Movable or removable closures – Operator for retractable sealing – guiding or locking strip – Opposed strips actuated concurrently
Patent
1983-05-25
1987-04-14
Kannan, Philip C.
Movable or removable closures
Operator for retractable sealing, guiding or locking strip
Opposed strips actuated concurrently
49321, E06B 728
Patent
active
046567798
ABSTRACT:
A blocking system for doors, windows and the like, particularly of the armored type, to have antitheft, antibreaking, fluid-tight and soundproof features, comprising a frame (11), a wing (12) and two pairs of mechanically interconnected blocking members (13,13'-14,14') which are arranged in housing slots (15,15'-16,16') provided along the opposite perimetrical flat inner edges of the frame (11) and sliding into facing slots (17,17'-18,18') of the wing (12) by the tension action of springs (34,34') to close the door, the backwards motion of these blocking members being carried out by the pushing action of a pin (38) which is manually operated through a central control device (20), when the door is to be opened. The outwards and backwards motions of the blocking members are synchronous and the outwards motion of same from the housing slots of the frame into facing slots of the wing is automatically provided by means of the tension of springs (34,34').
REFERENCES:
patent: 1178775 (1916-04-01), Albright
patent: 2207065 (1940-07-01), McCormick
patent: 2805451 (1957-09-01), Evans et al.
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