Wheelchair driver and braking system
US5263729A · kind A · utility
Inventors
Key dates
| Filing date | Feb 4, 1992 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Feb 4, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62B5/0485
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A wheelchair driver having a simple, efficient structure is mountable to a horizontal frame extension of a wheelchair between a wheel and the wheelchair's frame. The driver is mounted directly to a spindle sleeve fastened to the horizontal frame extension which provides a race for the driver to run upon. The spindle sleeve also isolates the driver from the wheel preventing any friction between the wheel and the driver. The driver has a lever extending upward from the spindle sleeve above the tire of the wheel. A handle is provided on the uppermost end for a user. The lever has a pawl extending over the tire of the wheel. The pawl has teeth on a lower surface and contacts against the tire. When the lever is rotated around the spindle sleeve the pawl teeth grab the tire causing the wheelchair to move. When the lever is stopped or rotated oppositely, the pawl teeth release the tire and allow the wheelchair's momentum to move the wheelchair until another forward rotation of the lever provides additional force. Brake pads on the lever, adjacent to rims of the wheels, are forcible against the rims providing the user with a wheelchair brake. The wheelchair driver provides a user with a sa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.