Patent ID: 7249801
Filing Date: 2007-07-31
Classification: A47C

Abstract:
1. Cushioning device to cushion a backrest with respect to the seat of a chair, comprising a first supporting element substantially vertical and connectable to said backrest, a second supporting element substantially horizontal and connectable to said seat, a pivoting element by means of which said first supporting element is pivoted to said second supporting element, and a helical spring disposed with its longitudinal axis substantially vertical and connected to said first supporting element and to said second supporting element to allow a reciprocal elastic movement, of a determined amplitude, between said backrest and said seat, wherein said first supporting element comprises a wall substantially vertical with respect to the vertical plane, wherein in said wall a lodging seat is provided to lodge, at least partially, said helical spring in such a manner that the longitudinal axis of said helical spring is substantially aligned with respect to said wall, wherein said spring is able to work by compression between said wall of said first supporting element and a rear portion of said second supporting element, and wherein a tooth is provided in said rear portion of said second supporting element, said tooth being faced upwards and inserted axially between the lower coils of said helical spring.