US Patent 11346145 Threshold assembly for an entryway system

A threshold assembly for use with an entryway disposed within an aperture of a structure, which has an exterior and an interior and includes a door panel moveable between open and closed positions, includes a sill and a rail. A rail is rotatably supported above the upper sill surface between an initial position when the door panel is in the open position, and a second position different from the initial position when the door panel is in the closed position. A biasing member is disposed between the upper sill surface of the sill and the rail to bias the rail from the second position toward the initial position.