Patent ID: 6067753
Filing Date: 2000-05-30
Classification: E05F,E05Y

Abstract:
A door operating device for opening and closing a door in an opening in a wall, said device comprising in combination:a linkage having first means for connecting to a door and second means for connecting to a wall,reversible electric motor means for driving said linkage for moving said door toward an open condition when said electric motor means is driven in a first direction and for moving said door toward a closed condition when said electric motor means is driven in a second direction,clutch means for connecting and disconnecting said electric motor means to said linkage,means for engaging said clutch means upon the direction of electric power to said reversible motor means and for disengaging said clutch means upon the termination of electric power to said electric motor means,start means for receiving an instruction to initiate the operation of said device,door open sensor means for detecting that said door is in an open condition,door closed sensor means for detecting that said door is in an open condition, andcontrol means connected to said electric motor means and responsive to said door open sensor means, said door closed sensor means, and said start means, for directing electric power to said motor means upon actuation of said start means and for terminating electric power to said motor means upon receipt of a signal from one of said door open sensor means and said door closed sensor means.