Patent ID: 7059084

Claim:
A door opener for opening and closing an outwardly swinging door mounted for pivotal movement by substantially vertically aligned hinges disposed on one side of the outwardly swinging door such that the door swings outwardly to reveal an opening and swings inwardly to block the opening, the door opener comprising: a track extending inwardly in a direction substantially opposite from the direction of swing of the outwardly swinging door; a trolley slidably coupled with the track, such that the trolley can move along the track generally toward the outwardly swinging door and generally away from the outwardly swinging door; at least one push bar having a first distal end and a second distal end, the push bar pivotally coupled with the trolley at the first end and configured for pivotal coupling with the outwardly swinging door at the second end, the at least one push bar comprising a slip joint coupled with a tension spring which adjusts a distance between the distal ends of the at least one push bar during operation of the door opener; wherein movement of the trolley along the track in a first direction is adapted to cause the push bar to push on the outwardly swinging door; and wherein movement of the trolley along the track in a second direction opposite the first direction is adapted to cause the push bar to pull on the outwardly swinging door.