Folding wheelchairs
US4736960A · kind A · utility
22Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Sep 10, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61G5/085
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A folding wheelchair includes a pair of side frames which are collapsible in their own planes. There is simultaneous collapse of two pairs of strut members. The collapsed wheelchair is very compact, even though the erected wheelchair is very reliable due, at least in part, to its avoidance of areas of high stress concentration. In alternatives, the scissor-like strut members are replaced by fixed struts so that collapse in the height direction is not accompanied by collapse in the width direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.