Gas-sensing mask
US5857460A · kind A · utility
157Cited by
21References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1996 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Mar 14, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/432
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A gas sensing mask and system which senses and indicates the presence or absence of a selected respired gas. The mask includes a non-porous housing that is sized to seat over the nose and mouth of a subject. The mask includes a fluid aperture that is coupled to a fluid source and a sensor mounting aperture formed in an intermediate portion of the housing. A gas sensor, which senses one or more selected gases respired by the subject, is directly mounted within the sensor mounting aperture. The gas sensor includes a calorimetric indicator which visually indicates the presence or absence of the respired gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.