Invalid positioning device
US6557189B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Jul 6, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S414/134
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An invalid positioning device comprising a support structure, a lifting element which is angularly displaceable about a main horizontal axis relative to the support structure, and a power operated mechanism for pivoting the lifting element about the the main horizontal axis. The power operated mechanism is arranged such that the torque applied by the power operated mechanism decreases as the lifting element moves away from one extreme position and increases again as the lifting element approaches its other extreme position and such that the angular speed of the lifting element increases as it moves away from one extreme position and decreases as it approaches its other extreme position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.