| 摘要 |
<p>A breathing gas regulator 12 for regulating delivery of breathing gas to an aircrew member wearing a liquid filled G-suit 11 includes a relay valve 15 having a diaphragm mounted valve plate 66 for sensing G-suit hydrostatic pressure. A bleed of breathing gas is supplied to the relay valve by way of a pneumatic link 14 and is vented to ambient through a vent outlet 72. As G-suit hydrostatic pressure rises due to increasing G-load the valve plate 66 moves towards closing the vent outlet 72. 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 53 of a valve 50/51 controlling outflow from a breathing-pressure control chamber 31 so that pressure in the control chamber 31 increases to set a breathing gas pressure at the regulator outlet 18 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 15 the liquid is able to bleed to ambient through the vent outlet 72. <IMAGE></p> |
