Patent ID: 6430871
Filing Date: 2002-08-13
Classification: E05F,E05Y

Abstract:
A door operating device for opening and closing a door in a wall, said device comprisinga linkage having first means for connecting to said door, second means for connecting to said wall, and having a moveable member, said member moveable through a path of travel having a first position on said path corresponding to said door in a closed position and a second position on said path corresponding to said door in an open position wherein movement of said member from said first position to said second position corresponds with movement of said door from said closed position to said open position, third means moveable through said path of travel of said member for pushing said member from said first position to said second position, a motor connected to said third means for moving said third means from said first position to said second position, and said third means making abutting contact with said member without being locked for simultaneous movement therewith wherein said member is pushed along said path by said third means for powered opening of said door and said member is moveable free from said third means during a manual opening of said door.