Patent ID: 7470177

Claim:
A device for control of air flow rates into instrument panel air outlets of a vehicle heating and air conditioning unit comprising: a casing with a first damper door for a first instrument panel air outlet in a first casing part and a second butterfly damper door for an instrument panel central air outlet in a second casing part wherein the first outlet and the second outlet are substantially aligned in a common plane, whereby the first damper door and the second damper door are pivotably supported on a common shaft and oriented on the shaft in phase at an angle of substantially 0° to each other, wherein only one closing position is assigned to the first damper door over a pivoting range of a pivoting region of the shaft, and a plurality of closing positions are assigned to the second damper door over the pivoting range of the shaft, and wherein the closing position of the first damper door is arranged in the pivoting range of the shaft.