An improvement device for the structure of armchairs. (Machine-translation by Google Translate, not legally binding)

摘要

An improvement device for the tilting of chairs, characterized by being constituted by an armored box linked to the underside of the chair or chair seat, where the axis of the central column of the chair impinges freely and inferiorly, fitting into a sleeve transverse carrier receiver of two opposite half-axes that end secured to the side walls of the box as a support point, while from said nuclear sleeve are joined projecting towards the interior, an association of free leaf springs, attached to the underside of a tilting lever body having two perforated rear flanges, freely fretted by said axes of support, the normal position of the spring being the passive, and forcing the inclination of the backrest of the spring and the activity of the spring. (Machine-translation by Google Translate, not legally binding)