Locking device for locking objects that move in relation to each other

A locking device comprising

• a cylinder defining a chamber that is filled with a working fluid,
• a piston affixed to a piston rod and dividing the chamber into a first working section and-a second working section,
• a flow connection between the working sections which includes an accumulation chamber and an outflow section,
• a throttling point in the outflow section,
• a bypass communicating the first working section with the accumulation chamber,
• a check valve interposed between the first working section and the accumulation chamber, and
• and gate valve arranged to open and close the bypass, biased by a spring to close the bypass, and having a contact surface facing the accumulation chamber and acted on by a dynamic pressure of the working fluid when the check valve is open such that the gate valve opens against the bias of the spring when the check valve opens due to a pressure build up caused by the throttling point, whereby once the gate valve opens the bypass to permit working fluid to flow from the first working section through the outflow section and the throttling point to the second working section, the gate valve remains open regardless of the state of the check valve.