Erecting seat structure to assist invalids from seated to standing, upright position, particularly erecting wheelchairs
US4076304A · kind A · utility
61Cited by
10References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1977 |
| Grant date | Feb 28, 1978 |
| Priority date | — |
| Expiry date | Jan 24, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S297/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
To provide for smooth simple operation of an erecting seat, a motor, through a reduction gearing, drives a shaft located transverse of the seat structure, or wheelchair, to the end points of which a crank drive is attached coupled to the seat, the crank drive being arranged to provide, upon erecting or lowering movement of the seat a nonlinear time-displacement function which is effectively sinusoidal, so that movement of the seat between the end positions starts slowly, then is accelerated, and then again slowly reaches the end position. Erecting movement can be assisted by springs, preferably located at either side of the seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.