Compensated valve for breathing system
US4616646A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1985 |
| Grant date | Oct 14, 1986 |
| Priority date | — |
| Expiry date | Mar 13, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2544
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A combined inhalation/exhalation valve for use on a breathing mask for high altitude flights comprises a housing carried by the mask and connectable to a demand regulator. A one-part diaphragm located in the housing controls gas flow. The diaphragm has a cup whose bottom wall is provided with a radial lip seal cooperating with an exhalation seat. The cup is annular. It defines a tore-shaped chamber subjected to the compensation pressure, e.g. to the pressure which prevails in the exhalation line of the regulator connected to the valve. The bottom wall of the cup is further provided with a lip constituting the movable element of an inhalation valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.