Elevatable wheelchair
US5613697A · kind A · utility
Inventor
Key dates
| Filing date | Nov 18, 1994 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Nov 18, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61G5/104
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An elevatable wheelchair having a hydraulic system for elevating and lowering the wheelchair and a drive gear arrangement for motivating the wheelchair while the wheelchair is in an elevated position. The hydraulic system comprises four hydraulic legs, each corresponding to and coupled to one of a pair of front wheels or to one of a pair of auxiliary rear wheels. When hydraulic fluid is introduced to the four hydraulic legs, the hydraulic legs begin to extend, thereby elevating the wheelchair. The hydraulic system also comprises a pair of flow equalizers to ensure a uniform flow of hydraulic fluid to each hydraulic leg, thereby enabling each hydraulic leg to extend at the same rate. The elevatable wheelchair also comprises a drive gear arrangement which coacts with the main wheels of the wheelchair in order to transfer motion to the auxiliary rear wheels, thereby enabling the wheelchair user to motivate the wheelchair while in the elevated position by engaging the hand rails on the main wheels. The elevatable wheelchair provides an individual confined to the wheelchair with the ability not only to elevate the wheelchair to a desired height for reaching shelves, countertops and simi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.