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Biomimetic Slope Adaptive Foot-Ankle Prosthesis

Award Information
Agency: Department of Defense
Branch: Defense Health Agency
Contract: W81XWH18C0314
Agency Tracking Number: H2-0299
Amount: $999,816.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: DHP16C-007
Solicitation Number: 16.C
Solicitation Year: 2016
Award Year: 2018
Award Start Date (Proposal Award Date): 2018-07-27
Award End Date (Contract End Date): 2020-12-28
Small Business Information
115 North Wright Brothers Dr.
Salt Lake City, UT 84116
United States
DUNS: 177661386
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Edwin K Iversen
 Vice President of Research & Development
 (801) 326-3434
Business Contact
 Arthur Dyck
Phone: (801) 326-3434
Research Institution
 Minnesota Veterans Medical Research and Education Foundation (MVMREF)
 Larry Kuusisto, Ph.D Larry Kuusisto, Ph.D
One Veterans Drive Array
Minneapolis, MN 55417
United States

 (612) 467-5732
 Nonprofit College or University

The primary objective is to develop a commercially-viable prototype of the slope adaptive prosthesis design and to iteratively improve the design based on ISO standards testing and rigorous use in human subject field trials. The proposed work will build upon knowledge gained in Phase I of the project, which established feasibility for this design approach in a lightweight, passive hydraulic foot-ankle system. The Biomimetic Slope Adaptive Foot developed in this project seeks to mimic the physiologic ankle by storing energy sooner in the gait cycle, setting the equilibrium point at foot-flat instead of mid-stance, which allows energy to be stored over a larger range of motion and released to the user during unloading. This is expected to provide a greater amount of energy storage and return. Current non-powered (passive) foot-ankle prostheses cannot adapt or change alignment to different terrain during walking. They are less stable than an articulated ankle, which can reach foot-flat very soon after heel strike. The proposed foot will have automatic slope adaptation through hydraulic ankle articulation. The purely mechanical system, without battery pack or electronics, will be inherently more rugged and robust, meeting the needs of active prosthesis wearers, whether service members, veterans or civilians.

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

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