Shock absorber and shock absorber assembly

A shock absorber for a wheel suspension of a vehicle, the shock absorber comprising:

• an outer cylinder;
• an outer piston that is axially displaceably guided in the outer cylinder;
• an inner piston that is axially displaceably guided in the outer piston;
• and
• a piston rod that is connected to the inner piston and that is guided out of the outer piston,
• wherein a surface, which is located remote from the piston rod, of a piston portion of the outer piston, which is axially displaceably guided on an inner lateral surface of the outer cylinder, is connected so as to communicate partially with surroundings of the shock absorber;
• wherein the inner piston includes a piston portion of the inner piston and a guide pin,
• wherein the outer piston further includes a cylinder portion and a guide portion;
• wherein the piston portion of the inner piston is axially displaceably guided on an inner lateral surface of the cylinder portion and is connected to the piston rod,
• wherein the guide pin is arranged on a side of the piston portion remote from the piston rod and is concentrically connected to the piston portion of the inner piston,
• wherein the guide pin is axially displaceably guided on an inner lateral surface of the guide portion, and
• wherein a fluid channel is provided with at least one piston valve to run axially through the piston portion of the inner piston and the guide pin;
• wherein an opening is configured on a lateral surface of the cylinder portion,
• wherein a first working chamber is located inside the cylinder portion and is arranged on a side of the piston portion of the inner piston remote from the piston rod and is connected by the opening so as to communicate with a second working chamber that radially outwardly encloses the cylinder portion inside the outer cylinder and that is axially defined on one side by the piston portion of the outer piston,
• wherein an inner cylinder having an annular configuration is filled with a gas and is immovably fastened to the inner lateral surface of the outer cylinder over a circumference of the inner lateral surface,
• wherein the guide portion of the outer piston is axially displaceably guided on the inner lateral surface of the guide portion, and
• wherein the inner cylinder is closed on a side facing the piston portion of the outer piston via an annular terminal element and on a side remote from the piston portion of the outer piston via a separating piston that is axially displaceably guided inside the inner cylinder.

A shock absorber assembly for a wheel suspension of a vehicle, the assembly comprising:

• a pressure application device;
• and
• shock absorber operably coupled to the pressure application device, the shock absorber comprising:
• an outer cylinder;
• an outer piston that is axially displaceably guided in the outer cylinder;
• an inner piston that is axially displaceably guided in the outer piston;
• and
• a piston rod that is connected to the inner piston and that is guided out of the outer piston,
• wherein a surface, which is located remote from the piston rod, of a piston portion of the outer piston, which is axially displaceably guided on an inner lateral surface of the outer cylinder, is connected so as to communicate partially with surroundings of the shock absorber;
• wherein the outer piston further includes a cylinder portion;
• wherein an opening is configured on a lateral surface of the cylinder portion;
• wherein a first working chamber is located inside the cylinder portion of the outer piston on a side of a piston portion of the inner piston and the first working chamber is connected by the opening to communicate with a second working chamber that radially outwardly encloses the cylinder portion inside the outer cylinder and is axially defined on one side by the piston portion of the outer piston.