Foot, especially the automatic-controlled version, contributes to the function of the prosthesis wearer, resulting in advanced and more natural walking benefits. The project objectives include: (1) Implementation of electric servo-valves into the existing foot-ankle design. Manual valves have been developed at present, and in preliminary testing, shown to be successful at setting the foot wearer’s preference for dorsi-flexion and plantar flexion; (2) Development of sensor for ankle position, inclination, temperature, and load for integration into the ankle electronic Controller. The sensors utilize a rugged design, for long-term reliable usage in the foot, and small size to fit within the anatomical shape of the foot; (3) Implementation of an algorithm for ankle control by microprocessor. The automatic control of ankle resistance depends upon the variable of position, inclination, and load, indicating the point in the gait cycle in which the walker’s step is taken. The temperature is automatically compensated for as the hydraulic fluid warms and changes viscosity. Success in the function of the auto-controller is evaluated in-house, in the Foot Testing Center.

* Information listed above is at the time of submission. *

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government