Wheelchair drive system with lever propulsion and a hub-contained transmission

A drive mechanism for a lever propulsion wheelchair includes at least one clutch and at least one gear set contained within a central hub housing operatively coupled to the drive surface of the main wheel being driven. In the preferred embodiment, there are additional clutches and gear sets containe...

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Bibliographic Details
Main Authors COOK THOMAS MARTIN, KERREL SEAN, KYLSTRA BART, JAUVTIS NATHAN ISAIAH, HUFF JEREMY WINSTON
Format Patent
LanguageEnglish
Published 23.11.2010
Subjects
CHAIRS FOR DENTISTRY
CYCLES
FUNERAL DEVICES
HUMAN NECESSITIES
HYGIENE
LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
MEDICAL OR VETERINARY SCIENCE
OPERATING TABLES OR CHAIRS
PERFORMING OPERATIONS
POWERED PROPULSION OF SLEDGES OR
RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES
TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
TRANSPORT OR ACCOMODATION FOR PATIENTS
TRANSPORTING
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Summary:A drive mechanism for a lever propulsion wheelchair includes at least one clutch and at least one gear set contained within a central hub housing operatively coupled to the drive surface of the main wheel being driven. In the preferred embodiment, there are additional clutches and gear sets contained within the hub housing and coaxial to the wheel. By locating the transmission components within the hub housing and providing the coaxial arrangement, various user capabilities may be enabled without a significant increase in wheelchair width, as compared to the width of conventional pushrim propulsion wheelchairs. Transmission components are cooperatively arranged to provide capabilities that may include forward, rearward and neutral "gears," braking, anti-rollback, and quick-release removal.
Bibliography:Application Number: US20080079754