Patent ID: 6886450

Claim:
A piston/cylinder unit having a selectively inhibited movement, comprises: a cylinder filled with a hydraulic medium; a piston arranged on a piston rod and dividing said cylinder into working spaces; a flow connection system having a flow connection arranged between said first and second working spaces; an on-off valve arranged in said flow connection system and having a movable valve element, wherein said valve opens said flow connection as a function of a position of the movable valve element; and a load-dependent valve arranged in said flow connection system in series with said on-off valve for inhibiting complete flow through said flow connection independently from said on-off valve when a load on the piston/cylinder unit is lower than a non-inhibiting load, wherein said load-dependent valve has a control pressure connection to each of said first and second working spaces, the control pressure connections acting in opposite directions on said load-dependent valve.