Special Section Technical Briefs

Pneumatic Sleeve Orthosis for Lofstrand Crutches: Application of Soft Pneumatic FREE Actuator1

[+] Author and Article Information
Chenzhang Xiao, Ye L. Oo, Deen Farooq, Elizabeth T. Hsiao-Wecksler

Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign,
Champaign, IL 61820

Gaurav Singh, Girish Krishnan

Department of Industrial and Enterprise
Systems Engineering,
University of Illinois at Urbana-Champaign,
Champaign, IL 61820

DOI: 10.1115/1.4033249Manuscript received March 1, 2016; final manuscript received March 17, 2016; published online May 12, 2016. Assoc. Editor: William Durfee.

J. Med. Devices 10(2), 020959 (May 12, 2016) (2 pages) Paper No: MED-16-1177; doi: 10.1115/1.4033249 History: Received March 01, 2016; Revised March 17, 2016

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Grahic Jump Location
Fig. 1

(a) and (b) Prototype of pneumatic sleeve. (c) Demonstration of pneumatic sleeve not limiting forearm movement.

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Fig. 2

Model of pneumatic sleeve under (a) no pressure, and (b) actuation pressure of 30 psig

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Fig. 3

Experimental setup with 3D-printed shells, FREE actuator, air bladder, and pressure meter

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Fig. 4

(a) Overview of piston pump in tip of crutch. (b) Cross section view and air flow (into the accumulator) during pumping.

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Fig. 5

Reaction force per unit length versus actuation pressure in FREE actuator




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