Self-contained breathing apparatus
US7571726B2 · kind B2 · utility
11Cited by
8References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 2005 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Jun 12, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4298
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention provides, in one aspect, a head up display unit for a re-circulating gas self-contained breathing apparatus of the type having at least one sensor for determining the oxygen partial pressure of the re-circulating gas. At least one optical fiber (32) is provided for transmitting a light signal or signals from a respective light emitter, positioned outside the wearer's field of view and electrically connected to the at least one sensor, to a display (26) in the wearer's field of view to provide the wearer with a visual indication of the light emitter signal or signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.