Static structures (e.g. – buildings) – Window or window sash – sill – mullion – or glazing – Attaching means securing a pane to a sash member or to...
Reexamination Certificate
1998-11-17
2001-05-15
Stephan, Beth A. (Department: 3635)
Static structures (e.g., buildings)
Window or window sash, sill, mullion, or glazing
Attaching means securing a pane to a sash member or to...
C052S204500, C292S158000, C292S139000, C292S336300, C403S348000, C403S353000, C049S252000
Reexamination Certificate
active
06230457
ABSTRACT:
BACKGROUND OF THE INVENTION
Casement windows include a sash hinged to a frame or jamb so that by rotation of the handle the window could be moved to an open position or a closed position. Various structures have been suggested to attempt to provide a firm locking of the sash to the frame. Problems exist, however, regarding the window sagging while in the locked as well as the open condition.
SUMMARY OF THE INVENTION
An object of this invention is to provide a sag prevention and correcting system for windows, particularly casement windows.
A further object of this invention is to provide such a sag prevention system which operates in connection with the locking arrangement.
In accordance with this invention the sag prevention system is used with a locking arrangement wherein the sash includes at least one and preferably a pair of spaced keepers of a multi-point locking system. The frame has a tie bar arrangement with a roller for each keeper. When the window is rotated to its closed condition the handle for the tie bar arrangement is moved to slide the rollers upwardly for engagement with the keepers. In accordance with the invention a lifting block is located adjacent one of the keepers to be disposed directly above its roller when the window is in the locked condition. The lifting block may be integral with the keeper or may be a separate member. Any sagging is prevented by the lifting block contacting the roller.
REFERENCES:
patent: 4991886 (1991-02-01), Nolte
patent: 5074075 (1991-12-01), See
patent: 5118145 (1992-06-01), Tucker
patent: 5448857 (1995-09-01), Stormo
patent: 5791700 (1998-08-01), Biron
patent: 5829802 (1998-11-01), Anderson
patent: 5927768 (1999-07-01), Dallmann
Multi-Point Locking System brochure, 1992.
Multi-Point Locking System brochure, 1993.
Connolly Bove Lodge & Hutz
Stephan Beth A.
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