Patent ID: 6086151
Filing Date: 2000-07-11
Classification: A47C

Abstract:
A chair, which includes an at least partly resilient seat part (12), which is provided with support elements (14, 15) placed at both sides of an imaginary longitudinal and vertical centre plane (A) of the seat part, which elements are fitted to produce a force and movement that raises the seat part (12) variably and alternatingly, characterized in that the support elements (14, 15) are fitted side by side in the seat part (12) substantially exclusively in the area that is intended for the ischial tuberosities of the buttocks of the seated person so that they do not load the thighs of the seated person, and that the support elements (14, 15) are interconnected so that, when a substantially vertical load is applied to one support element (14, 15), said load produces a slowly increasing support force in a direction opposite to said load in the other support element (15/14), the chair further characterized in that the support elements comprise interconnected resilient elements (14, 15) so that, when external, substantially vertical loads of different magnitudes are applied to said resilient elements (14, 15), the resilient element (14/15) that is subjected to a higher load produces a force and movement of opposite direction in the other resilient element (15/14), and the chair further characterized in that the speed of the movement produced by an external load in the resilient elements (14, 15) is adjustable.