1. Soheb Hossain Product Design Portfolio
“When people talk about innovation in
this decade, they really mean design.”
— Bruce Nussbaum
SohebH93@hotmail.com
07505606065
uk.linkedin.com/in/sohebh93/
@SohebH93
coroflot.com/SohebH93/
3. Profile
I am a creative, driven and well-organised
Product Designer. I have a BSc degree in Product
Design Technology and am a graduate member
of the Institution of Engineering Designers. My
degree course involved work on rapid turnaround
projects with leading organisations such as
Jaguar and Omlet. These projects have given
me industry experience, which has enabled me
to develop my strong creative and analytical-
thinking skills, based on a broad understanding
of product design, CAD, usability, mechanical
engineering and physical principles. I work well
with all individuals, at all levels and from all
backgrounds, and can work collaboratively to
offer a positive contribution to a team.
i.
PROFILE
Software Packages
SolidWorks, Rhino, Autodesk Simulation
Mechanical, Algor Fempro, KeyShot, V-Ray,
Photoview 360, T-Splines, Working Model 2D,
Adobe Photoshop, InDesign, Illustrator, Flash,
Dreamweaver, Microsoft Office (Word, Excel,
PowerPoint) and Arduino.
4. Jaguar UK (Feb 2014)
BSc Work Placement Project
(IVNT)
Omlet (Feb 2013 - Mar 2013)
BSc Work Placement Project
(Eglu Shack)
ii.
EXPERIENCE
Sidhu Textile Co Ltd (Dec 2015 - Present)
Design Coordinator
Sainsburys Plc (Jan 2015 - Dec 2015)
Store Lead
Hull and East Yorkshire NHS Hospital/
Migraine Trust/IBST (Nov 2013 - May 2014)
BSc Dissertation
(MIE-TRAKR)
5. iii.
Profile [i.]
Experiences [ii.]
Contents [iii.]
MIE-TRAKR
Migraine
Management
[Pg. 1 - 16]
The IVNT
Lightweight Car
Seat
[Pg. 17 - 20]
The Eglu Shack
Omlet Domestic
Incubation
[Pg. 21 - 26]
The Autoquick
Braun Automatic
Citrus Juicer
[Pg. 27 - 33]
The Little-Big Bar
B&Q Garden
Lopping Shears
[Pg. 34 - 37]
TABLE OF CONTENTS
6. MIE-TRAKR
MIGRAINE MANAGEMENT
DEVICE
1.
Project
The dissertation for my BSc Studies was to design
and develop a migraine management device that
could help the sufferers of migraines, live with and
manage their condition.
End-User
Adults who suffer from migraines.
7. RESEARCH
PRIMARY
2.
My research began with finding sufferers of migraines, each from different
walks of life and compiling as much information from them as possible. I then
utilised desk research from existing studies and literature to back up and
explain these findings. Through both primary and desk research, I isolated
the most efficient and effective methods of treating migraines.
Kohinoor Akter, 34
Network Manager
“… petrified for the
health of the baby; I
was worried there will
be long lasting effects
on them…”
Josh Briars, 25
Professional BMX
“… feels like a hot spike
pushing from the back of
my head to my eye… ”
Dr. Fayyaz Ahmed
Consultant Neurologist
“… there are different
options for treatments, the
most effective being drugs,
but they come with strong
side-effects…”
9. DEVELOPMENT II
CONCEPT
4.
Pillow
in bagOff Pillow,
out of bag
THERMAL PILLOW
Memory
Foam Pillow
Comfort &
user-specified
head position
Heat/Cool
Pillow Cover
High Temperature
Medium Temperature
Low Temperature
Monitor: Time
On/Off
Controler
Rings inflate applying
just enough pressrue
for the user
PRESSURE
FEEDBACK
MASK
Feeds through
inflation
to rings
Skin Textures Changeable
Skins
Roll across
or Apply to
Cold pack
inside pocket
Finger goes here
Pocket
for cold
pack
Cold
Pack
Cold Pack
Cold Pack Pocket
COMPACTIBLE
THERAPY
ENVIRONMENT
#1
#2
#3
Vibrating
Motor
PULSATING
THERAPY
BALL
THERMAL
THERAPY
SLEEVE
10. DEVELOPMENT III
CONCEPT
5.
Cold Pack #1
Cold
Pack #2
Alternative
Cooling Pack
5 0 p
Coin
Sizing on
a generic
face
Cold Pack #2
Up
Monitor:
time, mode
& battery life
Down
Sonar Pulses
DUAL THERAPY
MASK
Mask & Remote
On/Off
Start
Dual
Therapy
Sonar
Therapy
Thermal
Therapy
Easy-carry
Zip Bag
Clip-locks
Therapy Glove
Collapsed
Slides in
and out
Folded Up
Flip-open Lid
Magnetically
assembles
together
Foldable and
Collapsable
KIT BOX #1
KIT BOX #2
KIT BOX #3
Thermal Patches
COLD THERAPY
MASK
11. 6.
DEVELOPMENT -TESTING
CONCEPT
Most of my end-users
were interested in
how a ‘sleep therapy
mask’ would work, so
I produced a mock up
that emulates some of
the effects, although
crudely. The pressure
of the tights emulated
the pressure mask, the
relief sounds produced
the sound therapy
component, while the
concealment of light
helped to desensitise
the user from light
exposure.
After narrowing down cold thermal therapy as one of the most
effective methods of treating migraines, I made a sleeve with
two cold-conductive metal plates attached to them. I asked
my user which orientation of the plates on the finger was
more comfortable apply to the eye.
Kohinoor Briars -
“I preferred the inside of
the finger, just felt more
natural. I was wondering
about if it would stay cold
for long and will it be cold
when I need to use it in an
emergency, I mean does it
have to stay in the fridge?”
12. DEVELOPMENT IV
CONCEPT
7.
The Kit
The App
In-use
The Migraine Management Kit
The Therapy Mask
Provides dual therapy (Sonar and Thermal).
Indicates to others that the user is suffering a migraine
(subtle exterior glow).
Emulates a recovery environment.
Desensitises light and sound (blinding-out and
noise-cancellation).
The Cold Sleeve
Cool thermal treatment for specified user-points.
Cushioned in conjunction with ‘Auto-Acupressure guide’
within the app (auto-acupressure and thermal therapy).
The Watch and App
Provides biofeedback on the user and their migraine.
Allows user to manage their own migraine diary.
Tracks use of other products from the kit automatically.
Automatically records data and graphically presents them.
The Modular Box
Collapsible, modular, portable and easy-to-carry kit.
Designed to fit at work desk, home, car glove-
compartment and bags.
Can be kept together or split to different locations.
13. DEVELOPMENT V
CONCEPT
8.
After further research, end-user interviews and advice from Dr.
Fayyaz Ahmed, I concluded that a kit that relieves the migraine
was not ethical for a design brief; as proving the results of
treatment is sensitive in the medical field. Instead I decided to
eliminate the root of the problem by managing migraines and
help prevent them from occurring in the first place. I began
designing a management device and used the Internet of Things
and Wearable Technology as inspiration.
‘….prevention is the best form of treatment.’
14. 9.
DEVELOPMENT VI
CONCEPT
Once I decided on producing a bio-sensing
watch that would monitor the variables
that are attributed to migraines, I needed
to decide on a form and aesthetic that
promotes calm, tranquillity and healing. It
was also necessary to research, prototype
and combine the required technologies.
I began with sketch modelling the form.
I also decided to use a ‘slap-band’ for the
brace so that it could be utilised by the user
on any extremity of their person.
15. 10.
DEVELOPMENT VII
CONCEPT
I deduced that the utilisation of a display
would be counter-intuitive to the function
of calming the user. User comments and
critical thinking concluded that a display with
various and complicated statistics would be
too complicated and stressful and could in
fact induce a migraine.
So as a result I decided to utilise soft and calm
light diodes to indicate healthy and harmful
levels of each bio-sensing variable. This will
indicate to the user when a migraine could
come on and what steps could be taken to
avoid one.
16. WORKINGS
MIE-TRAKR
11.
Migraines
Migraines are a complicated medical
condition with symptoms ranging from
intense visual auras, to a loss of cognitive
clarity. However migraines do not garner
the same empathy that other ‘serious’
health conditions receive. There are as
much as 610,000 sufferers in the UK
(The Migraine Trust, 2009). Currently
however there are little means to managing
stress, anxiety and the other triggers for
migraines.
MIE-TRAKR
The MIE-TRAKR is a migraine management
device that brings the effectiveness of
Medical Biofeedback to an easy-to-use
and unobtrusive piece of fashionable
technology.
It works by updating the user on certain bio
and environmental levels which can then be
processed to make adjustments and help
avoid triggers of potential migraines. The
Bio-levels measured are Skin Activity, Skin
Temperature, Sleep Quality, Body Hydration
and Pulse, along with the Light Intensity
sensor as the environmental gauge.
17. TESTING
MIE-TRAKR
12.
As the MIE-TRAKR works off of a theoretical concept that I isolated from
my primary and desk research, I had to find a way of proofing that
concept. I decided to use one of my end-users and test as many of the
proposed variables as possible and see if they did in fact have a direct
correlation with stress and thus potentially migraines.
I chose Mr. Callum Nicklin as he is an athletic individual, who was going
through a stressful time with his final year of university.
The test-rig was made with and coded on an Arduino and 3 sensors.
These were a light intensity module, pulse sensing module and
temperature sensor. He rated his stress out of ten and the spikes in each
module had a feint link with the rating.
18. FEEDBACK
THE MIGRAINE
13.
Matthew White
“…Honestly, I work on the computer for a long
stretch of time and I don’t take a break so I’ll
forget to drink water or something, and then I’ll get
a migraine later, but this device could remind me
to so that’s cool...”
“…I wasn’t so sure at first, a device that I carry
around and gives me live updates on my health,
sounds a bit like Star Trek to me but I’m liking it
now, especially how easy I can strap it on my wrist
or latch it on my bag...”
“… it’s sad because the cooling sleeve was
something that was just amazing and what I really
needed, but I get that a cooling sleeve won’t help
every other person so, but I think the device is
really neat, especially the live updating feature…”
Dr. Tim Cox
“… I did think 8 different sensors in a small
device would be over-ambitious … now
you’ve reduced that number down, the device
functionality seems more realistic now. But I
have to emphasis the great potential this little
device has in store…”
“…I do however wish to push the notion, I see
you are going for the live update feature, I
think if you could replace that with a continuous
update instead…”
22. LIGHTWEIGHT CAR SEAT
17.
Project
Involved in a four-week, rapid turnaround project to fit
the already designed driver environment for the C-X17
concept car. The design needed to represent Jaguar’s brand
heritage, embody luxury and comfort, ultra-lightweight and
package-optimised. The seat had to provide a sense-of-
occasion each time it is seen and used.
End-User
Drivers/owners of executive sports cars.
26. OMLET DOMESTIC
INCUBATION
21.
Project
Involved in an eight-week design project for
Omlet. I designed an all-in-one chicken coop and
brooder that educates the user on chicken and egg
rearing. The design needed to bring the properties
of farmland chicken/egg rearing, into the comforts
of a domestic suburbia and represent the brand
image. It needed to include several features such as
a humidifier, egg turner, coup, candler, brooder and
feeders. I presented to the Founder and the lead
designer at Omlet, the exploration of the design
process from sketch ideations, to CAD models and
assemblies, to a final model.
Client/End-User
Client - Omlet
End-user - Young Families
27. DEVELOPMENT AND MODELLING
First a full scale 3D sketch model was
constructed to explore the form and
size of the product.
We then moved on to reene the design in
smaller scale plastic modelling as well as
looking at details such as branding.
DEVELOPMENT AND MODELLING
First a full scale 3D sketch model was
constructed to explore the form and
size of the product.
We then moved on to reene the design in
smaller scale plastic modelling as well as
looking at details such as branding.
DEVELOPMENT AND MODELLING
First a full scale 3D sketch model was
constructed to explore the form and
size of the product.
We then moved on to reene the design in
smaller scale plastic modelling as well as
looking at details such as branding.
The na
laser cut
DEVELOPMENT AND MODELLING
DEVELOPMENT AND MODELLING
DEVELOPMENT AND MODELLING
First a full scale 3D sketch model was
constructed to explore the form and
size of the product.
We then moved on to reene the design in
The nal model was constructed using a mix of MDF and
laser cut acryllic. Sheet plastic was bent to create the all in
one shell, while other plastic parts were etched with the
omlet logo.
DEVELOPMENT AND MODELLING
The nal model was constructed using a mix o
laser cut acryllic. Sheet plastic was bent to cre
one shell, while other plastic parts were etche
omlet logo.
DEVELOPMENT AND MODELLING
The nal model was constructed using a mix of MDF and
laser cut acryllic. Sheet plastic was bent to create the all in
one shell, while other plastic parts were etched with the
omlet logo.
DEVELOPMENT AND MODELLING
Fabrication
SKETCH CONCEPTS Concept I
SKETCH CONCEPTS
Concept II
22.
IDEATION
THE INITIAL
28. 23.
IDEATION
THE INITIAL
?
Omlet was a young brand, who had already established a distinct
style and prides themselves for sustainability.
Through dissecting the brief, it was ascertained that the final
concept would have to bring together several products.
Fabrication of sketch models began after primary research into the
sizes of chickens at different stages in their infant life, studies on
the minimum dimensions for a sufficient coop area and package
optimising the internal structure.
30. Tilting Egg Turner
Can hold up to
12 Eggs
Simple Incubation
Unit
Humidifier
Candler
Timeline Indicator
Brooding Lamp
Refillable Food and
Water Feeder
Completely
Modular
System
Waste Tray
Brooding Coup
Can hold up to
8 four-week-old
Chicks
25.
ENGINEERING
THE
32. BRAUN AUTOMATIC
CITRUS JUICER
27.
Project Brief
Design a simple Citrus Juicer for the elderly,
which can be operated single-handed and does
the job, while also being unobtrusive in the
kitchen environment.
End-User
Elderly home owners.
33. 28.
DEVELOPMENT
THE
12.
Notes
Back and forth gears on the central shaft to
recreate the motion of a person’s hand on a juicer
Bevel gears allow the rotary motion to be
converted to vertical for the press to spin
Screw gear means the punch will follow the thread
downward with a massive torque to squeeze the
fruit down onto the press
Motor located at the bottom of the central shaft
with an input power of 200W, an angular velocity
of 10RPM and a torque of 20N/m
CAD
INITIAL CONCEPT
WORKING MODEL
CONCEPT III
Analysis on the Concept I/ Working Model
In this case holding the orange in place could be a
little fiddly. And when it comes to gravity it would
be the best if the juice comes down with the gravity
flow. Plus after the working prototype we realized
that the screw itself can move up and down and
the gear train can be fixed in place. It just screws in
that slider (which is also fixed ) so in order to move
in which is the linear motion it has to rotate to
screw in the thing, hence providing both linear and
rotatory motion.
13.
RACK & PINION
CONCEPT I
Concepts usually based on how only one hand could be used to squeeze where
the force later could be considered to be coming from the motor.
For some of the concepts, looking if the force could be applied from a horizontal
angle instead of coming from top or bottom vertically. But with some experi-
menting realizing that the juice should fall in a natural manner as in with gravity,
so vertical motion could be better.
The first concept on the top left is like where the orange is stationary and the two
sides come and squishes the orange, so the juice just falls by gravity. Again the
rack and pinion mechanism could be used for this one. So as the motor spins the
pinion would move on the rack going forward and as it spins in the other direc-
tion, goes backwards.
The concept above consist of two racks and a pinion going forward
to push into the orange and squeeze, where the push thing would be
connected to back and forth gears to provide the rotatory motion
but with the back and forth the rotation would be in two directions
as they half the teeth on each of the two parallel gears. With this
concept the orange needs to be fixed (which is iffy) on the other end
and the positive comes in and squeeze.
Juice Dish
Press Pivot
Pivot
Gear
Orange rotates
and presses
into press
Motor
Orange
Press
(Stationary)
Juice
Dish
Archimedes’
Screw
Orange Press
rotates in both
directions
Rack
& Pinion
Back
& Forth
Gears
Archimedes’
Screw
Thread
Orange
Rotation
Orange
Corkscrews
onto the
stand
Rack & Pinion
drives the orange
towards the press
Rack &
Forth Gears
Fruit
Press
Motors
Rack
Gears
Pinion
Gears
9.
Ideation sketching for mechanisms
and testing with working sketch
models
34. SPUR GEARS FOS
FINAL CALCULATIONS:So after calculating a gear train value and the
specifying the spur gear variables such as the
number of teeth, diameter and working torque
and tooth stress on each gear, we were able to
then calculate the factor of safety.
It was high; however, through FEA we can
pinpoint the weak point with a lower yielding
material and alter that through CAD as the
stress value we calculated was the tooth stress
value and not the Von Mises stress. So the
stress on the base of the gears was not consid-
ered. Hopefully through iterating, we can bring
the Factor of Safety within the 3 to 4 threshold
of success.
BEVEL GEARS
FINAL CALCULATIONS:
N₄
N₅
Above is our original configuration, but we decided against
the double-action as it would require higher torque and the
actual implementation of it would
constrain the potential for design of the outer casing
later. So to the right is our final configuration.
Finding e?
e= RPM out
RPM in
rpm out from primary research = 60
rpm in = the rpm of the motor you require,
assume a number
The following pitch diameters were made
from assumptions.
N₄
N₅
Motor
19.
29.
DEVELOPMENT
THE
MOTOR SELECTION:
24.
Basic Flowchart of Archimedes Screw Concept
Start
Place on
Goblet
Prepare
Orange
Is Orange
Cut?
Motor Turns
Pinion Turns
Gear Chain
Turns
Screw Turns
Juice is Extracted
Juice Filters
Down
Is Orange
Empty?
Slice Orange in
half
Switch On
Gear Turns
Screw Moves
Down
Macerator Turns
Motor Reverses
Remove Orange
Skin
Motor Turns
Pinion Turns
Gear Turns
Gear Chain
Turns
Screw Turns
Screw Moves Up
Motor Re-
Reverses
Motor Reverses
Motor Turns
Gear Chain
Turns
Screw Turns
Pinion Turns
Gear Turns
Screw Moves Up
Switch Off
End
BEVEL GEAR STRESS
FINAL CALCULATIONS:
OMRON 2SMPP-02
SENSOR SELECTION:
After comparing several sensors, we decided that
the following pressure sensor would be most
appropriate for our mechanism. The specifica-
tions and information regarding the sensor are
as follows (these were taken from the company
website).
MEMS Gauge Pressure Sensor 2SMPP-02
Features: Small Size and Low Power Consump-
tion
Dimensions: 6.1 × 4.7 × 8.2 mm (L × W × H)
Characteristics: Superior electrical characteris-
tics to capacitive type pressure sensors. Also Low
Temperature Influence
Offset voltage: -2.5±4 mV
Span voltage: 31.0±3.1 mV
Power consumption: 0.2 mW
Span: ±1.0%FS
Offset: ±3.0%FS
Type of pressure: Gauge pressure
Sensing method: Piezoresistance
Pressure medium: Air
Driving method: Constant current drive
Drive current: 100 µA DC
Pressure range: 0 to 37 kPa
Max. allowable pressure: 53 kPa
Max. drive current: 130 µA DC
Weight: 0.17 g
Ambient operating temp. range: 0 to 50°C
Ambient operating humidity range: 15% to 95%
Ambient storage temp. range: −30 to 85°C
Ambient storage humidity range: 10% to 95%
http://www.omron.com/ecb/products/pdf/en-2smpp-02.pdf
25.
After several iterations of gear trains, with
different calculations and variables, I was
able to define the gear specifications and
the motor within a theoretically working
configuration.
The theoretical configuration then required
adjustments after being bought into
SolidWorks.
35. 30.
DEVELOPMENT
THE
PUNCH BODY
FINAL FEA ANALYSIS:
Tutor: Ramin Amali
Module: Mechanical
Design Simulation
Module Code: UFME-
Design Scenario 1
Nominal Force: 60N
Force Vector: +y
Load Case: 1 of 1
Load Case Description: Load Case Description
Maximum Displacement Value: 0.00413893mm
Minimum Displacement Value: 0mm
Maximum Stress: 6.09968 MPa
Minimum Stress: 0 MPa
Material: AISI 316 Stainless Steel
Yield Strength: 240 MPa
FOS: 240
6.0968 = 40.98575663
Conclusions: After the mechanical simulation and analysis of the main Punch component, I
found that the FOS was 10 times more than the required 3 to 4 range. This is a lower than the
other components, but still in its own right, considerable high in comparison to the required
range. Adding aesthetic surface features and making it more resolved in a semantic sense
would reduce this FOS, however, a fancy surface aesthetic is not in keeping with the ‘Form-Fol-
lows -Function’ ideology that Braun tries to embody in their designs. Hollowing out the com-
ponent would be a more appropriate course of action for reducing the FOS. Unlike the other
components, less materials being used in the manufacture of this component will not require
more processes, and less wasted material, instead, injection moulding this
component, may produce high start-up costs, but in the long run -which this product is in-
tended for, considering how little Braun have changed their juicer design- will eventually break
even the costing’s saved from using less raw material per unit.
60.
CAD CONCEPT
INITIAL PHILIPS
Tutor: Ramin Amali
Module: Mechanical
Design Simulation
Module Code: UFME-
This was my initial CAD Concepts for the exterior
body and housing of the mechanical juicer
components. The focus on this concepts was form,
rather than the applicablility and feasibility as a
juicer housing. The aesthetic form of the concept
is very indicitive of the Philips design ethos, of
subtle, natural and organic curviture and looked
very similar to the Philips Viva Collection Airfryer
(HD9220/20) and the Philips Senseo Coffee Pod
system (HD7814/60). However, such features as the
juice guard for the power screw and the rest of the
internals was very crude. Furthermore, the ground
clearance of the poureer was so small, that it could
only pour into a 5cm cup -which after a brief bit
of research- I found was more or less non-existant.
Also, the access of the orange
reamer would have required a removal of the
entire top body and then the front door, which
for an elderly person (the target end-user) was
completely innapropriate. Other such constituants
of the Assembly were not easily manufacturable,
and the internal components were not fastened to
the main body, with little considerations for this
made, which is contrary to the main purpose of the
excercise. I made recvisions to all of this in my final
CAD and feel that the appropriate
considerations have been utilised and answered.
My New design is also concentrated on the
‘form-follows-function’ design ethos of Braun,
rather than the aethetic form of Philips.
48.
I then put each component through stress and displacement
analysis’ to ensure they would not fail under the calculated
nominal stresses.
After defining the faulting areas, I redesigned them to conform.
After trying to emulate the Philips style comprised in their
kitchen utilities range, I determined that too many compromises
were required to include the automated system with the organic
form. So, instead I decided to emulate Braun’s symmetrical
and simple forms.
37. 32.
IN-CONTEXT
Take lid off from cup.
Remove cup, lid
and then orange.
The juicer will automatically
activate once the cup is in place
and will stop after the second
pressure sensor is activated.
Place cup onto pressure
activated base, through the
swing doors.
Place sliced orange onto reamer.
Then pour and enjoy.
39. B&Q GARDEN
LOPPING SHEARS
34.
Project Brief
Revamp the B&Q Telescopic Anvil Lopper TBL322
but for operation for the elderly. The design should
be able to:
Apply an output force of 4120N.
Cut to a diameter of 18mm.
End-User
Elderly gardeners and home owners.
40. IDEATION
THE INITIAL
Proposed Configuration
Isolating the 3
classes of leversLoad
Fulcrum
Effort
Load
Effort
Fulcrum
Load
EffortFulcrum
FIXED
-FX
-FY
FIXED
-FX
FX
FY
FIXED
FX
FIXED
FX
FY
-FX
-FY
Free-Body Diagram
Initial Sketches
Concept 1:
The Clamp
Concept 2:
Tangent Linkage
Concept 3:
X-Scissor
Concept 4:
Xros Link
35.
4120N
After isolating which type of lever would most efficiently
perform the task of lopping branches and twigs, I had to
calculate and define the dimensions, configuration and
linkages that allows for both the 410N output force and an
18mm cutting diameter.
41. DEVELOPMENT
THE
As a tool to help calculate and
visualise the different angular and
dimensioning variables, I used
WorkingModel 2D. Through desk
research it was defined that 55N was
the minimal force that an elderly
person could exert onto the handle
of the shears.
After I composed a functional CAD Model Assembly in SolidWorks, I
used the FEA package Autodesk Simulation Mechanical to simulate
likely-nominal and worst-case scenarios on each component.
Load Case: 1 of 1
Max. Value: 9328.75 N/(mm^2)
Min. Value: 11.7631 N/(mm^2)
Load Case: 1 of 1
Max. Value: 1.26345 mm
Min. Value: 0 mm
Von Mises
Stress
Scenario
Parameters
Displacement
36.
42. 37.
THE LITTLE BIG BAR
Blade Arm
Handle Arm
Rubber
Handle
This design optimises the minimum nominal force an elderly person
can exert to transfer to strong enough shearing force for cutting,
whilst also adhering to the average weight an elderly person could
carry. This was designed through iterations and development of the
linkages, configurations and proportions and stress/weight analysis.
Female
Link
Bracket
Male Link
Bracket
Main
Bolts
Blade
Bolts
Nuts Bolts
Rubber
Spacer
LITTLE
BIGBAR
THE
