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Mattresses And Other Support Structures For Chairs And Beds
(AREA)
Abstract
Folding armchair, which is constituted by two lateral articulated parallelograms in which the front and rear sides extend downwards and upwards and are joined in a "U" shape, constituting respectively the front feet and the backrest, while the other sides of the parallelograms are constituted, on the one hand by both arms articulated to the ends of the front "U" and to an intermediate part of the posterior "U", and, on the other hand, by means of a third "U" that constitutes the seat, articulated at its ends to the posterior "U" and, near its bottom, to the front "U", to whose joint the ends of another U-shaped tubular piece are joined, the central part of which constitutes the legs of the chair and on which they rest, in an intermediate part of its length, the free ends of the posterior "U" that are also connected to it, by means of two articulated links. (Machine-translation by Google Translate, not legally binding)