Movable or removable closures – With means mounting closure for reciprocation – Interengaging meeting rails
Patent
1994-01-19
1995-09-05
Kannan, Philip C.
Movable or removable closures
With means mounting closure for reciprocation
Interengaging meeting rails
49406, E05D 1516
Patent
active
054469970
ABSTRACT:
A window assembly includes standard-sized sashes with lock and keeper rails that overlap and interlock such that adjacent sides of the rails are held in close proximity when the assembly is closed. The lock rail includes an exterior wall with an exterior edge that protrudes slightly. The keeper rail includes an interior wall with a first side, a substantially parallel second side and a top edge that extends between the two sides. The top edge includes an integral trough for receiving the protruding edge of the lock rail. When the assembly is closed, the protruding edge overlaps and interconnects with the keeper rail, such that the edge sits in the trough. The exterior wall of the lock rail is thus held in close proximity to the second side of the interior wall of the keeper rail and air flow between the rails is minimized. The rails preferably support strategically placed upper and lower gaskets, which are hidden from view when the assembly is closed. The keeper rail supports the lower gasket, which blocks air flow between the lower sections of the rails and provides a first layer of protection against air infiltration from the exterior of the structure. The lock rail supports the upper gasket and positions it directly below the protruding edge. The free end of this upper gasket rests against an upper edge of the keeper rail, and thus, against an edge of the trough, to further reduce air infiltration.
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Kannan Philip C.
SLI, Inc.
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