Automatic door control system

Details Automatic door control system Automatic door control system

1980-09-24

1982-12-28

Downey, Kenneth

Movable or removable closures

With operator for movably mounted closure

Operating lever or link and closure swing about parallel axes

49 30, 49344, E05F 1124

Patent

active

043654428

ABSTRACT:
An automatic door operating system includes a gas operated linear motor connected to operate a door by means of a unidirectional linkage system including an arm for unidirectional engagement of the door and a control system including a source of compressed gas for selectively opening the door and for controlling the duration of the door open position. The control system includes a variable timing release for variable timing of the duration of the valve opening. The actuator for the system can be remotely positioned for maintaining the door in open position for sufficient duration to permit passing therethrough. The linkage system permits the door to be manually operated totally independent of the operating system.

REFERENCES:
patent: 2758835 (1956-08-01), Wikkerink
patent: 2900791 (1959-08-01), Kinsey
patent: 3136537 (1964-06-01), Whitfield
patent: 3874117 (1975-04-01), Boehm

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