Special Section Technical Briefs

Evaluation of a Two Degree of Freedom Passive Ankle Prosthesis With Powered Push-Off1

[+] Author and Article Information
Jacob J. Rice, Joseph M. Schimmels

Department of Mechanical Engineering,
Marquette University,
Milwaukee, WI 53233

Accepted and presented at The Design of Medical Devices Conference (DMD2015), April 13–16, 2015, Minneapolis, MN, USA.

Manuscript received March 3, 2015; final manuscript received March 17, 2015; published online July 16, 2015. Editor: Arthur Erdman.

J. Med. Devices 9(3), 030915 (Sep 01, 2015) (2 pages) Paper No: MED-15-1071; doi: 10.1115/1.4030551 History: Received March 03, 2015; Revised March 17, 2015; Online July 16, 2015

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Ziegler-Graham, K., MacKenzie, E. J., Ephraim, P. L., Travison, T. G., and Brookmeyer, R., 2008, “Estimating the Prevalence of Limb Loss in the United States: 2005 to 2050,” Arch. Phys. Med. Rehabil., 89(3), pp. 422–429. [CrossRef] [PubMed]
Deans, S. A., McFayden, A. K., and Rowe, P. J., 2008, “Physical Activity and Quality of Life: A Study of a Lower-Limb Amputee Population,” Prosthet. Orthotics Int., 32(2), pp. 186–200. [CrossRef]
Collins, S., and Kuo, A., 2010, “Recycling Energy to Restore Impaired Ankle Function During Human Walking,” PLoS One, 5(2), p. e9307. [CrossRef] [PubMed]
Rice, J. J., and Schimmels, J. M., 2014, “Design and Evaluation of a Passive Ankle Prosthesis With Rotational Power Generation by a Compliant Coupling Between Leg Deflection and Ankle Rotation,” ASME Paper No. DETC2014-35651. [CrossRef]
Winter, D. A., 2009, Biomechanics and Motor Control of Human Movement, 4th ed., Wiley, Hoboken, NJ.


Grahic Jump Location
Fig. 3

Ankle torque-angle curves for the CamWalk with early drop timing. Subject 2 mass: 73.5 kg.

Grahic Jump Location
Fig. 2

Ankle torque-angle curves for the CamWalk and the amputee’s original prosthesis. Subject 4 mass: 88.0 kg.

Grahic Jump Location
Fig. 1

CamWalk at key stance positions. Springs in dashed lines provide no force at the instant shown.



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