AIR BLAST WITH INTEGRATED DAMPER WITH IMPROVED TIGHTNESS Russian patent published in 2017 - IPC F04D25/14 

FIELD: ventilation.

SUBSTANCE: air blast (100) is formed by connecting parts of the housing a (105) outer periphery, the air blast having the inlet hole (103) and the air blast housing b (106). The protruberance (104b) of the lock flap is formed in the lower surface of the outlet (104), and wherein the part (107) of the housing is made in the upper part of the outlet hole 104. The fixing parts (105a) for the damper motor screws are integrally formed with the outer surface of the upper part (107) of the housing. The hole (105b) for the damper shaft is drilled in the side surface of the housing from the inlet hole side of the protruding part (105b) for the damper motor shaft hole. The shaft (106a) to rotate the flap protrudes from the inner surface of the protruding part (105b") for the damper motor shaft hole of the air blast housing b, facing to the protruding part (105b') for the damper motor shaft hole of the air blast housing. The flap 202B to open or close the outlet hole with one element is attached to the shaft (201a) of the damper motor and the shaft (106a) for rotating the flap.

EFFECT: air blast tightness increase.

3 cl, 5 dwg