Patent ID: 7571877
Filing Date: 2009-08-11
Classification: B64C,E05B,Y10T

Abstract:
1. An operation mechanism adapted for activating a deceleration device for decelerating an opening movement of a door, the operation mechanism comprising: a pivot lever arrangement; a pivot arm arrangement being located in the door's track of travel and coupled to the pivot lever arrangement; a damping arrangement being adapted to block rotation of the pivot lever arrangement; a first engagement means attached to a belt of the deceleration device and said belt being concealed by the pivot arm arrangement and detachably mounted thereon; and a second engagement means located at an edge portion of the door and designed to engage with the first engagement means; wherein the operation mechanism features a first mode of operation and an second operation mode; wherein the damping arrangement allows rotation of the pivot lever arrangement in the first mode of operation when being loaded by an impact due to a first opening impulse below a predetermined threshold value delivered from the door edge, whereas in the second mode of operation the damping arrangement blocks rotation of the pivot lever arrangement when being loaded by an impact due to a second opening impulse above the predetermined threshold value delivered from the door edge; wherein due to the first impulse delivered from the door edge to the pivot arm arrangement in the first mode of operation, the pivot arm arrangement rotates together with the pivot lever arrangement without relative movement between both lever arrangements; and wherein due to the second impulse delivered from the door edge to the pivot arm arrangement in the second mode of operation, the pivot arm arrangement at least partially uncouples from the pivot lever arrangement thereby exposing the first engagement means, wherefore by further movement of the door the advancing second engagement means will engage with the first engagement means detaching said first engagement means from the pivot arm arrangement, so that by further movement of the door the belt of the deceleration device will be withdrawn from said deceleration device spool reel, thus breaking the acceleration of the door.