| 摘要 |
1. Bistable switching device for opening and closing a gas circuit, in particular an oxygen circuit on board an aircraft, this circuit comprising a plunger (4) acted on by electromagnets, this plunger (4) being hollow and passed through by the gas and being fitted for translation opposite a seat (9) against which one end of the plunger (4) forming a valve bears in the position for closing the circuit, characterised in that it comprises a calibrated valve (6, 11, 12, 13) downstream of the said plunger, in the path of the gas, and the end (4B) of the plunger (4) which forms a valve and which shifts opposite the seat (9) defines a residual space (5) between the end and the said calibrated valve when the hollow plunger (4) and the calibrated valve (6, 11, 12, 13) are in the closed position. |
