US Patent 8215710 Seat having a seat panel and a backrest

A seat (10) having a seat panel (12) and a backrest (14) is described. The seat panel (12) is connected to a base device (16) by means of a first connecting device (18). The backrest (14) is connected to the seat panel (12) by means of a second correcting device (20). The first connecting device (18) comprises a pair of front and a pair of rear connecting levers (22, 24). The front connecting levers (22) are longer than the rear connecting levers (24). The rear connecting levers (24) are designed with an angled extension (34) so as to form toggle levers. The second connecting device (20) comprises a pair of rod elements (36) which are mounted in a pivotable and linearly movable manner on the seat panel (12) by way of their front end (38) and which are connected in a pivotable manner to the angled extension (34) of the rear connecting levers (24).