US Patent 6874747 Seat track for vehicles

Disclosed herein is a seat track for vehicles. The fixed rail includes a horizontal bottom fixed piece, a pair of first and second grooves formed by bending both side portions of the fixed piece at a right angle and rounding a center portion of each of the resulting vertical bent portions to have an outwardly convex semi-circular form for allowing balls to be inserted therein, a first end piece formed by downwardly bending a vertical end portion of the second groove by an acute angle, a vertical piece extending upwardly from an upper end of the first groove by a relatively long length, and a second end piece formed by twice bending an upper end portion of the vertical piece at a right angle.