| 摘要 |
<p>The atomiser pump has a fluid tank, a cap with an axial aperture to fasten the pump to the tank, and an actuator, moveably connected to the cap. A first pressure chamber (18) below the cap (13) is axially aligned with a second larger chamber (40), within the actuator (43). An internal piston (30) with upper and lower elements (31, 32) is inserted into the first chamber and may be displaced into the second one. The first piston element has an upper and a lower collar (41, 42), engaging elastically on the first chamber wall and sealing it. The first chamber has upper and lower ventilation apertures (28, 29), and a projecting rib, to form a gap between the wall and the lower collar. There is a spring (52) between the shoulder of the first chamber and a valve element (24) at the lower chamber end.</p> |
