Patent ID: 7021706

Claim:
A vehicle seat comprising a rigid support structure, a seat proper, a seat back provided with a rigid framework carried by the support structure, and a headrest, the framework of the seat back being connected to the support structure via at least first and second couplings that are disposed at different heights and that are adapted: normally, to hold the seat back in an in-use position; and when the seat back is subjected to high rearward stress, greater than a predetermined limit, to enable at least a top portion of the seat back to move rearwards at least to a safety position; in which seat the support structure comprises a substantially vertical central beam connected to the framework of the seat back by the first and second couplings, said central beam carrying the headrest independently of the seat back, said seat back being situated at a distance of said central beam, forward to said central beam, and said seat back extending laterally outwardly further than said central beam in opposite directions.