Oxygen control in breathing apparatus
US8800344B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2008 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Oct 15, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/435
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An oxygen sensor arrangement is arranged to sense the oxygen in a breathing loop of a breathing apparatus. The sensor arrangement comprises at least one primary oxygen sensor arranged to operatively measure the oxygen in the breathing loop, and a control arrangement for obtaining measures from the oxygen sensor. A test channel arrangement is adapted to operatively provide a first gas having a first fraction of oxygen from a first supply to the primary oxygen sensor at a position adjacent to or directly adjacent to the primary oxygen sensor. A first test valve arrangement is arranged to operatively open and close the flow of the first gas through the test channel arrangement. The control arrangement is arranged to operatively actuate the first test valve arrangement so as to provide an amount of the first gas to the primary oxygen sensor via the test channel arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.