Patent ID: 7484333
Filing Date: 2009-02-03
Classification: E05F,E05Y

Abstract:
1. A method using a door operator for selectively automatically operating a door positioned within a door frame and hinged along one edge to the door frame for movement between a closed position and an open position, the door operator including a bi-directional motor assembly coupled to a source of electrical energy and an automatic door closer assembly operably connected to the door, the door closer assembly including means for providing a force on the door in a closing direction when the door is in an open position for moving the door to the closed position, the door operating method comprising: providing a drive mechanism adapted to be disposed between the motor assembly and the door closer assembly, the drive mechanism comprising; wherein when the drive member and the driven member are in their respective first angular orientations, one of the driving surfaces of the protrusion of the drive member is adjacent to one of the driven surfaces of the protrusion of the driven member; rotating the drive member from the first angular orientation toward the second angular orientation in a direction toward the adjacent driven surface causing rotation of the driven member for powered opening of the door from the closed position to an open position; and rotating the drive member toward the first angular orientation of the drive member in a direction away from the adjacent driven surface at a speed faster than the door closer assembly means rotates the driven member toward the first angular orientation of the driven member such that the protrusion moves in the free space without engaging the protrusion surfaces when the door is allowed to close.