Drive for tiltable and moveable door leaf, has closure spring to which pre-stress is mechanically applied in closed state of door leaf, where drive closes door by activation of delay cut-off of motor current and tension release of spring

摘要

The drive has a motor (4) and a closure unit (6) loosely linked to a door leaf (2) over a linkage. A pre-stressing is mechanically applied to a closure spring in a closed state of the door leaf, where the spring is situated in the closure unit. The drive closes the door by activation of delay cut-off of the motor current and subsequent tension release of the spring. The motor works as a generator during the closure of the door leaf. The closure of the door leaf take place under the effect of the closure spring.