Arrangement in a swing door apparatus provided with a door closer

• US 20070022664A1
• Filed: 08/27/2004
• Published: 02/01/2007
• Est. Priority Date: 09/18/2003
• Status: Abandoned Application

• Current Assignee: Abloy Oy (Assa Abloy AB)
• Original Assignee: Abloy Oy (Assa Abloy AB)
• Inventors: Surakka, Markku, Mähönen, Markku
• Application Number:
  US10/571,376
• Publication Number:
  US 20070022664A1
• Time in Patent Office: Days
• US Class Current: 49/342
• CPC Class Codes: E05F 15/63 operated by swinging arms
• CPC Class Codes: E05F 3/102 with rack-and-pinion transmission between driving shaft and piston within the closer housing
• CPC Class Codes: E05Y 2900/132 Doors

Abstract

An arrangement in a swing door apparatus comprising a door closer provided with a return spring, which door closer comprises a body part and inside it a movable piston member, which is in force transmitting connection with a driving shaft, which is turned in accordance with the movements of the door, and an actuator, for instance an electric motor, the operating shaft of which may be in operative connection with said piston means for providing the opening movement of the door by utilizing a worm shaft, one end of which is driven by a drive nut connected to the piston member and the other end may be connected to said operating shaft of the actuator. The worm shaft comprises a worm section and a shaft section integrated thereto and provided with a flange member, which is in cooperation with a thrust bearing unit so that the moving of the worm shaft in the axial direction with respect to the body part of the door closer is prevented. Coupling means are arranged between the operating shaft of the actuator and the shaft section of the worm shaft, which coupling means are arranged to disconnect the force transmitting connection between the actuator and the shaft section of the worm shaft and to provide said force transmitting connection for accomplishing the opening movement of the door.

Claims

1-3. -3. (canceled)

4. An arrangement in a swing door apparatus comprising a door closer provided with a return spring, which door closer comprises a body part and inside it a movable piston member, which is in force transmitting connection with a driving shaft, which is turned in accordance with the movements of the door, and an actuator, for instance an electric motor, the operating shaft of which may be in operative connection with said piston means for providing the opening movement of the door by utilizing a worm shaft, one end of which is driven by a drive nut connected to the piston member and the other end may be connected to said operating shaft of the actuator, wherein the worm shaft comprises a worm section and a shaft section integrated thereto and provided with a flange member, which is in cooperation with a thrust bearing unit so that the moving of the worm shaft in the axial direction with respect to the body part of the door closer is prevented, and that coupling means are arranged between the operating shaft of the actuator and the shaft section of the worm shaft, which coupling means are arranged to disconnect the force transmitting connection between the actuator and the shaft section of the worm shaft and to provide said force transmitting connection for accomplishing the opening movement of the door.

5. An arrangement according to claim 4, wherein one end of the drive nut is connected to the piston member and the other end is arranged to cooperate with one end of the return spring of the door closer.

6. An arrangement according to claim 4, wherein the angle of thread of the worm section of the worm shaft and the drive nut is chosen so that it is sufficiently large, for instance at least 26°

, preferably about 32°

-40°

, so that their reciprocal cooperation is nearly reversible.