Revolving door comprises a door blade locking mechanism with a thrust element which exerts pressure on the door blade and secures it in its working position as long as a specified electric voltage level is maintained

摘要

The revolving door comprises a door blade locking mechanism (18) incorporating a thrust element (38) which exerts pressure on the door blade (16) and secures it in its working position as long as a specified electric voltage level is maintained. When this voltage drops below a specified level, the pressure is released and the door blade becomes pivotable into an emergency position.