Closed-circuit positive pressure breathing apparatus with pneumatically operated storage chamber
US4928685A · kind A · utility
8Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1988 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Oct 5, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B7/10
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
There is disclosed a self-contained breathing apparatus of the positive pressure type wherein there is provided a pneumatic servo mechanism responsive to a pressure sensor to drive a breathing storage chamber by expansion of an oxygen containing gas from a storage tank therefor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.