Manual/electric twin jack bed
US5063624A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | May 8, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61G7/018
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A mobile hospital stretcher includes a movably supported base, and two spaced hydraulic cylinders on the base which vertically movably support a support member having an upwardly facing support surface. Separate control systems are provided for the hydraulic cylinders, one of which is electrically powered and the other of which is mechanically powered. The electrically powered system includes an electrically actuable valve for selectively bleeding fluid from one of the cylinders, an electrically actuable pump for supplying fluid to the other cylinder, a limit arrangement which produces a signal when the first cylinder is fully retracted, a manually operable switch for electrically actuating the valve, and an arrangement responsive to the presence of the first signal during actuation of the switch for electrically actuating the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.