Patent ID: 7175399

Claim:
An apparatus for a serial ventilation device comprising: a casing; a first ventilator, mounted on an air intake opening side of the casing, having a first rotating shaft and at least one intake blade having a front surface facing the air intake opening side and a rear surface, said at least one intake blade being mounted on said first rotating shaft; and a second ventilator, mounted on an air exhaust opening side of the casing, having a second rotating shaft and at least one exhaust blade with a front surface facing the air exhaust opening side and a rear surface, said at least one exhaust blade being mounted on said second rotating shaft, wherein the first ventilator performs ventilation from the front surface to the rear surface of the at least one intake blade and then towards the second ventilator, and the second ventilator performs ventilation from the rear surface to the front surface of the at least one exhaust blade and then towards the exhaust, further wherein said first rotating shaft is independent from and coaxial to said second rotating shaft; further wherein said rotating shafts rotate in opposite directions; further wherein each of said ventilators comprise a motor base, with an outer circular wall shaped in a tilted configuration such that a diameter of the outer circular wall of said motor base decreases to the midpoint between the first and second ventilators.