Method of driving door of automatic door assembly

Details Method of driving door of automatic door assembly Method of driving door of automatic door assembly

1976-05-24

1978-01-10

Downey, Kenneth

Movable or removable closures

With operator for movably mounted closure

Operator drives closure along guide

49138, 49 29, E05F 1518

Patent

active

040671445

ABSTRACT:
A method of driving a door of an automatic door assembly by a linear motor mounted within the automatic door assembly. The method comprises the steps of driving the door by a normal propulsion force of the linear motor and then driving the door by an added propulsion force which is greater than the normal propulsion force, at least during a final portion of the stroke of the door thereby overcoming the reaction force of cushioning devices provided near the ends of the door stroke.

REFERENCES:
patent: 3621349 (1971-11-01), Reyz

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