Patent ID: 6039398
Filing Date: 2000-03-21
Classification: A47C

Abstract:
A device which adjusts an inclination of a backrest to a seating portion in chairs in general, comprising a first structural element (2) rigid with the seating portion and a second structural element (28) rigid with the back-rest and hinged to the first structural element on a traverse hinging axis (34), characterised in that with one of the first and second structural elements (2, 28) there is attached a first member (12) provided with an inclined surface (16) and rotating about a rotational axis (14) which intersects said transverse hinging axis (34), with the other of the first and second structural elements (28, 2) there being attached a second member comprising at least one cylinder portion centered on a longitudinal axis and (32) maintained constantly with its circumferential surface resting on said inclined surface (16) along a line, for any angular position of said first member (12), the longitudinal axis of said cylinder portion (32) intersecting the point of intersection of the rotational axis of said first member (12) with the transverse hinging axis on which said first structural element (2) and said second structural element (28) are hinged together.