US 12,215,543 B2
Window frame assembly
Michael Dietmar Nau, North Port, FL (US); Kenneth John Vander Bent, Jr., Bradenton, FL (US); and Joseph Mark Johnson, Port Charlotte, FL (US)
Assigned to PGT INNOVATIONS, LLC, Harrisburg, PA (US)
Filed by PGT Innovations, Inc., North Venice, FL (US)
Filed on Nov. 30, 2021, as Appl. No. 17/538,887.
Prior Publication US 2023/0167672 A1, Jun. 1, 2023
Int. Cl. E06B 7/14 (2006.01); E06B 3/06 (2006.01); E06B 7/23 (2006.01)
CPC E06B 7/14 (2013.01) [E06B 3/06 (2013.01); E06B 7/23 (2013.01); E06B 7/231 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A lift rail and sill assembly for a window frame assembly comprising:
a lift rail defining a lower rail end and an upper rail end, the lift rail further defining a seal retaining channel, the lift rail movable between an open position and a closed position;
a seal received in the seal retaining channel of the lift rail; and
a sill defining a lower sill end and an upper sill end, the sill comprising a sill ledge arranged at the lower sill end and a sill flange extending from the sill ledge to the upper sill end;
wherein a gap is defined between the sill ledge and the lower rail end of the lift rail in the closed position to allow fluid to flow between the sill ledge and the lower rail end, and wherein the seal engages the sill flange in the closed position.