Invalid hoists
US6329612A · kind A · utility
15Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 2, 2000 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Feb 2, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S177/09
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An invalid hoist comprises a mast, a lifting arm which can be raised and lowered by telescopically extending and retracting the mast and/or by raising and lowering a carriage, which may support the lifting arm, relative to the mast, and a load cell on the lifting arm for providing a signal representative of the weight of a person being lifted. The lifting arm is connected to the mast or the carriage by an arrangement which allows the lifting arm to be displaced angularly in a vertical plane against a spring force in order to maintain the load cell in a constant orientation as a vertical load is applied to the lifting arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.