A spring device, the spring device comprising an elongated elastic torsion device configured to rotate about a central longitudinal axis at a load, the torsion device comprising: - an elongated internal profile having a longitudinal axis along the central longitudinal axis; - an elongated external profile comprising an elongated cavity having a longitudinal axis along the central longitudinal axis, - at least three elongated elastic elements having a longitudinal axis parallel to the central longitudinal axis; - wherein the internal profile and the elongated elastic elements are at least partially located in the cavity of the external profile, and - wherein the elongated elastic elements, respectively, are arranged at different angular positions about the central longitudinal axis between the internal profile and the external profile so that a rotation about the central longitudinal axis is realized under load by an elastic deformation of the elongated elastic elements, - wherein the elongated elastic elements comprise an internal cavity configured to comprise a pressurized gas; - wherein the internal profile comprises at least one protrusion or projection towards the external profile abutting one side of a respective elastic element; - wherein the external profile comprises at least one projection towards the internal profile abutting the opposite side of a respective elastic element; - wherein each of the elastic elements is partially bounded on two opposite sides by the projection of the internal profile and the projection of the external profile, respectively; - wherein the respective projection (118, 128) comprises a radial part (114, 124): - against which the elastic element can abut; and - that extends over a distance in a radial direction greater than half the distance between the internal profile and the external profile at the level of the elastic element; - wherein the spring device has a respective opening (115, 125) at the radial part (114, 124) of the respective projection (118, 128) of the internal profile or the external profile according to the radial direction, respectively between the respective projection (118, 128) and the internal circumference of the external profile or the external circumference of the internal profile, respectively, and characterised in that the respective opening (115, 125) is configured to allow the elastic element to expand through this opening (115, 125) beyond the angular position of the radial part (114, 124). - an elongated internal profile having a longitudinal axis along the central longitudinal axis; - an elongated external profile comprising an elongated cavity having a longitudinal axis along the central longitudinal axis, - at least three elongated elastic elements having a longitudinal axis parallel to the central longitudinal axis; - wherein the internal profile and the elongated elastic elements are at least partially located in the cavity of the external profile, and - wherein the elongated elastic elements, respectively, are arranged at different angular positions about the central longitudinal axis between the internal profile and the external profile so that a rotation about the central longitudinal axis is realized under load by an elastic deformation of the elongated elastic elements, - wherein the elongated elastic elements comprise an internal cavity configured to comprise a pressurized gas; - wherein the internal profile comprises at least one protrusion or projection towards the external profile abutting one side of a respective elastic element; - wherein the external profile comprises at least one projection towards the internal profile abutting the opposite side of a respective elastic element; - wherein each of the elastic elements is partially bounded on two opposite sides by the projection of the internal profile and the projection of the external profile, respectively; - wherein the respective projection (118, 128) comprises a radial part (114, 124): - against which the elastic element can abut; and - that extends over a distance in a radial direction greater than half the distance between the internal profile and the external profile at the level of the elastic element; - against which the elastic element can abut; and - that extends over a distance in a radial direction greater than half the distance between the internal profile and the external profile at the level of the elastic element; - wherein the spring device has a respective opening (115, 125) at the radial part (114, 124) of the respective projection (118, 128) of the internal profile or the external profile according to the radial direction, respectively between the respective projection (118, 128) and the internal circumference of the external profile or the external circumference of the internal profile, respectively, and characterised in that the respective opening (115, 125) is configured to allow the elastic element to expand through this opening (115, 125) beyond the angular position of the radial part (114, 124).