US 12,012,742 B2
Drain configuration
John Henry, Milwaukee, WI (US); Josh Hitchcock, Milwaukee, WI (US); Mike Shipley, Milwaukee, WI (US); and Cody Henry, Milwaukee, WI (US)
Assigned to ZURN WATER, LLC, Milwaukee, WI (US)
Filed by Zurn Industries, LLC, Milwaukee, WI (US)
Filed on Jan. 15, 2021, as Appl. No. 17/150,276.
Claims priority of provisional application 62/962,477, filed on Jan. 17, 2020.
Prior Publication US 2021/0222418 A1, Jul. 22, 2021
Int. Cl. E03F 5/04 (2006.01); B01D 29/085 (2006.01); B01D 29/11 (2006.01); C02F 1/00 (2023.01)
CPC E03F 5/0407 (2013.01) [B01D 29/085 (2013.01); B01D 29/11 (2013.01); C02F 1/003 (2013.01); C02F 2307/08 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A drain configured to be positioned in an aperture in a floor surface, the drain comprising:
a flange defining an opening, the flange extending over the floor surface and configured to engage the floor surface;
a first conduit connected to the flange and extending through the aperture in the floor surface, the first conduit defining a first length extending downward from the flange, the first conduit defining a first perimeter; and
a second conduit connected to the flange and extending through the aperture in the floor surface, the second conduit in contact with a portion of a floor structure, the second conduit defining a second length extending downward from the flange, the second conduit defining a second perimeter, the second perimeter being greater than the first perimeter, the second conduit surrounding the first conduit, the second conduit being outwardly spaced from the first conduit, and the first conduit and the second conduit being coaxial, the first conduit and the second conduit forming a gap therebetween that is filled with air having a gap air pressure, the gap air pressure being less than a pressure of the atmosphere surrounding the second conduit.