Automatic operating system for swinging door

Details Automatic operating system for swinging door Automatic operating system for swinging door

1990-07-30

1991-09-24

Kannan, Philip C.

Movable or removable closures

Operator interrelated with closure latch release

Motor driven

49300, 292 33, 292144, E05F 1500

Patent

active

050503464

ABSTRACT:
An automatic operating system for swinging doors which is controlled by the user by means of a miniature, hand-held radio transmitter having a single operating pushbutton. Depression of the pushbutton results, sequentially, in the retraction of the deadbolt, the retraction of the main latch, and the opening of the door. The door then remains open until the pushbutton is again depressed, whereupon the main latch is extended, the door is swung to its closed position, the deadbolt is extended into its associated recess in the doorjamb, and the air pressure in the automatic door operating system is bled to atmospheric level, resetting the system to its normal or quiescent state.

REFERENCES:
patent: 898865 (1908-09-01), Galarneau et al.
patent: 1920868 (1933-08-01), Kirk
patent: 2091388 (1937-08-01), Dorsey
patent: 2538980 (1951-01-01), Payne, Jr.
patent: 3099438 (1963-07-01), Fritz
patent: 3791180 (1974-02-01), Doyle
patent: 3996591 (1976-12-01), Hayward
patent: 4913475 (1990-04-01), Bushnell et al.

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