Patent ID: 7828522

Claim:
A housing unit for displacing fluid substantially along a single direction, the housing unit comprising: an elongated body element having a first end and a second end defining an aperture therethrough along a vertical axis and wherein the elongated body element has a substantially square shape when viewed along the vertical axis; a flange comprising a thin sheet, wherein the flange is disposed within the elongated body element perpendicular to the vertical axis and wherein the flange defines an opening laterally centered within the elongated body element; a mounting bracket disposed adjacent to the first end of the body element, the mounting bracket operative to couple with a fluid impelling device that includes a blade, wherein the mounting bracket is positioned so that, when the fluid impelling device is coupled to the mounting bracket, the blade is longitudinally positioned within the opening; and at least two plates disposed within the elongated body element and substantially perpendicular to the flange, wherein the at least two plates extends toward the second end from proximate the flange, wherein the at least two plates extend to the corners of the substantially square shaped elongated body element and wherein the two plates subdivide the cross sectional area of the elongated body as viewed along the vertical axis into four elongated ducts to create a column of downwardly moving fluid below the second end of the elongated body element.