Patent ID: 9016786
Filing Date: 2015-04-28
Classification: A47C

Abstract:
1. A seating furniture item comprising a seat, a column, a base, a spring device for cushioning the up and down movement of the seat, a pendulum device for inducing a pendular response of the column by means of the seat, and a device for automatically adjusting the pendular return force in accordance with the weight of a person occupying the seat; wherein said column or a part of the column or a control element has a sinking movement in use of the seat by a person, travel of said column or said part of said column or said control element determines a length of a return lever arm between a pendulum fulcrum point and a striking point of a return force based upon the weight of the person; said pendulum fulcrum point is defined by a first surface of said device, a first circular outer surface of said column or said part of said column or said control element being in continuous sliding contact with said first surface to define said pendulum fulcrum point; said striking point is defined by a second surface of said device, a second circular outer surface of said column or said part of said column or said control element being in continuous sliding contact with said second surface to define said striking point; and said pendulum fulcrum point being moveable with respect to said striking point to determine the length of the return lever arm based on the weight of the person.