Respirator having an oxygen-releasing chemical cartridge and means for attaching an additional cartridge
US4187843A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1978 |
| Grant date | Feb 12, 1980 |
| Priority date | — |
| Expiry date | Jan 19, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B7/08
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A respirator comprises an air hose which has a mouthpiece which is adapted to be connected to the patient and an opposite end which is connected into a first cartridge housing which has an oxygen-liberating chemical therein. The first cartridge housing has a tubular inlet member connected between the air hose and the housing which has a through-flow air passage from the air hose into the housing, and has a second cartridge receiving opening intermediate the air passage. The first cartridge housing has a bottom wall which is spaced from the chemical therein and which has a connection at one end for connecting an air bag which is arranged around the cartridge. The opposite end of the bottom wall has a second cartridge receiving opening. The second cartridge housing has one end with a laterally extending tubular connection piece which defines an air flow passage which is insertable into the first receiving opening of the first housing in a manner such that it blocks the flow passage. The flow is instead diverted through an opening in the tubular connection into the second housing past an auxiliary oxygen-liberating chemical arranged in the second housing. In addition, coupling means a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.