Aircrew breathing gas regulators
US5247926A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1991 |
| Grant date | Sep 28, 1993 |
| Priority date | — |
| Expiry date | Nov 26, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B9/02
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A breathing gas regulator for regulating delivery of breathing gas to an aircrew member wearing a liquid filled G-suit includes a relay valve having a diaphragm mounted valve plate for sensing G-suit hydrostatic pressure. A bleed of breathing gas is supplied to the relay valve by way of a pneumatic link and is vented to ambient through a vent outlet. As G-suit hydrostatic pressure rises due to increasing G-load the valve plate moves towards closing the vent outlet. Above a predetermined G-load, with the vent outlet closed, a pneumatic signal is generated in the pneumatic link and is applied to an end face of a valve controlling outflow from a breathing-pressure control chamber so that pressure in the control chamber increases to set a breathing gas pressure at the regulator outlet appropriate to positive pressure breathing. The regulator provides a low risk solution to interface with a liquid filled G-suit because in the event of leakage of liquid into the relay valve the liquid is able to bleed to ambient through the vent outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.