Patent ID: 7669369

Claim:
A door threshold water return system, comprising: a lower sill; an upper sill; a rear wall; a front wall forming a chamber; and at least one stage having a substantially planar structure dividing the chamber into at least a first chamber and a second chamber, wherein the at least one stage contacts the upper and lower sill, is substantially perpendicularly connected to the lower sill, and comprises at least one lower aperture at the bottom of the at least one stage and at least one upper aperture at the top of the at least one stage, wherein at least one baffle is provided projecting from the rear wall, a first gap is provided in the first chamber in proximity to the rear wall and between the upper sill and the rear wall, and a second gap is provided in the second chamber in proximity to the lower sill and between the lower sill and the front wall, whereby water introduced into the system through the first gap flows through the first chamber, the at least one lower aperture in the at least one stage, the second chamber, and exits the system though the second gap, and air introduced into the system through the second gap flows through the second chamber, the at least one lower aperture in the at least one stage, the first chamber, and exits the system through the first gap until the water level exceeds a height of the at least one lower aperture, when air introduced into the system through the first gap passes through the at least one upper aperture in the at least one stage and accumulates in upper regions of the first and second chambers.