PSU / Keen MobilityPSU / Keen Mobility

Expandable WheelchairExpandable WheelchairFinal ReportFinal Report

Sponsor: Sponsor:

Industry Advisor:Industry Advisor:

Facility Advisor:Facility Advisor:

Team:Team:

Keen MobilityKeen MobilityRick KleinRick Klein

Faryar EtesamiFaryar Etesami

Meagan PischelMeagan PischelRobb SparksRobb SparksJoshua HatchJoshua Hatch

Aleksey SynkovAleksey Synkov

Spring, 2005

PSU / Keen MobilityPSU / Keen Mobility

Mission StatementMission Statement

Develop a low-cost Develop a low-cost manual manual

wheelchair with wheelchair with adjustable width adjustable width

and depth for and depth for skilled care skilled care facilities.facilities.

PSU / Keen MobilityPSU / Keen Mobility

Need for Expandable Need for Expandable WheelchairWheelchair

Reduce size of chair Reduce size of chair fleet in nursing fleet in nursing homeshomes

Reduce wide (20”) Reduce wide (20”) chair rentals chair rentals

Free up Medicare Free up Medicare money for other money for other patient needspatient needs

Provide a better Provide a better fitting chair to fitting chair to patients patients

PSU / Keen MobilityPSU / Keen Mobility

Main Design ObjectivesMain Design Objectives

Adjust width 16” to 20”

Adjust depth 16” to 18”

Increase chair capacity to 300 lbs

Allow quick, tool free adjustment

PSU / Keen MobilityPSU / Keen Mobility

Additional RequirementsAdditional Requirements Allow use of normal Allow use of normal

doorwaysdoorways Ability to fold instantlyAbility to fold instantly Standard service lifeStandard service life Easy maintenanceEasy maintenance Manageable chair Manageable chair

weightweight SafetySafety ReliabilityReliability

PSU / Keen MobilityPSU / Keen Mobility

Final DesignFinal Design

Crossbar design allows wheelchair to foldCrossbar design allows wheelchair to fold

Standard Adult Wheelchair Folded

pinned

attached

PSU / Keen MobilityPSU / Keen Mobility

Final DesignFinal Design

DoubleCrossbarfor addedweightcapacity

WidthAdjust

PSU / Keen MobilityPSU / Keen Mobility

Final DesignFinal Design

Handle Re-designed for Depth Adjustment

Original Design

Re-design

Fixed

Sliding

PSU / Keen MobilityPSU / Keen Mobility

AnalysisAnalysisFinite Element Analysis (FEA) for Handle

F

PSU / Keen MobilityPSU / Keen Mobility

AnalysisAnalysis

Yield Strength = 57 kpsimax. stress = 30 kpsi

FOS = 1.9

Safe for designed load

FEA Result

max

PSU / Keen MobilityPSU / Keen Mobility

TestingTesting

Broken into quantitative and Broken into quantitative and qualitative characteristicsqualitative characteristics

Width and depth adjustability meet Width and depth adjustability meet project requirementsproject requirements

Width adjusts in less than 3 minutes, Width adjusts in less than 3 minutes, depth in less than 1 minutedepth in less than 1 minute

Chair still folds easilyChair still folds easily

PSU / Keen MobilityPSU / Keen Mobility

PatentingPatenting

Grant funds Grant funds available for available for patentingpatenting

Draft patent Draft patent application sent to application sent to lawyerlawyer

R1"

R1 1/2"

1 3/4"

4 5/16"

4 7/16"

7"

2 11/16"2"

7/8"

13 3/16"

1/4"

SolidWorks Student License

Academic Use Only

PSU / Keen MobilityPSU / Keen Mobility

Conclusions and Conclusions and RecommendationsRecommendations

The wheelchair meets all main The wheelchair meets all main design objectives and the majority of design objectives and the majority of other PDS requirementsother PDS requirements

Only aesthetics need serious helpOnly aesthetics need serious help Some areas for refinement were Some areas for refinement were

identifiedidentified

PSU / Keen MobilityPSU / Keen Mobility

Special ThanksSpecial Thanks

Rick, Jerry, Brandon and entire Keen Rick, Jerry, Brandon and entire Keen Mobility TeamMobility Team

Professor EtesamiProfessor Etesami Vancouver Skilled Care Facility Vancouver Skilled Care Facility

nurses and staffnurses and staff