A vehicle seat for an automobile has a shell with a transverse slot and at least one energy absorbing support located in the slot, in the front part of the seat. The support is horizontally deformable by the pelvis of the occupant when the latter is displaced forward as a result of a sharp deceleration of the vehicle. The portion of the shell behind the support is deformable downwardly at least partially by the pelvis of the occupant when he or she is displaced forward as a result of a sharp deceleration of the vehicle. The height of the support remains substantially unchanged as a result.
A vehicle seat has a back-rest (1) and a squab (2), a transverse beam (3) provided at the front of the squab is provided with a chamber (13), at least part of one wall being constituted by a plastically deformable metal sheet (12). The chamber is associated with a gas generator adapted to inflate the chamber (13) with an associated plastic deformation of the sheet. The inflated chamber minimizes the risk of an occupant of the seat "submarining" beneath a safety belt.
A safety device for a motor vehicle seat comprising a seat surface which extends along a longitudinal direction of the seat, a securing element assigned to the seat surface and a drive device which is operatively connected to the securing element and is activated in a crash situation, in order to move the securing element out of a starting position, without changing the spatial position thereof, so that the seat surface and the securing element oppose the forward displacement of the pelvis of a person sitting on the seat surface in the longitudinal direction of the seat.
