Movable or removable closures – Mounted for optional movements – One closure movable separately from or with other closure
Patent
1989-02-17
1990-04-03
Kannan, Philip C.
Movable or removable closures
Mounted for optional movements
One closure movable separately from or with other closure
49 62, E06B 728
Patent
active
049128779
ABSTRACT:
A security door comprises an outer frame for closing off a doorway and door hinge means connected to the outer frame for hingedly mounting the outer frame in the doorway. An opening is provided through the outer frame and a plurality of security bars are mounted on the outer frame and extend across the opening. A closure member for closing off the opening is provided, closure member hinge means being connected to the closure member whereby the closure member is pivotally mounted on the outer frame. An insert is provided by the closure member, which insert projects into the opening in the outer frame and occupies said opening when the closure member is in its closed condition, the insert having a plurality of recesses in the form of elongate grooves for respectively receiving the security bars when the closure member is in its closed condition with the bars at least partially enclosed and concealed therein. Lockable door latch means for locking the outer frame in its closed condition to the doorway, and lockable closure member latch means for locking the closure member in its closed condition to the outer frame, are provided.
REFERENCES:
patent: 1100564 (1914-06-01), Heryford
patent: 1580826 (1926-04-01), Haenssler
patent: 1859974 (1932-05-01), Kroenke
patent: 2568130 (1951-09-01), Olson
patent: 3895669 (1975-07-01), Heeling
patent: 4592167 (1986-06-01), Andrawos
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