Self-contained breathing apparatus with provision for shared use
US4449524A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1982 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | Mar 15, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B7/02
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Self-contained breathing apparatus comprising a portable tank containing a supply of breathing air under high pressure, a main pressure regulator for reducing the pressure of air from the tank to a moderate level, a face mask having a demand valve mounted thereon which receives air from the main pressure regulator through a main supply hose and which controls the pressure and flow thereof to meet the users requirements, a bypass pressure regulator and flow control means which receives air from the tank and which controls the pressure and flow of air to the mask, through a separate bypass hose, to provide breathing air to the mask in the event of a fault in the main breathing circuit. The bypass hose is attached to the bypass pressure regulator and flow control by means of manually operable quick disconnect fitting, enabling emergency sharing of the air supply by a second, similarly equipped user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.