Patent ID: 8251336
Filing Date: 2012-08-28
Classification: B60N,F16C

Abstract:
1. A seat track mechanism capable of mounting to a vehicle, comprising: a lower rail mountable to a vehicle floor; an upper rail supported by said lower rail to be slidable relative to said lower rail; and upper and lower spherical rotators held between said lower rail and said upper rail, wherein said spherical rotators roll according to a sliding movement of said upper rail, and wherein the upper and lower spherical rotators have different diameters, wherein one of said upper rail and said lower rail includes at least one horizontal flat portion substantially parallel to a widthwise direction of said seat track mechanism and substantially parallel to a direction of said sliding movement of said upper rail, wherein the other of said upper rail and said lower rail includes at least one rotator supporting recess having a circularly arcuate shape in cross section which is uniform in a lengthwise direction of said seat track mechanism, at least one of said spherical rotators being held between said rotator supporting recess and said horizontal flat portion, wherein said horizontal flat portion extends substantially parallel to said widthwise direction at both sides of said at least one spherical rotator from a point of contact between said horizontal flat portion and said at least one spherical rotator, wherein said rotator supporting recess is formed at a base of said lower rail, and wherein said horizontal flat portion is formed on said upper rail.