Patent ID: 8485604

Claim:
A seat assembly, comprising: a seat base; a back support; a support for the back support or for the seat base, wherein the back support or the seat base is pivotably hinged to the support to allow a pivoting movement of the back support or of the seat base on a rotation axis; and at least one elastomer torsion-spring element comprising an internal casing, an external casing encompassing the internal casing, and an elastomer body arranged in a space between the internal casing and the external casing, wherein the internal casing comprises at least one contact surface at which the elastomer body is in contact with the internal casing, wherein the external casing comprises at least one contact surface at which the elastomer body is in contact with the external casing, wherein the elastomer body is rigidly connected to the contact surface of the internal casing and to the contact surface of the external casing, wherein the internal casing or the external casing of the at least one elastomer torsion-spring element is rotatably arranged on the rotation axis, wherein the support is coupled to the external casing of the at least one elastomer torsion-spring element, and the back support or the seat base is coupled to the internal casing of the at least one elastomer torsion-spring element, whereby during the respective pivoting movement of the back support or of the seat base, the internal casing rotates by a rotation angle about the rotation axis, during which rotation the internal casing is moved relative to the external casing, whereby deformation of the elastomer body is generated so that the elastomer body generates a restoring torque between the external casing and the internal casing, which restoring torque acts against the rotation, and wherein, in a sectional plane perpendicular to the rotation axis, the contact surface of the internal casing or of the external casing comprises a non-circular cross section.