TEAM BASS•Karthik Kumar•Sebastian Schillo•Ben Baker•Jessica Thompson•Johannes Ruf

Product Profile◦ Problem Definition◦ Background

Final Product◦ Concepts and Features◦ Components and

Design Changes◦ Fabrication◦ Materials◦ Validation/Risk

Assessment Improvements

◦ Large scale production◦ Recommendations

ME463 TEAM BASS FINAL PRESENTATION 25/1/2009

To design and construct a bariatric walker that will aid or assist those weak of strength or balance to walk in a safe and convenient manner.

Provide support to obese or elderlyCarry additional medical itemsEnsure safety

ME463 TEAM BASS FINAL PRESENTATION 35/1/2009

Primarily for elderly and obese users Hospitals and Nursing homes Walker use: 1.8m people – Disability

statistics survey – UCSF ReportRequirements:Light weight/easy to move around withBrakesNo slip/slide when stationaryIncreased protection against fallingProvisions to carry IV equipment

ME463 TEAM BASS FINAL PRESENTATION 45/1/2009

Product Profile◦ Problem Definition◦ Background

Final Product◦ Concepts and

Features◦ Components and

Design Changes◦ Fabrication◦ Materials◦ Validation/Risk

Assessment Improvements

◦ Large scale production◦ Recommendations

ME463 TEAM BASS FINAL PRESENTATION 55/1/2009

All aluminum frame

Ergonomic handle bars

“Push-to-Go” braking mechanism

Collapsible Entry from

seated position

ME463 TEAM BASS FINAL PRESENTATION 65/1/2009

Total Weight - ?? Expanded

volume – 36”X40”X27” (=0.637m3)

Height Range – 33” to 40”

Weight Capacity – 400lbm

ME463 TEAM BASS FINAL PRESENTATION 75/1/2009

ME463 TEAM BASS FINAL PRESENTATION 8

Collapsed Dimensions: 7”x27”x30” (Volume – 2.81ft3)

5/1/2009

Connection of square aluminum pipe segments◦ Double locking bi-fold hinges

not available◦ Cabinet hinges◦ Design change to inner sliding

link for locking secured with wingnut

ME463 TEAM BASS FINAL PRESENTATION 95/1/2009

Simple telescoping design Round-nose spring

plunger for quick and easy adjustment

Easy attachment to caster wheels

Pin connections set height

ME463 TEAM BASS FINAL PRESENTATION 105/1/2009

Seated Entry Comfortable and

convenient Self closing Door

Torsion Spring Hinges

Gate latch that locks automatically, flip to open

Weight reduction

ME463 TEAM BASS FINAL PRESENTATION 115/1/2009

ME463 TEAM BASS FINAL PRESENTATION 12

IV pole connection◦Quick clamp onto IV

pole◦Mounted to front of

walker, allows access through narrow passages

◦Visibility conserved

5/1/2009

ME463 TEAM BASS FINAL PRESENTATION 13

Tarp◦Looped around side

bars and connected with carabiner

◦Purpose to prevent or alleviate damage from falling

5/1/2009

ME463 TEAM BASS FINAL PRESENTATION 14

Handlebar◦ “Push-to-go” brakes provide

stability for patient while entering walker

◦ Bicycle shifter for prototype

5/1/2009

Rear braking◦ Fixed wheels◦ Piece manufactured for

mounting◦ Bicycle brakes with

reversed functionality

ME463 TEAM BASS FINAL PRESENTATION 155/1/2009

Product Profile◦ Problem Definition◦ Background

Final Product◦ Concepts and Features◦ Components and

Design Changes◦ Fabrication◦ Materials◦ Validation/Risk

Assessment Improvements

◦ Large scale production◦ Recommendations

ME463 TEAM BASS FINAL PRESENTATION 165/1/2009

All components were individually manufactured by team(with exception to general hardware and bike parts)

The following machinery were used: Band Saw End Mill Sander Thread tap Various hand tools

ME463 TEAM BASS FINAL PRESENTATION 175/1/2009

All aluminum frame◦ Side links◦ Sliding inserts◦ Doors◦ Legs◦ Front bars

Aluminum hingesBrass door hingesSteel L-Brackets, Corner Braces, nuts and

boltsCanvas tarp fall protectionMedical purpose polyurethane casters

ME463 TEAM BASS FINAL PRESENTATION 185/1/2009

Desired functionality Adjustable height Extremely compact

Functioning hand-brake

Dynamic side links

Easy maneuverabilityME463 TEAM BASS FINAL PRESENTATION 19

Realization◦ 33” to 40” height

range

◦ Compacts to 15% of original volume

◦ Spring returning hand-brake functions well

◦ Side links can be either flexible or rigid. Rotate through full 180°

◦ Caster wheels functioning smoothly, easy steering

5/1/2009

Desired functionality Fall

Protection, goal 400 lbs

ME463 TEAM BASS FINAL PRESENTATION 20

Realizationo Successfully

supported all members of team. Heaviest member is _ lbs.

o Expect to reach goal with some improved materials

Sebass pic

5/1/2009

Product Profile◦ Problem Definition◦ Background

Final Product◦ Concepts and Features◦ Components and

Design Changes◦ Fabrication◦ Materials◦ Validation/Risk

Assessment Improvements

◦ Large scale production

◦ Recommendations ME463 TEAM BASS FINAL PRESENTATION 215/1/2009

Custom designs for: Heavy duty lockable hinges

for side links. Removes mass and cost of sliding

links. Appropriately sprung door

hinge Ergonomic push pins

More easily adjustable Comfort features (Velcro pads

for side links) Modified wheelchair style brake

ME463 TEAM BASS FINAL PRESENTATION 225/1/2009

ME463 TEAM BASS FINAL PRESENTATION 23

Developed marketable product

Effectively accomplishes all functions determined

Cost estimated at $90 With some customized

components and mass production, weight goal + aesthetics would be accomplished. 5/1/2009

ME463 TEAM BASS FINAL PRESENTATION 245/1/2009