Hydraulic actuator has high impedance choke channel between pressure chamber and reservoir chamber that can be closed by closure device provided in actuator

摘要

The device has opposing clamping regions formed by displaceable parts with a gas-tight pressure chamber between them of volume determined by their separation connected to a reservoir chamber, via a one-way valve and a choke channel. The parts are loaded by a force tending to increase the pressure chamber volume. The reservoir volume is externally closed and variable by a movable wall region. The choke channel can be closed by a closure device. The device has opposing clamping regions for clamping between two outer thrust blocks and formed by first and second mutually displaceable parts (1,2) with a gas-tight pressure chamber (6) between them of volume determined by their separation and connected to a reservoir chamber (7), via a one-way valve and a high impedance choke channel (13). Both parts are loaded by a force tending to increase the pressure chamber volume. The reservoir volume is externally closed and variable by a movable bounding wall region. The choke channel can be closed by a closure device (9,10) provided in the actuator.