ME 4182 Mid Term Presentation
Team Moondogs
October 2, 2006
From left: Rahul Kirtikar, Chris Sampson, Chris Culver, Mike Widerquist, Elias Krauklis
http://www.prism.gatech.edu/~mefach21
Objectives
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Problem Statement
Design Partition
Task Assignments and Project Plan
Current Solutions
Conceptual Designs
Evaluation Matrix and Design Selection
Future Plans
Problem Statement
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A typical trash bag holds about 13 gallons,
a lot of which is empty space
For the average family, this equates to
taking out the trash once or twice per day
The most viable solution is to compact the
trash and minimize the empty space
Current automatic trash compactors exist
but cost over $400 and require installation
Problem Statement
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A manual trash compactor can perform the same duty
without the high cost and permanent fixture
A manual trash compactor will reduce the frequency of
replacing the trash bag by at least half, per day
Trash can should be relative in size to a typical kitchen
trash can of 13”x10”x30”
It should also be aesthetically pleasing and easy to
operate
Design Partition
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Trash Canister
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Trash Container
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Responsible for sustaining the unit that holds the trash
Square, circular, and rectangular canisters
The actual unit that holds the trash
Trash bags, separate canisters, and plastic linings
Trash Enclosure
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Encloses the trash into the trash canister from the visual
public
Hinged lids, removable lids, pull-out systems, and flaps
Design Partition
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Trash Compactor
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Two major parts of this assembly must include a compaction
plate and a device that moves the compaction plate into the
trash
A circular or rectangular plate for the compaction surface, as
well as a hydraulic lift, a ratchet jack system, a crank system, a
scissor jack, and an auger
Movements can come from the top to bottom of the canister,
from the bottom to top of the canister, or from the walls of
the canister
Task Assignment
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Chris Sampson
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Team leader
Lead weekly reports
Coordinate and mediate group
meetings
Rahul Kirtikar
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Website manager
Maintenance of deliverables
CAD
Michael Widerquist
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Construction manager
Purchasing and fabrication of
design parts
Part drawings
Chris Culver
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Construction manager
Purchasing and fabrication of
design parts
Prototype development
Elias Krauklis
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Patent research
Engineering analysis
Material acquisition
Project Plan
Project Plan
Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8 Week 9 Week 10 Week 11 Week 12 Week 13 Week 14 Week 15 Week 16
August
September
October
November
December
23
28
6
13
18
25
2
9
16
23
30
6
13
20
27
6
Deliverable:
Team Selection
Project Bids
Project Selection
Problem Statement
Website Maintenance
Conceptual Design
Design Parition
Project Plan
Task Assignments
Patent/Product Search
Selection Analysis
Midterm Presentation
Post Midterm Review
Layout Drawings
Recess
Engineering Analysis
Part Drawings
Prototype Review/Construction
Final Report
Final Presentation
Posterboard Display
Final Term Checklist
Peer Evaluations
CC- Chris Culver
RK- Rahul Kirtikar
EK- Eli Krauklis
CS- Chris Sampson
MW- Mike Widerquist
All
All
All
CS, RK
RK
All
CS
CC, MW
RK
EK
All
All
All
CC, MW, RK
All
CS, EK
CC, MW
All
CS, EK
CC, MW
RK
All
All
Current Solutions:
“Linkage Manual Trash Compactor”
Patent # 6,851,357 Feb. 8th, 2005
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Inventor: Rudolph Martorella
Utilizes a coupling arm (30)
connected to a lever arm (26) which
is connected to the plunging arm
(36)
The plunging arm lowers the
compression plate (50) and
compress the garbage
The container is a slideable tray
which allows for concealment
Current Solutions:
“Rack and Pinion Manual Trash Compactor”
Patent # 5,619,915 April 15th, 1997
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Inventor: William E. Wagner
Includes a trash bin that is mounted
to a portable platform
The trash bin is then connected to a
compaction plate that is held
together by a rack and pinion gear
A drive wheel is connected to the
gearing to allow for lowering of the
compression plate
A compression spring is used to
return compression plate to original
position
Drain holes are contained on the
bottom of the portable platform
for use when cleaning
Current Solutions :
Automatic Trash Compactor
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Uses a mechanically
driven piston to crush
trash
Can apply large
amount of compacting
force
Expensive : approx.
$400
Current Solutions :
“The Bettermaid Compactor”
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Produced by Bettermaid
Compactors Inc.
Incorporates the use of a scissor
mechanism within a refuse bin
Allows for application of up to 400
lbs force of compaction
Cost is $129.99
Compaction ratio is around 2:1 (by
inspection)
Endorsed by Canadian Heavy
Weight Boxing Champion Donovan
"Razor" Ruddock
Conceptual Designs:
Grinder Design
Conceptual Designs:
Side Trash Compactor
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The trash lid has to be removed
to lift the side panel out from in
front of the compaction plate
Once the side panel is removed
the lid can be replaced and the
compaction can begin
The compaction in this design
has the ability to be very strong
since a foot mechanism or a long
hand crank can be placed one
foot off the ground
The side panel may not be
needed if a trash bag could be
used in this design
Conceptual Designs:
Auger Design
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Auger with grooves reversed to
cause compaction instead of
extrusion
Trash is placed into canister through
lid opening
With an adequate amount of trash
the auger is rotated which causes
compaction
Spring Loaded plate is then released
to allow waste to fall into canister
Auger Crank
Lid
Release Point
Canister
Conceptual Designs:
Foot Pedal Design
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First, compacts the trash
by placing the lid on the
container
Then, a foot pump
motion lifts an inner
trash container straight
up onto a compacting
plate stabilized by ones
hand
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Conceptual Designs:
Hydraulic Lift and Compaction
Design
Hydraulic bottle jack attached
to base of outer can
Easily operated by a foot
pedal
Capable of applying
hundreds of pounds of force
Upper lid is retracted into the
trash can to compress the
trash as a mechanism of the
hydraulic jack.
Hydraulic Lift and
Compaction Design
Conceptual Designs:
Hydraulic Bottle Jack Design
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Inverted hydraulic Bottle Jack
attached to inside of lid
Easy to operate by pumping
the lever to extend the jack
arm
Capable of applying several
thousand pounds of force
Easy to retract the arm by a
turn of the lever to release
hydraulic pressure
Side removal of trash bags
Retracted Bottle Jack
Pair-wise Comparison Matrix
Accounts for relative importance of each design aspect
Siz
e
Ae
sth
eti
cs
Us
ab
ility
Po
rta
bili
ty
Cle
an
line
ss
Ro
bu
stn
es
Sa
s
fet
y
Co
st
an
dP
rod
u
cib
ili
We
1
1
1
0
1
1
1
1
0
1
8
0
1
1
0
0
1
0
1
0
1
5
0
0
1
0
0
1
0
1
0
1
4
0
0
0
0
0
0
0
0
0
1
1
t
i gh
rba
ge
Vo
lu
Ga
Garbage Volume Reduction
Weight
Size
Aesthetics
Usability
Portability
Cleanliness
Robustness
Safety
Cost and Producibility
Equalizer Point
FINAL WEIGHT
ty
me
Re
du
ctio
n

1
1
1
1
1
1
1
1
0
1
9
0
1
1
1
0
0
0
1
0
1
5
0
0
0
1
0
1
0
1
0
1
4
0
1
1
1
0
1
1
1
0
1
7
0
0
0
1
0
0
0
0
0
1
2
1
1
1
1
1
1
1
1
1
1
10
Im
po
r ta
nc
AU
eW
GE
eig
R
ht
GR
IN
DE
R
FO
OT
PE
DA
SID
LD
EC
ES
OM
IG
N
PR
DU
ES
AL
SIO
CO
N
MP
OV
R
ER
ES
HE
S IO
A
N
D
BE
C
TT
OM
ER
PR
MA
ES
AU
ID
SIO
TO
N
MA
TIC
TR
AS
H
CO
MP
AC
TO
R
Evaluation Matrix
Garbage Volume Reduction
Weight
Size
Aesthetics
Usability
Portability
Cleanliness
Robustness
Safety
Cost and Producibility
TOTAL
Normalized Total
8
5
4
1
9
5
4
7
2
10
3
1
4
3
4
3
2
5
1
3
3
2
3
3
5
1
3
5
3
2
4
3
5
4
4
4
4
2
3
3
4
4
4
3
3
1
4
4
4
5
2
4
3
1
3
3
4
1
1
1
4
5
4
4
4
3
3
4
3
3
2
4
2
5
4
1
5
4
4
5
5
5
1
2
3
1
2
5
3
1
134 148 182 117 175 209 191 182
0.64 0.71 0.87 0.56 0.84 1.00 0.91 0.87
Design Selection :
Hydraulic Foot Pedal
•100 lbf input force
from the leg
•400 lbf output force
from the hydraulic
system
•Telescope elevates
1.5 inches per pump
•Total of 7 to 10
pumps for completion
Future Plans
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Need to research the mechanics of a check valve
as well as oil reservoir system
Determine placement and method of pressure
release valve
Questions?
Suggestions?