Wheelchair
US4341278A · kind A · utility
Inventor
Key dates
| Filing date | Feb 12, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Feb 12, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S180/907
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An electrically driven wheelchair having steerable rear wheels controllable by means of a joystick control operating an electromechanical steering mechanism including a control circuit. The electrical control circuit includes a voltage divider which receives a voltage determined according to the travelling speed of the wheelchair to enable the turning circle of the steering mechanism to be adjusted in relation to the travelling speed, so that at high speeds a large turning circle only is available while at low speeds a small turning circle is allowed, thereby minimizing the possibility of tipping the wheelchair over by turning too sharply at high speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.