Insulator for rail interlock at upper/lower window sash interface
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United States of America Patent
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-
May 9, 1989
Grant Date -
N/A
app pub date -
Sep 18, 1987
filing date -
Sep 18, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A modification for window or door assemblies having interlocks on the sash rails where insulating material is placed between the interlock of a lower rail to an upper sash and the interlock of an upper rail to a lower sash so as to act as a thermal barrier against heat conduction through the upper sash which is exposed to exterior climate of the building in which the window or door assembly is being used.
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Family
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Cited Art Landscape
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