| 摘要 |
<p>The hydraulic actuating drive, with a piston (1) movable in a bush (4), has a transverse bore (9) for ventilating of the bush and is connected to a slot (10) which communicates with the environment. The transverse bore is permanently connected to a piston intermediate chamber (8) regardless of the axial position of the piston inside the bush. The intermediate chamber extends in the axial direction between a sealing lip (3) which seals the pressure chamber on the piston side facing away from the operated unit (7), and a sealing lip (2) which seals the space on the other side of the piston.</p> |
