?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F8182%2F&rft.title=EVALUATION+OF+TITANIUM+ULTRALIGHT+MANUAL+WHEELCHAIRS+USING+ANSI%2FRESNA+STANDARDS&rft.creator=Liu%2C+Hsin+Yi&rft.description=A+series+of+commercially+available+titanium+ultralight+wheelchairs+were+tested+using+ANSI%2FRESNA+testing+procedures%2C+and+their+durability+was+compared+with+previously+tested+aluminum+ultralight+wheelchairs+and+light-weight+wheelchairs.+Three+of+each+of+the+following+titanium+wheelchairs+were+tested%3A+Invacare-TopEnd%2C+Invacare-A4%2C+Quickie-Ti%2C+and+TiLite-ZRA.+The+Quickie-Ti+wheelchairs+had+the+most+forward+and+rearward+center+of+gravity+adjustability.+All+of+the+titanium+wheelchairs+passed+the+forward+braking+effectiveness+test%2C+but+two+chairs+of+each+model+tipped+backward+before+the+platform+inclining+to+7+degree+in+the+rearward+braking+effectiveness+test.+All+titanium+wheelchairs+passed+the+impact+strength+tests%2C+but+two+failed+in+the+static+strength+tests%3A+two+Invacare-TopEnd+wheelchairs+and+one+Invacare-A4+wheelchair+failed+due+to+deformation+of+the+armrest+mounting+plates%2C+and+the+handgrips+of+the+TiLite-ZRA+wheelchairs+slid+off+the+push+handles.+Two+Invacare-A4+and+one+Invacare-TopEnd+successfully+completed+the+double+drum+and+curb+drop+tests%2C+but+the+remaining+9+wheelchairs+failed+prematurely.+No+significant+differences+were+found+in+the+number+of+the+equivalent+cycles+or+the+value+among+the+four+models.+The+titanium+ultralight+wheelchairs+had+less+equivalent+cycles+and+value+than+the+aluminum+ultralight+wheelchairs+that+were+tested+in+a+previous+study.+The+failure+modes+in+the+static+strength+tests+and+the+fatigue+tests+were+consistent+within+the+model%2C+and+revealed+important+design+issues+for+each+model.+Our+results+suggest+that+manufacturers+need+to+perform+more+careful+analyses+before+commercializing+new+products.&rft.date=2008-09-08&rft.type=University+of+Pittsburgh+ETD&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F8182%2F1%2FThesis_Hsinyi_Liu_EVALUATION_OF_TITANIUM_ULTRALIGHT_MANUAL_WHEELCHAIRS_USING_ANSIRESNA_STANDARDS.pdf&rft.identifier=++Liu%2C+Hsin+Yi++(2008)+EVALUATION+OF+TITANIUM+ULTRALIGHT+MANUAL+WHEELCHAIRS+USING+ANSI%2FRESNA+STANDARDS.++Master's+Thesis%2C+University+of+Pittsburgh.++++(Unpublished)++