Power seat slide device for vehicles

Claim 1

A power seat slide device for a vehicle comprising: a lower rail for attachment to a vehicle floor defining a linear track, having a base portion and upwardly extending side portions ending in edges; an upper rail for attachment to a vehicle seat slidably attached to said lower rail for a linear movement of said upper rail along the track, having a top portion and downwardly depending side portions ending in edges, defining a space between the top portion and the base portion of said lower rail; a threaded rotatable shaft member having opposite ends housed in said space between said upper rail and said lower rail, one of said opposite ends linked to said upper rail; drive means linked to said threaded shaft member at the other said opposite end for imparting rotation to said threaded shaft member; motion translating means engaged with said threaded shaft member and attached to said lower rail, housed in said space between said upper rail and said lower rail, for translating the rotation of said threaded shaft member to the linear movement of said upper rail along the track; engaging means for engaging said upper rail and lower rail, including upwardly depending first U-shaped members disposed at said edges of the side portions of said upper rail, and downwardly depending second U-shaped members disposed at said edges of the side portions of said lower rail, said first U-shaped members engaging said second U-shaped members; guiding means provided in the engaging means for guiding the movement of said upper rail along the track; and roller means disposed between the base portion of said lower rail and said first U-shaped members for slidably supporting the upper rail during movement along the track.