US Patent 6971620 Adjustment mechanism for a vehicle seat slide

An adjustment mechanism for a slide of a motor vehicle seat, the adjustment mechanism comprising a worm screw, a first nut and a second nut rotatably receiving the worm screw, a support, and two resilient buffers received respectively between the first nut and the support, and between the second nut and the support. The adjustment mechanism further comprises a band forming a housing for receiving the two nuts and the two buffers and thereby forming a pre-assembled unit prior to being mounted on the support. The first and second nuts have tapped bores which have threads that start at different angular positions, so that screwing the worm screw into the nuts generates a gap between the first and second nuts.