Auto-calibration of pressure transducer offset
US6237592A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1998 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Feb 3, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3358
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A flow generator for the supply of breathable gas, which includes an electric motor driving a turbine, control circuitry, a pressure transducer to sense delivery pressure at or remote from said flow generator and whose electrical output is connected to the control circuitry, and sensing means connected to the control circuitry, and wherein the control circuitry is operable to determine from the sensing means whether the electric motor or the turbine are operating and from the pressure transducer whether there is no pressure activity, and if both determinations are satisfied, to accept the output of the transducer as a calibrated pressure offset value representative of atmospheric pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.