Method and apparatus for supplying breathable gas in emergency oxygen systems, especially in an aircraft
US5809999A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Aug 29, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B7/14
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In an emergency oxygen supply system of an aircraft equipped with a pressurized cabin, breathable gas is supplied by a gas generator (1) for generating an oxygen-enriched gas either from the ambient air, or from air tapped from the engine, or from fresh water. The generator may also generate practically pure oxygen. A mixed gas is produced in a mixing unit (14) from the breathable gas and oxygen as needed especially in short duration transition periods to meet official regulations. The oxygen partial pressure in the mixed gas is varied or controlled depending on the cabin pressure. The breathable gas is fed in a constant mass flow through an on-board distribution network to the breathing masks connected to the network. Selectable masks for the crew may receive pure oxygen while most other masks for the passengers receive mixed gas having an adequate oxygen content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.