Continuously lockable adjustment device

A continuously lockable adjustment device for immobilizing elements which are movable relative to each other, said device comprising:

• a stepped cylinder having a first cylinder step and a second cylinder step, the second cylinder step having a larger cross-sectional area than the first cylinder step, wherein the first cylinder step has a closed end;
• a stepped piston having a first piston step guided in the first cylinder step and a second piston step guided in the second cylinder step;
• and
• a piston rod connected to the piston opposite the first piston step and extending sealed off out an end of the cylinder;
• wherein the cylinder has a first working space and a second working space separated by the piston and filled with a working fluid in which the piston can be displaced axially, thereby displacing working fluid from one working space to the other working space;
• and
• wherein the first working space is bounded by the first piston step and the closed end of the first cylinder step.

A continuously lockable adjustment device for immobilizing elements which are movable relative to each other, said device comprising:

• a stepped cylinder comprising a pressure tube and an insert supported in the pressure tube, the cylinder having a first cylinder step and a second cylinder step, the second cylinder step having a larger cross-sectional area than the first cylinder step, wherein the insert forms the first cylinder step and the pressure tube is formed with beads for fixing the inserts;
• a stepped piston having a first piston step guided in the first cylinder step and a second piston step guided in the second cylinder step;
• and
• a piston rod connected to the piston opposite the first piston step and extending sealed off out an end of the cylinder;
• wherein the cylinder has a first working space and a second working space separated by the piston and filled with a working fluid in which the piston can be displaced axially, thereby displacing working fluid from one working space to the other working space.

A continuously lockable adjustment device for immobilizing elements which are movable relative to each other, said device comprising:

• a stepped cylinder comprising a pressure tube and an insert supported in the pressure tube, the cylinder having a first cylinder step and a second cylinder step, the second cylinder step having a larger cross-sectional area than the first cylinder step, wherein the insert forms the first cylinder step;
• a stepped piston having a first piston step guided in the first cylinder step and a second piston step guided in the second cylinder step;
• a piston rod connected to the piston opposite the first piston step and extending sealed off out an end of the cylinder and;
• a volume equalization device in the cylinder at an end opposite from the piston rod, the volume equalization device comprising an equalization space filled with a working fluid;
• wherein the cylinder has a first working space and a second working space separated by the piston and filled with working fluid in which the piston can be displaced axially, thereby displacing working fluid from one working space to the other working space.

A continuously lockable adjustment device for immobilizing elements which are movable relative to each other, said device comprising:

• a stepped cylinder having a first cylinder step and a second cylinder step, the second cylinder step having a larger cross-sectional area than the first cylinder step;
• a stepped piston having a first piston step guided in the first cylinder step and a second piston step guided in the second cylinder step;
• and
• a piston rod connected to the piston opposite the first piston step and extending sealed off out an end of the cylinder;
• wherein the cylinder has a first working space and a second working space separated by the piston and filled with a working fluid in which the piston can be displaced axially, thereby displacing working fluid from one working space to the other working space;
• and
• wherein each of said first and second cylinder steps has at least one bypass groove which is effective to bypass working fluid around each of said first and second piston steps when the piston rod is pushed into the cylinder.