Patent ID: 6254181
Filing Date: 2001-07-03
Classification: B60N

Abstract:
A vehicle seat comprising:a backrest,a seat extending in a longitudinal direction between a front end and a rear end adjacent to the backrest,a safety bar extending horizontally, perpendicular to the longitudinal direction, inside a seating element selected from the seat and the backrest, this seating element having a support surface designed to support an occupant, the safety bar being designed to restrict displacement of the occupant in a certain direction of displacement in the event of an accident, said safety bar being arranged, under normal circumstances, in a set-back position relative to the seating element, which is spaced back from the support surface, relatively speaking,connecting means for connecting the safety bar to the seating element,at least one activating device which can be triggered in the event of an accident in order to displace the safety bar relative to the seating element from its set-back position into an activated position closer to the support surface of the seating element, the connecting means being designed so that the safety bar follows a predetermined activation trajectory relative to the seating element until it reaches said activated position,and energy-dissipating means designed to decelerate the safety bar as it is displaced from its activated position to an end-of-travel position, during which it follows a certain dissipation trajectory directed substantially in the direction in which the occupant is displaced in the event of an accident, wherein the connecting means are designed so that the activation trajectory followed by the safety bar relative to the seating element comprises at least one portion common to the dissipation trajectory, this portion of the activation trajectory commencing at an intermediate point on the dissipation trajectory and continuing as far as the activated position.