US Patent 7,775,718

A roller guide for adjustable vehicle seats. The roller guide includes at least one guide rail which is at least partially open at the side and at least two rollers which roll in the guide rail and are connected to the vehicle seat via at least one axle. At least one of the rollers is shaped like a cone or a truncated cone. The cone surface can roll as the bearing surface of the roller moves along an inner wall of the guide rail. The inner wall being arranged at an angle with respect to the longitudinal axis of the axle.

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