andrew rosenberg university of rhode island bme 281 first presentation
TRANSCRIPT
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Andrew RosenbergUniversity of Rhode IslandBME 281 First Presentation
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How Many People Need a Wheelchair?
An estimated 100 million people worldwide
Up to 6% of the population in developing countries
That number is much higher in war-torn nations•20% of the population in Angola (12 million people)
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Handicapped Accessible?
America Tanzania
- Accessible Doorways
- Paved Roads
- Handicapped Accessible Buses, Taxis, & Cars
- Accessible Ramps
- Narrow Doorways
- Bumpy & Muddy Roads
- Long Distances to Destinations
- No Handicapped Accessible Transportation
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How Does the Conventional Push-rim Wheelchair Work?
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How Does the Lever Propelled Wheelchair Work?The Leveraged Freedom Chair® (LFC) by Global Research Innovation & Technology (GRIT)
- Created by Amos Winter, PhD et al. (MIT’s Mobility Lab)
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How is it Made?
The Leveraged Freedom Chair® is Made From Simple Bicycle Parts•Frame (Aluminum)•2- Chain & Chain ring•2- Tire with Conventional Push rim•2- Axles (Aluminum & Water Pipe)•2- Levers (Aluminum)
This wheelchair is made with bicycle parts because:•They are inexpensive and easy to find•Local bicycle mechanics with limited knowledge can fix any problem with the chair
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Alternatives
Hand-Powered Tricycle Conventional Chair All-Terrain Chair
$1,525.74 $1,640.56 $2,519.00
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ResultsLever Propelled Wheelchair Compared to the Conventional Wheelchair
Speed:•76% faster (on Tarmac)•34% faster (on Pavement)
51% more Torque•Easier to use on hills and in mud
41% more Efficient•Delays fatigue•Improves posture•Prevents upper limb joint pain
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Cost
Leveraged Freedom Chair® - $150•MIT funded research and design with production through Continuum and Pinnacle Industries
Donations help send new chairs around the world
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Today (2013)• Pinnacle Industries in India produce 500 Leveraged Freedom
Chairs a month
• Over thousands of wheelchairs since the summer of 2011 have been produced and given to undeveloped countries
• Other Companies such as NuDrive and Quantum Runner have been producing similar versions of the Leveraged Freedom Chair®
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Future Outlook
GRIT will release a developed world Leveraged Freedom Chair® version in 2014•Official price not yet released •For every 1st world chair purchased 3 undeveloped world chairs will be donated
• The GRIT team is constantly looking for inexpensive and readily available materials to bring down the cost of each chair.
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References
1. Ahmad Rifai Sarraj, Ahmad R., and Raphael Massarelli. "Design History and Advantages of a New Lever-Propelled Wheelchair Prototype." Intechopen.com. 13 May 2013. 15 Oct. 2013
2. "Leveraged Freedom Chair (LFC) / India." D-Lab. Massachusetts Institute of Technology, n.d. Web. 17 Oct. 2013. Blake G, Bly RW. The elements of technical writing. Longman, 1993.
3. Winter, A., et al. (2010). LEVERAGED FREEDOM CHAIR: A Wheelchair Designed for Developing Countries. In Rehabilitation: Mobility, Exercise and Sports: 4th International State-of-the-Art Congress (Vol. 26, p. 54). IOS Press, Incorporated.
4. Van der Woude, et al. (1993). Physiological evaluation of a newly designed lever mechanism for wheelchairs. Journal of medical engineering & technology, 17(6), 232-240.
5. <www.quantumrunner.com>6. <www.inhabitat.com>7. <www.mansionathletics.com>8. <www.nymedicals.com>9. <www.spinlife.com>10. <www.nu-drive.com>11. <www.innovationsupplychain.com>12. <www.wheelchairfoundation.org>