Automatically positionable chair
US4956592A · kind A · utility
51Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1989 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Mar 31, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45022
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A programmable automatic positioning chair for medical application. The chair has moveable support surfaces which are driven by electric motors to preprogrammed positions. Motor speed is determined by measuring the motor current, and the motor speed is integrated by a microprocessor to produce a computed value of surface position. The chair operates "open loop" without any feedback from position sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.