1. Feet For All
2nd Quarterly Deliverables
Kevin Fontenot, Hayden Slack, Charles
Sprague, Vladislav Voziyonov
1/26/2013

2. Quarterly Deliverables
• Obtain the Niagara Foot
• Prototype the ankle
• Test the ankle and foot assembly per ISO 10328
• Test the range of motion

3. Niagara Foot
• Difficulty obtaining
• Made our own
o SolidWorks
o Water Jet cutter

4. Prototyping
• Materials and Tools
• How
• Parts and Assembly
• Time

5. Materials and Tools
• Materials
o 3x12x12 polyethylene sheet
• Tools
o Milling Machine
• ½ “ and ¾ “ straight routing
bit
o Drill
• ¼ “ bit
o Wood Saw

6. How
• Two 3” cubes
• Laid out the basic
shape
• Brought the pieces to
size
• Cut the peg and
socket

7. Assembly and Parts
• Assembly • Parts
o 7/16” bolt goes through the top o Ankle top
of the foot o Ankle bottom
o Bushing and washer are o 7/16” bolt, washer, and nut
placed between the ankle top o Bushing and washer
and bottom
o Foot
o Tighten the nut to hold the
assembly together

8. Time
• Foot
o 8 minutes
• Ankle
o 4-5 hours

9. The Prototype

10. Testing
• ISO 10328
• Used free weights
instead of Tinius Olsen
• Feasibility test

11. Shriner’s Immersion
• Industry standard
materials and
components
• Manufacturing
procedures
• Design
critique/suggestions

12. Industry Standard
Components
• Received 4 distributors
manuals
• Saw size and shape of
components
• Primarily titanium

13. Lifespan of Prosthetics
• Hard to put a timeline
on them
• Not always treated with
the best care
• Not wearing shoes is a
major cause for
damage

14. Prosthetics Market
• 65+ w/ diabetes
• More worried about a
leg to stand on

15. Technology
• 3rd world wants the
newest and best
• Delivered as a
donation to a
prosthetist
• “first come first serve”

16. Ankle Critique
• Design is very simple
• Lateral flexion is
unwanted
• Polyethylene is not a
good choice of
material

17. Suggestions
• Lock the parts so that
the ankle functions as
one unit
• Materials
o Titanium
o Polyurethane

18. Range of Motion
• Generally done by a
prosthetist
• Proposed method
unlikely to be used
• “eye-ball” tested
o Parallel bars
o Watch them walk