Activation device for a piston/cylinder unit which can be inhibited
AssigneeStabilus GmbH
InventorAxel Knopp
Life of this patent
Estimating the term…
Abstract
A piston/cylinder unit having a selectively inhibited movement includes a cylinder filled with a hydraulic medium and a piston arranged on a piston rod and dividing the cylinder into working spaces. A flow connection system having a flow connection is arranged between the first and second working spaces. The flow connection system includes an on-off valve having a movable valve element which opens the flow connection as a function of a position of the movable valve element. The flow connection system further includes a load-dependent valve arranged in series with the on-off valve for inhibiting complete flow through the flow connection independently from the on-off valve when a load on the piston/cylinder unit is lower than an inhibiting load.
Claims13
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.
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 and said on-off valve are combined to form a structural unit and control pressure connections act on opposing sides of said valve element of said load-dependent valve.
Dependencies are inferred from the claim text.