Patent ID: 7237839

Claim:
An automobile vehicle seat featuring a seat back hinged to a seat pan and means for blocking the seat back with respect to the seat pan in an event of a forward impact, the means for blocking comprising a cam pivot-mounted on the seat pan along a transverse axis and a weight joined to the cam, with the cam arranged such that, in the event of the forward impact, the cam pivots by an inertia of the weight, and the cam engages with an arc-shaped lower edge of a seat back frame such that pivoting of the seat back is prevented by bracing of the cam against the arc-shaped lower edge of the seat back frame, wherein the automobile vehicle seat comprises a height adjustment mechanism having rear link rods pivoting on a seat pan frame around a pivot axis and arranged such that pivoting of the rear link rods results in vertical and longitudinal movement of the seat pan in relation to a the vehicle floor, and the rear link rods are rigidly joined so that the rear link rods rotate together on a height adjustment shaft, the height adjustment shaft having a transverse axis that coincides with the pivot axis of the rear link rods and the height adjustment shaft having ends that are pivot-mounted in journal bearings of the seat pan frame, the cam being pivot-mounted on the height adjustment shaft such that bracing of the cam against the arc-shaped lower edge of the seat back frame produces a high radial force on the height adjustment shaft, thereby limiting rotation of the height adjustment shaft.