Compatible smoke and oxygen masks for use on aircraft
US4559939A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1984 |
| Grant date | Dec 24, 1985 |
| Priority date | — |
| Expiry date | Feb 13, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/912
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The invention is a smoke mask and oxygen mask combination that can be coupled together so that protection from toxic fumes and supplemental oxygen gas can be provided to the passenger during a concurrent fire and decompression aboard an aircraft. A protrusion 70' of a smoke mask 26' is provided with a flat surface 230 which is adapted to mate with an internal flat surface 234 of an oxygen mask 200' providing alignment of an oxygen inlet valve 210, vent valve 206 and cabin air inlet valve 208 on the oxygen mask with an inlet valve 170 vent valve 74 and plug, respectively, on the protrusion 70'. In addition, a resilient locking element 236 on the oxygen mask 200' engages a groove 232 on the protrusion 70' when the oxygen mask 200' is installed releasably securing the oxygen mask to the protrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.