| 摘要 |
A solenoid actuator suitable for opening and closing an aperture to control fluid flow therethrough, comprises a closure member (630) and a solenoid plunger drive means (325). When the aperture is closed, the closure member is held in contact with a rim of the aperture (31) by a closure force. The solenoid plunger is slidably actuatable within a bore of a solenoid with a predetermined stroke, and is coupled to the closure member to transmit a plunger force to the closure member to open the aperture. The plunger is coupled to the closure member by a first resilient means (610) such that, when the plunger is actuated to open the aperture, the plunger is allowed to travel for a portion of its stroke before the plunger force transmitted to the closure member overcomes the closure force to open the aperture. |
