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US 5,704,166 AGranted
Window assembly with safety catch for vertically sliding sash
AssigneeAlumicor Limited
InventorsTerry Tam, Mirko Kovac, Don Thomson
Life of this patent
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AssigneeAlumicor Limited
InventorsTerry Tam, Mirko Kovac, Don Thomson
Estimating the term…
A window assembly with a safety catch comprises a manually movable window sash which normally slides between a raised and a fully lowered position within a surrounding window frame. A weight is connected to the sash by a cable which counter-balances weight of the sash. The safety catch prevents downward falling of the sash to the fully lowered position in the event of breakage of the cable. The safety catch comprises a sash block spaced below the weight and clear of the sash when the cable is intact and the weight is positioned to fall if released from the sash to move the sash block to a blocking position which holds the sash above its fully lowered position.
A window assembly comprising a manually operated window sash which normally slides between a raised and a fully lowered position within a surrounding window frame, a weight connected to said sash by a cable counter-balancing weight of the sash and safety means which prevents downward falling of said sash to the fully lowered position in the event of breakage of said cable, said safety means comprising a sash block spaced below said weight and being clear of said sash when said cable is intact, and said weight being positioned to fall when released from said sash and said weight moves said sash block to a blocking position holding said sash above the fully lowered position.
Dependencies are inferred from the claim text.