Patent ID: 6808233
Filing Date: 2004-10-26
Classification: B60N

Abstract:
An adjustment mechanism for adjusting a motor vehicle seat, said adjustment mechanism comprising a worm screw mounted in a nut which is carried by a rigid base, the worm screw being mounted to rotate relative to the base to cause the screw and the base to move in translation relative to each other along a longitudinal axis, the nut normally being held in a rest position relative to the base, and said nut being mounted on the base with a certain amount of clearance along the longitudinal axis;wherein said adjustment mechanism further comprises at least one locking piece which is mounted to move relative to the base between firstly a retracted position in which said locking piece does not interfere with the worm screw and secondly at least a first active position in which said locking piece comes into engagement with the worm screw to prevent said worm screw from moving relative to the base; wherein the nut is adapted to act on the locking piece when said nut is moved at least in a first direction along the longitudinal axis from the rest position of said nut; and wherein the locking piece is mounted on the base such that the nut moving in said first direction causes said locking piece to move towards its first active position.