Static structures (e.g. – buildings) – Window or window sash – sill – mullion – or glazing – Decorative grill attached to sash
Reexamination Certificate
1999-11-19
2001-11-13
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
Window or window sash, sill, mullion, or glazing
Decorative grill attached to sash
C052S204620, C052S202000, C052S204600, C052S656700, C052S656800, C049S492100, C049S484100
Reexamination Certificate
active
06314690
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a window screen. More particularly, the invention relates to a window screen having strong components that may be used as an impact protective system, particularly for window protection from impacts due to debris from wind storms, hurricanes, tornados and the like, as well as vandalism.
BACKGROUND OF THE INVENTION
Windows are typically provided in structures such as residential homes, schools, office buildings and other buildings designed primarily for human occupation. Oftentimes it is desirable to allow for the windows to be opened so that outside air may enter the building. Screens are typically provided on such window openings so that air may pass through the window opening, but undesirable objects such as insects are kept outside of the building. Most prior art screens are made of aluminum mesh and do not have adequate strength to protect against window breakage. Also, whether the window can open or not, prior art screens are known that can protect window glass from damage, if strong enough.
In areas that are subject to high winds, such as areas that may experience hurricanes or tornados, it is desirable to provide a screen that will protect window glass from flying debris. Additionally, buildings that are prone to be vandalized, such as schools and low income housing, use screens to protect against glass breakage. One prior art screen that provides protection against glass breakage comprises stainless steel mesh within an aluminum frame.
However, in the prior art, the mesh and the glass are proximate one another. As a result, deflections of the mesh from impacts to the mesh by objects could result in glass breakage.
SUMMARY OF THE INVENTION
The invention of the application is a high strength window screen frame adapted to fit within a window opening in an exterior wall of a building in front of a window pane. The window screen frame includes an extruded metal frame that defines an opening for receiving mesh. A fascia portion of the extruded metal frame is provided on the frame proximate the opening. A standoff leg portion of the extruded metal frame extends rearward from the fascia portion. The standoff leg portion is longer than the fascia portion to provide sufficient separation between the window pane and the mesh to prevent deflections in the mesh from making contact with the window pane. Heavy duty mesh screen is preferably used with the high strength window screen frame of the invention. The window screen frame is screwed by fasteners to an exterior wall surrounding a window opening of a structure.
REFERENCES:
patent: 4932457 (1990-06-01), Duncan
patent: 5141046 (1992-08-01), Duncan
patent: 5906083 (1999-05-01), Olsen et al.
Arehart Fred B.
Lilie Glenn T.
Bracewell & Patterson L.L.P.
Chavez Patrick J.
CPI Group, Inc.
Friedman Carl D.
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