Hand operated wheel-chair
US3953054A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1974 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Mar 18, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62B5/048
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hand operated wheel-chair with a pair of main wheels rigidly connected with the frame-work of the chair, at least one of which is either motor or hand operated and at least one castor wheel being pivotally connected with the frame-work of the chair and at least one support wheel being rigidly connected with the frame-work. At least one castor wheel and support wheel are positioned on each side of a line extending between the support points of the main wheels and at a level above the ground surface to permit either the castor or the support wheels to be in contact with the ground surface depending on whether the vertical through the center of gravity is located on one or the other side of said line between the support points of the main wheels. The wheel-chair also comprises a seat, which is disposed substantially mid-way between the main wheels and is supported by a transverse portion of the frame-work extending between the main wheels and being provided with a seat support in the form of a central column, which includes spring members for the seat and means for adjusting the height of the seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.