| 摘要 |
<p>Valve devices (9c, 15, 2b) are provided in the body (1) of the servo-diverter and include a movable control member (9) which extends through both chambers (2, 3). This member (9) can be displaced between first and second conditions in which the valve devices (9c, 15, 2b) allow communication between the supply connector (4) and the outlet (6) of the first chamber (2) and between the outlet (6) and the exhaust opening (5), respectively, by the effect of the difference between the pressures supplied to the said first and second inlet openings (22, 19) and against the action of an opposing spring (18). The control member (9) also has a reaction surface (9b) on which the pressure supplied to the outlet (6) of the first chamber (2) acts against the action of the opposing spring (18), so that the control member (9) can assume an intermediate condition in which the valve devices (9c, 15, 2b) disconnect the outlet (6) of the first chamber (2) from the inlet connector (4) and from the exhaust opening (5) when the pressure supplied to the outlet (6) reaches a predetermined value.</p> |
