Movable or removable closures – With operator for movably mounted closure – Operator drives closure along guide
Patent
1976-04-21
1978-01-03
Downey, Kenneth
Movable or removable closures
With operator for movably mounted closure
Operator drives closure along guide
E05F 1514
Patent
active
040658783
ABSTRACT:
An automatic door opening and shutting device is disclosed. The present device comprises a support having an upper tube movable up and down toward a fixed lower tube, a driving source mounted on the upper tube of the support, a friction drive means for carrying out a friction drive of the door by transmitting power of the driving source to the door and a detecting means for detecting either person or vehicle coming in and out of the door, wherein a clockwise an anticlockwise actuation of or stop of the friction drive means can be controlled automatically by signals transmitted from the detecting means or the like.
REFERENCES:
patent: 374647 (1887-12-01), Albright
patent: 2871009 (1959-01-01), Picatti
patent: 3826043 (1974-07-01), Seng
Downey Kenneth
Striker Michael J.
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