Demand and dilution mask regulator and method of regulating additional oxygen in the mask regulator
US7584753B2 · kind B2 · utility
6Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2004 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Jul 3, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2016/0027
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A demand and dilution mask regulator comprising an oxygen feed circuit and a dilution circuit for supplying air. The oxygen feed circuit and the dilution circuit are connected to a mixing chamber (35). In the dilution circuit, the inhaled breathe-in air flow rate is measured through a capillary duct (43) connected to a Venturi construction (41). A method of regulating the flow rate of additional oxygen uses flow rate data measured through the capillary duct (43) for controlling the oxygen flow rate to be supplied to the mixing chamber (35).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.