Patent ID: 7827734
Filing Date: 2010-11-09
Classification: E06B

Abstract:
1. A window assembly comprising a main support frame including elongated plastic extrusions and adapted to be installed within an opening of a building structure, at least one movable sash frame surrounding a first glass window panel and supported for movement by said main support frame between an open position and a closed position, said movable sash frame including a first sash frame member, a second glass window panel supported by at least a second sash frame member positioned adjacent and horizontally overlapping said first sash frame member when said movable sash frame is in said closed position, a sash frame interlocking system including at least one clip member having a first flange extending perpendicular to said glass window panels and mounted on said first sash frame member, said clip member having a second flange connected to said first flange and extending parallel to said glass window panels, said second sash frame member including connected spaced apart walls defining a slot therebetween receiving said second flange of said clip member to interlock said first sash frame member to said second sash frame member in response to movement of said movable sash frame from said open position to said closed position, said spaced apart walls defining said slot being integrally connected by spaced apart tie walls having portions thereof cut away to define said slot, and said second flange being positioned to engage one of said spaced apart walls defining said slot therebetween in response to horizontal deflection of said sash frame members when said movable sash frame is in said closed position.