Darby & Darby
Door swinging device for automatically swinging doors
 A door swinging device for automatically swinging a door hinged to a door supporting frame so as to be angularly movable about a vertical axis. The door swinging device includes: (a) a mechanism for rotating; (b) an arm member adapted to be attached at one end thereof to the rotating mechanism so as to be rotated in a plane; (c) a slider rotatably connected to the other end of the arm member; and (d) a guiding mechanism, adapted to be attached to one of the door and the door supporting frame, for guiding slidably the slider in a direction parallel with the plane. 
Chikura Kogyo Kabushiki Kaisha
E E E E
E05Y E05Y E05F E05Y
additional additional inventional additional
Kei Yoichiro
Yoshida Saotome