Abstract: A hinge mounting for a seat back of a motor vehicle seat that is particularly suited for a motor vehicle seat having but one door on either side of the vehicle and has a first hinge arm, a second hinge arm and a round member that is interposed between the first hinge arm and the second hinge arm. The round member including (a) a first round plate connected to the first hinge arm, (b) a second round plate associated with the second hinge arm, (c) a clamp forming a partial grip around the rim of the two round plates to hold them together and (d) a stop device located between the two round plates. The two hinge arms are adapted for relative rotation about a hinge pin. The clamp has a cutout. The second round plate includes at least one retainer face located in the region of the cutout. A releasable retainer device matching the retainer face, cooperating therewith and optionally blocking same is provided on the second hinge arm.

Abstract: The invention relates to an integral seat of an automotive vehicle having an underframe (20), a seat pan (30) carried by said underframe (20), a seat back (32) and a seat belt mechanism, said seat belt mechanism comprising a seat belt (34) with a tongue member (36) that divides the seat belt (34) in a shoulder belt (40) and a lap belt (42), said seat belt (34) having an upper end formed by the shoulder belt (40) and a lower end formed by the lap belt (42), a primary automatic belt tensioner (44) that is disposed on the underframe (20) and in which there is secured the lower end of the seat belt (34) and a secondary automatic belt tensioner (52) that is disposed in the seat back (32) and in which there is secured the upper end of the seat belt (34).