Patent ID: 7931525
Filing Date: 2011-04-26
Classification: B60H,F24F

Abstract:
1. Device for controlling an air flow in a ventilating pipe comprising: a) one or more air flaps actuated synchronously and which prevent the air flow in the ventilating pipe in closed position, b) wherein each of the one or more air flaps is rigidly connected to a drive axle, c) a fastening web with a pivot bearing for said drive axle of the one or more air flaps, wherein the one or more air flaps are rotational about an axis of the drive axle, d) gearing means for transmitting force and/or torque to the drive axle connected to said one or more air flaps, e) wherein said gearing means for transmitting force and/or torque are mounted on the fastening web, f) a fastening web holder fixing the fastening web to the inside of the ventilating pipe wherein said fastening web and said gearing means for transmitting force and/or torque are arranged in the ventilating pipe, on a longitudinally extending plane of symmetry, g) a rotatable connection between said fastening web holder and the fastening web, wherein said rotatable connection is at a distance from said drive axle and parallel to said drive axle, h) such that the same fastening web fitted with various air flaps can be used for cross-sectionally differently dimensioned ventilating pipes.