Insulator for rail interlock at upper/lower window sash interface
AssigneeCapitol Products Corporation
InventorDietrich F. Schmidt
Life of this patent
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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.
Claims8
A metal frame window or door assembly of the type having a rail of a first sash with an interlock and a rail of a second sash with an interlock, the improvement which comprises one of said interlocks carrying a separate insulator means of rigid PVC or injection molded nylon interposed between said interlocks, and said other interlock being dimensioned and configured with respect to said insulator means so as to allow lateral movement between said interlocks.
Dependencies are inferred from the claim text.