Automatic door object sensing system

Details Automatic door object sensing system Automatic door object sensing system

1984-11-26

1986-03-25

Kannan, Philip C.

Movable or removable closures

Radiant energy control

49 26, 318480, E05F 1520

Patent

active

045774374

ABSTRACT:
Mechanism for automatic swing doors including three motion detectors, two associated with the approach side of the door and one on the swing side of the door, with the detectors on the approach side effective, when activated, to open the door and the detector on the swing side effective, when activated, to slow down the moving door.

REFERENCES:
patent: 2138521 (1938-11-01), Ellis
patent: 4009476 (1977-02-01), Lutz
patent: 4029176 (1977-06-01), Mills
patent: 4272921 (1981-06-01), Jorgensen
patent: 4458446 (1984-07-01), Mochida et al.
patent: 4467251 (1984-08-01), Jonsson

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