Fluidizable bed with occupancy status detection and method of occupancy status detection for a fluidizable bed
US9700239B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2012 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Jul 2, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61G2203/34
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of detecting a change in occupancy status of a fluidizable bed (10) includes determining (102) an unloaded plenum pressure value corresponding to the absence of a load on the bed, determining (104) a loaded plenum pressure value corresponding to the presence of an occupant on the bed, and establishing a reference (PREF) as a function of at least one of the unloaded plenum pressure value and the loaded plenum pressure value. A signal (116, 120) is issued in response to a relationship between the reference and a value (PMON) representative of actual pressure in the plenum. The bed also includes a pressure sensor (60) for monitoring a pressure value representative of pressure in the plenum and a controller (50) for issuing a signal (116, 120) responsive to a relationship between the monitored value and a reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.