DOOR CLOSING DEVICE Russian patent published in 2002 - IPC

FIELD: construction and servicing of buildings and structures, in particular, design of doors and hatches. SUBSTANCE: the device has a sleeve linked with the door frame. The sleeve is provided with a hydraulic damper having a tube with holes for transfer of liquid and a return spring. Installed on the inner end of the tube positioned in the sleeve cavity are a flexible ring prevented from movement on the tube by threaded rings, and a washer with holes on its surface resting on the tube. The outside diameter of the washer exceeds the outside diameter of the tube. The washer can move on the screw installed in the end-piece and is supported by a spring located between the end- piece and the washer. EFFECT: improved operating characteristics of the door closing device, in particular, maintainability and reliability. 3 dwg