Wheelchair with lever drivetrain

A manually powered wheelchair includes a first lever associated with a first rear wheel and demountably coupled to a first drivetrain, the first lever having a first brake thereon. The wheelchair also includes a second lever associated with a second rear wheel and demountably coupled to a second dri...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	O'HANLEY HARRISON F, RULEMAN NYDIA, BOLLINI MARIO A, JONES GWYNDAF M, JUDGE BENJAMIN, WINTER, V AMOS G, DELATTE DANIELLE M, GALLUP BENJAMIN H, HICKS DANIELLE, CHEN XUEFENG, SCOLNIK NATASHA K, FREY DANIEL D
Format:	Patent
Sprache:	eng
Schlagworte:	CYCLES LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS PERFORMING OPERATIONS POWERED PROPULSION OF SLEDGES OR RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES TRANSPORTING
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Beschreibung
Zusammenfassung:	A manually powered wheelchair includes a first lever associated with a first rear wheel and demountably coupled to a first drivetrain, the first lever having a first brake thereon. The wheelchair also includes a second lever associated with a second rear wheel and demountably coupled to a second drivetrain, the second lever having a second brake thereon. Each drivetrain includes a chainring, a chain, and a freewheel, and each drivetrain has a fixed gear ratio. The freewheel of each drivetrain is actuated by manual pivoting of the lever associated therewith. In use, the wheelchair achieves changes in mechanical advantage when a user shifts the user's hands up and down the first and second levers.