Anti-leakage window frame construction for tilt-in window sash
OwnerGerald Kesslerinventor
Life of this patent
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Abstract
A tilt-in window assembly of the type wherein the sash is conventionally held only at the top and bottom between extruded window frame side rails, previously allowing the sash to be bowed inwardly by heavy wind forces. The extruded window frame is now provided at its side rails with protrusions extending for the entire height of the frame. The sash has side flanges which cooperate with the side rail protrusions to limit the inward bowing of the sash so as to prevent the sash weather-stripping from disengaging from its normal sealing contact surfaces, thereby preventing external air from passing by the weather-strippping.
Claims8
A tilt-in window assembly comprising:
- a window frame having vertical side rails of generally L-shaped open channel construction, and horizontal top and bottom frame portions;
- a sash member having a top, bottom and two sides, and slidably pivoted at its sides adjacent the bottom thereof to said side rails, and retractable bolt means holding the sides of said sash near the top thereof to said side rails;
- said L-shaped channel of each said side rail being open toward the inside of said sash with a first leg of said L extending parallel to said sash along the outside edge of the side of said sash, and a second leg of said L extending parallel to the thickness of said sash;
- weather-stripping between the outside edge of each side of said sash and the first leg of said L, said weather-stripping extending generally parallel to the second leg of said L and being normally sealingly disposed between the sash side and the first leg of said L;
- and inter-engageable stop means to limit deflection of said sash member toward the inside and to prevent unsealing of said weather-stripping when the sash member is subjected to heavy external wind forces, said stop means comprising respective projections on the side edge portions of the sash member and on the second leg of said L of each side rail, said projections serving to interengage when the sash member is subjected to heavy winds but the terminal portions of such projections being spaced laterally of the window assembly to permit frictional clearance of said projections when said sash member is tilted.
Dependencies are inferred from the claim text.