1) The document describes a design for a detachable shoe sole that allows the user to change the sole based on climate or occasion. This addresses the high cost and short lifespan of most shoes. 2) Key aspects of the design include easy attachment and detachment of the sole using a rail and clip system, support, durability, and versatility for different climates and uses. 3) Prototypes were created using thermoplastic polyurethane for the sole and water resistant leather for the upper. The design aims to be manufactured through casting or 3D printing.

1. Evan Peretti

2. • Shoes are often expensive and
most don’t seem to have a long
life if worn every day especially in
the north east climate. After doing
research and surveys I've
determined that the average life is
6-9 months before they are unable
to use them again or are just
thrown out. According to the
Bureau of Labor Statistics' 2016
the average house hold spends
$110 a month on footwear.
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We all have many shoes that are
designed to function for many different
situations and It is tedious and
sometimes annoying to constantly keep
changing shoes for different occasions.
So what I am designing is a shoe that
can be detached from its sole to either
just wear as a slipper or attach to
multiple different soles for what ever it
is that you need that day

4. Primary end users: People living in
areas with multiple climates a year
Secondary: any other person who might
want to have multiple options
Tertiary: Retailers, Manufactures,
suppliers, and shipping
Value to primary end user: receive a
comfortable, affordable, long lasting
shoe that the consumer can feel good
wearing.
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5. 5
Wearable after detached
Not wear able after detached
Singlepurpose
Muti-purpose

6. 6
Easily attach and detach both
components
Be able to attach and detach with 1 or no
hands
Provide proper ankle and foot support
Wearable in a variety of climates
Wearable after detached
No water seepage
Long lasting
OKALA: Manucaturing innovation,
Optimized for end of life, system
longevity
Lowell center: Healthy for
consumers, Economically
viable, Environmentally sound
These two ideation sketches
were the two that rated the
highest on my QFD and met
then the most of my
functional requirements

7. Tolerance constraints
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Some tolerances I had to look at was the rail system the enrased rails had to be about .10
inches smaller than then the slots to ensure a smooth tight slide. Another constraint that I
had was the pitch of the toe it needed more than 10 degrees and less then 20 or you
would trip over the front

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For my connections
and joints I used a
rail system and a
stomp and clip
system to ensure a
tight strong
connection while
also allowing it to
easily slip on and
off.

9. 9
Thermoplastic
polyurethane (TPU): This
is Moldable bendable
plastic which was perfect
for my soles so they can
bend with the movement
of the foot
Water resistant leather: I
used leather because it is
rugged and soft so it will
be resistant to the weather
but also comfortable
Yarn: I used yarn to
sew all my upper
parts together

10. Manufaturing
process
• designed these sloes to either be cast
molded or 3D printed with only 2 moving
parts so you only have to cast or print 2
parts to complete the sole.
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11. 11
Ease of assembly: I designed the upper and lower sole to detach and attach from one another
hands free by using a rail and clip on system almost like a ski boot and binding, you simply line
up the rails in the proper spot slide them together then stomp down clipping them together for a
more secure hold.
Ease of disassembly: Disassembly is just as simple as the assembly you simply put pressure
down on the bottom part of the sole lift up on your foot until the clip is released and just simply
slide your foot back.

12. B.O.M
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13. 13
Final
Drawings

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15. 15
Concept 1
Concept 2
Concept 3

16. Failed Proof of concept
My 2nd proof of concept failed because
the tolerances were way off and my
connections weren't fitting to getter
properly, but this failure proved to be
more beneficial then my other
concepts.

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18. Final Prototype
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If was to patent my detachable sole idea i would place it under a utility patent for the reasons it
is not obvious it is operable, practical, and beneficial to those living and an area with multi
climates and those looking to save money and foot wear. It also has multiple combinations of
features that are not obvious to one skilled in the art.